The core of the new round of energy revolution is renewable energy generation and large-scale energy storage. Among many electrochemical energy storage technologies, sodium ion battery is one of the ideal choices for large-scale energy storage because of its rich resources, low cost, high safety, high conversion efficiency, flexibility, convenience, easy integration, fast response and maintenance-free.

　　— — Hu Yongsheng, researcher of Institute of Physics, Chinese Academy of Sciences, founder and chairman of Zhongke Haina.

　　Intern reporter Yu Ziyue

　　Recently, high-tech enterprises such as Zhongke Haina Technology Co., Ltd. (hereinafter referred to as Zhongke Haina) and Huayang New Materials Technology Group Co., Ltd. hatched by Institute of Physics, Chinese Academy of Sciences signed a contract with the Management Committee of Shanxi Transformation Comprehensive Reform Demonstration Zone to build a production line for anode and cathode materials of sodium ion batteries with an annual output of 2,000 tons in Taiyuan.

　　On February 20th, Hu Yongsheng, a researcher at the Institute of Physics of Chinese Academy of Sciences and the founder and chairman of Zhongke Haina, said in an interview with the Science and Technology Daily reporter that China’s sodium ion batteries are in the forefront of the world in terms of technology research and development such as material system and battery comprehensive performance, as well as in terms of industrialization speed, demonstration application, patent layout and standard formulation, and have already had the first-Mover advantage.

　　New energy nova is accelerating on the road of industrialization.

　　The development of fossil energy such as coal, oil and natural gas has led to the rapid development of human society, and the progress of modern non-fossil energy is also triggering a new round of energy revolution. Who will be the protagonist this time?

　　The voice of lithium-ion batteries is very high. However, when lithium-ion batteries are widely used in more and more fields in China, an unavoidable problem is becoming more and more worrying — — China’s lithium resources are highly dependent on imports. It is necessary to develop energy storage battery technology which does not depend on rare resources and has low cost.

　　Sodium ion battery, which is closest to lithium ion battery technology, has begun to emerge. In recent years, related achievements with independent intellectual property rights have emerged continuously. Intelligent electric bicycles, low-speed electric vehicles, home energy storage cabinets, energy storage power stations and sightseeing electric vehicles in parks/scenic spots with sodium ion batteries as the "heart" have come out one after another, and many achievements have been released for the first time in the world.

　　In the "Top Ten Scientific Progress in China in 2020" recently organized by the High-tech Research and Development Center of the Ministry of Science and Technology, sodium ion battery research was selected as 30 candidate results.

　　As a new star of new energy, sodium ion battery is accelerating on the road of industrialization, or it will become an opportunity for China to lead a new round of energy revolution.

　　"Sodium" attracts talents to make up for the lack of "lithium"

　　Globally, the distribution of lithium resources is extremely uneven, with about 70% distributed in South America. Available data show that at present, 80% of lithium resources in China depend on imports.

　　"Although lithium-ion batteries have become ‘, which accounts for 80% of the global electrochemical energy storage scale market; Absolute first brother ’ However, the scarcity of its resources and high cost have led to the large-scale development of its industry facing the ceiling. " Hu Yongsheng said in an interview with the Science and Technology Daily reporter.

　　How to solve the problem? It is urgent to find a cheap substitute.

　　Therefore, sodium ion batteries with the same working principle and similar battery components as lithium ion batteries have ushered in a great development opportunity.

　　Similar to lithium-ion batteries, sodium ion batteries rely on the reversible stripping and embedding of sodium ions between positive and negative electrodes to realize the storage and output of electric energy.

　　Sodium resources are extremely abundant in the earth’s crust, and the abundance of the earth’s crust is more than 1000 times that of lithium. Sodium ion batteries have shown significant advantages in cost. If the same energy is stored, the cost will be about 30% less than that of lithium ion batteries. Because of the similar battery structure, most of the existing lithium ion battery production equipment can be directly put into the production of sodium ion batteries, which further improves the cost control.

　　In the process of industrialization, low price is very important, but good quality is more important. Hu Yongsheng told the Science and Technology Daily reporter that the comprehensive performance of sodium ion batteries shows multiple advantages.

　　With the deepening of research, researchers found that sodium ion batteries have good power characteristics, wide temperature range adaptability, safety performance and no discharge problems. In addition, both the anode and cathode of the sodium ion battery can adopt aluminum foil current collectors, which can further improve the energy density of the sodium ion battery and make the sodium ion battery move towards the direction of low cost, long life, high specific energy and high safety.

　　Hu Yongsheng, for example, now commonly used mobile phone lithium-ion batteries can be fully charged in about one hour, while sodium-ion batteries can be fully charged in ten minutes or even less. It is frequently reported that lithium-ion batteries go on strike at low temperature in winter, while the discharge characteristics of sodium-ion batteries are still very good in the environment as low as -30℃ and as high as 80℃, which shows that they are environmentally friendly, very "sturdy" and can withstand tossing. "We have done experiments, using a steel needle to pierce the sodium ion battery, artificially shorting it, and found that there was no fire or explosion."

　　Cheap, "sturdy" and safe, sodium ion batteries are likely to become an important supplementary technology for lithium ion batteries in the future.

　　Breaking the technical bottleneck and broadening the application scope

　　Positive electrode, negative electrode and electrolyte are the three elements of sodium ion battery. Among them, most cathode materials face bottlenecks such as poor stability, short cycle life and high cost.

　　In order to solve these problems, the research team of Hu Yong Sheng bypassed the high-priced elements such as nickel and cobalt, which are commonly used as cathode materials for lithium-ion batteries, and used common elements such as copper, iron and manganese, and developed a layered oxide cathode material system for sodium-ion batteries with low cost, high stability and long service life.

　　Previously, the team cooperated with international scholars and published the research results on the cathode materials of sodium ion batteries for the first time in Science magazine.

　　Relying on the sodium ion battery technical team of the Institute of Physics, Zhongke Haina was established in 2017, becoming the first high-tech enterprise in China to focus on the R&D and production of sodium ion batteries. At present, Zhongke Haina has been financed twice, totaling 58 million yuan, for pilot technology development, and has built a 100-ton pilot test line for anode and cathode materials of sodium ion batteries and a million ampere-hour battery core line, and developed many products, such as soft bags, aluminum shells and cylindrical batteries, with energy density of 100— Between 150 watt-hours per kilogram, it is more than 3 times that of lead-acid battery, and its cycle life is more than 4500 times. Not long ago, the Science and Technology Cooperation Center of Beijing Municipal Science and Technology Commission organized an expert group to accept the project it undertook. The evaluation given by the expert group was that the relevant technical indicators reached the international leading level.

　　At the end of 2017, the team developed a 48V/10Ah sodium ion battery pack for electric bicycles; In 2018, the team developed a 72V/80Ah sodium ion battery pack and launched the world’s first sodium ion battery electric vehicle.

　　It is reported that the team has obtained more than 20 patents authorized by China on key materials such as positive electrode, negative electrode, electrolyte, additives and adhesives (some patents have been authorized by the United States, Japan and the European Union), and published more than 100 papers in academic magazines such as Science and Nature, which have been cited for more than 10,000 times.

　　These scientific research achievements will also play the role of engines, and will be transformed in a series of incubation enterprises such as Zhongke Haina, providing inexhaustible power for the commercial development of sodium ion batteries.

　　High hopes are placed on scale energy storage.

　　Climate change is a global problem facing human beings, so China has put forward the goal of carbon neutrality in 2030 peak carbon dioxide emissions and 2060, which also means that China’s economy and society will usher in a comprehensive low-carbon change.

　　In 2017, Chen Liquan, an academician of China Academy of Engineering, put forward the idea of "electric China". This coincides with China’s advocacy of building a global energy internet to meet global power demand in a clean and green way.

　　So, here’s the problem.

　　Solar energy and wind energy are the main renewable new energy sources to generate electricity, but they are random, intermittent and fluctuating. Solar panels can generate electricity in sunny days and during the day, but on cloudy days and at night, they "stop eating". Wind power generation is also closely related to wind power and weather. However, nowadays, we can’t leave electricity for a moment, and we can’t stand the days when electricity is only available when the weather is "awesome".

　　There is an urgent need for large-scale energy storage devices, mainly energy storage power stations, to store surplus electric energy and use it when power generation is insufficient to ensure a stable supply of electricity.

　　At present, the lithium-ion battery is the "first brother" in the energy storage demonstration power station. However, due to various restrictions mentioned above, the lithium-ion battery cannot support the two huge markets of electric vehicles and large-scale energy storage at the same time. Therefore, Academician Chen Liquan and researcher Hu Yongsheng have high hopes on the sodium-ion battery.

　　In 2019, Zhongke Haina launched the world’s first 100 kWh sodium ion battery energy storage power station, which realized the demonstration application of sodium ion battery in large-scale energy storage for the first time.

　　"peak carbon dioxide emissions and carbon neutrality are China’s solemn commitments and opportunities to lead the third energy revolution." Hu Yongsheng pointed out that the core of the new round of energy revolution is renewable energy power generation and scale energy storage. At present, the former is close to maturity, while the latter is still developing. Among many electrochemical energy storage technologies, sodium ion battery is one of the ideal choices for scale energy storage because of its rich resources, low cost, high safety, high conversion efficiency, flexibility, convenience and easy integration, fast response speed and maintenance-free.

　　Due to the huge energy storage market and industrial demand, combined with China’s perfect lithium-ion battery industry chain, sodium ion batteries have already had the conditions to take the lead in realizing industrialization and commercialization in China.

　　"I believe that with the strong support of the top-level planning and related policies of governments at all levels in China, with the collaborative innovation of production, learning and research and the promotion of social capital, sodium ion batteries will surely play an important role in achieving the goals of peak carbon dioxide emissions and carbon neutrality." Hu Yongsheng said.

Skipping rope VS running, what are their advantages and disadvantages? Which sport should you choose to lose weight?

Skipping rope and running are very common aerobic exercises, which can help us lose weight, improve cardiopulmonary function and enhance physical fitness.

However, they are also different in many ways.Next, let’s discuss the advantages and disadvantages of skipping rope and running, and how to make a decision when choosing a weight loss exercise.

First, let’s look at the advantages of skipping rope:

1. Skipping rope is a very convenient and flexible sport. You don’t need too much space. You only need a rope to start exercising anytime and anywhere.

2, skipping rope can exercise the whole body muscle groups, including arms, abdomen, legs and other parts, which helps to improve the coordination and sensitivity of the body.

3. Sticking to skipping rope can also promote blood circulation, improve the body’s oxygen intake, effectively improve cardiopulmonary function and enhance the ability of the heart and lungs.

4, skipping exercise is more flexible, there are a variety of ways to play, which is more interesting, and can also help you lose weight and help you burn calories quickly.

However, skipping rope also has its disadvantages:

1. It may be difficult for some people, because it requires certain skills and balance.

2. Jumping rope requires higher vital capacity, and many novices can’t hold on for 2 minutes without panting.

3. When skipping rope, the knee needs to bear the pressure value of twice its own weight.

Next, let’s take a look at the advantages of running:

1. Running is a very low threshold aerobic exercise suitable for men, women and children. It can effectively improve the cardiopulmonary function, enhance physical fitness and lose weight.

2. Running can promote metabolism, accelerate fat burning and burn calories. Jogging for 1 hour every day can help you improve obesity.

3, running can also increase bone density, promote calcium coefficient, but also enhance the strength and endurance of leg muscles, so that your lower limbs are more flexible and powerful.

However, the disadvantages of running are also obvious:

1. Outdoor running is easily affected by the venue and weather. When the weather is too cold, the desire to run will decrease, and rainy days will also affect the enthusiasm of running.

2. Running has a great impact on joints, and the knee needs to bear 2.5-3.5 times the weight, so it may be uncomfortable for some people.

Should you choose skipping rope or running?We should make a decision according to our physical condition, interests and goals.

If you want to burn calories quickly and improve your body’s agility and coordination, skipping rope may be a better choice. If you have poor physical endurance, no sports experience and want to lose weight, then running may be more suitable for you.

No matter which sport you choose, you should pay attention to gradually increasing the intensity and time of exercise to avoid injury. At the same time, we should also pay attention to reasonable diet and rest to get the best exercise effect.

Sitting around a table with my family and eating a family reunion dinner cooked by them is probably what most people think of New Year’s Eve. However, there are a group of people who still stick to their posts on New Year’s Eve. Their persistence is to ensure the smooth travel of passengers from south to north. Kang Bin, director of the North Passenger Transport Workshop of Chongqing Railway Station, is one of them.

"The train arrived at 16: 08. Did you get all the gloves? Check it again, it’s sloppy. " At 15: 20 on January 24, Kang Bin said with a walkie-talkie. Then, he strode forward to the duty room and organized personnel to make relevant preparations.

At 15: 30, eight staff members arrived.

Wear masks, rubber gloves and goggles … Kang Bin and his colleagues skillfully put on protective tools and walked to the exit. "Everyone will be divided into 4 groups, 2 people in each group, take temperature one by one, wear protective gear and pay attention to safety." Along the way, Kang Bin kept telling the team members.

At 15: 40, all the team members are in place. Everyone stands in their positions, takes out hand-held temperature detectors, measures each other’s temperatures, and tests the instruments. After everything is in order, they wait for the outbound passengers.

At 16: 10, a large number of passengers emerged at the exit. Two staff members kept order at the scene and let everyone line up in turn. The staff members stood at the gate exit and took the temperature of each passenger. Kang Bin told chongqing morning post, an upstream news reporter, that there are now more than 40 trains that leave and stop in Wuhan every day (Wuhan keeps turning back immediately), and each train has at least 600 passengers. They have to take the temperature of the passengers on each train, and the workload is very heavy.

At 16: 30, the temperature measurement is over. Kang Bin returned to the office with the team members, took off his glasses, gloves and washed his hands … "Let’s rest for a few minutes, and the next bus is at 16: 26." Kang Bin said.

"Today, we have more than 200 people on duty, many of whom give up their vacations and rush to the front line without hesitation." Kang Bin said that at the age of 45, he is an old railway passer-by. He has been working for 23 years, and he can’t remember how many New Year’s Eve years he hasn’t been at home. Originally, he took a break on the 23rd. Because of special circumstances, he arrived at his post early at 23: 00 on the 22nd, and together with his colleagues, he went all out to do a good job in epidemic prevention and control.

"On New Year’s Eve this year, another group of colleagues spent it together." Kang Bin said that this year, colleagues agreed that everyone would bring a dish and have a "hundred-family banquet" together.

Upstream News chongqing morning post Reporter Li Jing Intern Liu Yanqiu Photography hujie

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　　Cctv news: It’s the weekend again! What important policies did the country release this week? How will it affect your life? Xiaobian takes you back to see one by one!

　　In 2030, healthy China will be like this!

　　The Central Committee of the Communist Party of China and the State Council recently issued the "Planning Outline of Healthy China 2030",By 2030, China’s main health indicators will enter the ranks of high-income countries, and the average life expectancy will increase by about 3 years from the current level, reaching 79 years.

　　As a grand blueprint and action plan to promote the construction of a healthy China, the outline defines the goal of building a healthy China: by 2020, a basic medical and health system with China characteristics covering urban and rural residents will be established, the level of health literacy will continue to improve, the health service system will be perfect and efficient, and everyone will enjoy basic medical and health services and basic sports and fitness services, basically forming a healthy industrial system with rich connotations and reasonable structure, and the main health indicators will be in the forefront of middle-and high-income countries.

　　Pensions are really coming into the market!

　　On the morning of October 25th, Ministry of Human Resources and Social Security held a press conference, and Jong Li, a press spokesman, revealed the new progress of pension entering the market. Jong Li said that it will start the investment and operation of pension funds, organize the first batch of entrusted provinces to sign contracts with the Social Security Fund, and announce the first batch of pension fund management institutions.

　　Jong Li said that the Ministry of Human Resources and Social Security has implemented the Measures for the Administration of Investment in Basic Endowment Insurance Funds, and has set up a working group with relevant departments to formulate relevant plans.

　　"At present, some provinces have formulated specific plans and formed plans for entrusted investment. The next step will be to organize the first batch of entrusted provinces to sign contracts with the Social Security Fund Council during the year. At the same time, the Social Security Fund Council will take the lead in organizing the review Committee, select the first batch of pension fund management institutions, and officially start the investment operation. " Jong Li said that under the premise of ensuring safety, the life-saving money of ordinary people will be truly preserved and increased.

　　China Banking Regulatory Commission speaks to the property market: strictly control the risks of real estate financial business.

　　On October 22nd, official website of China Banking Regulatory Commission released the contents of the third quarter economic and financial situation analysis meeting of China Banking Regulatory Commission.

　　The meeting proposed that banking financial institutions should continuously improve the level of risk management and effectively resolve the credit risk in the overcapacity field; Strictly control the risks of real estate finance business, strictly implement the regulatory requirements and policies of real estate loan business, prudently carry out the business related to real estate agents and housing enterprises, standardize the management of various loan businesses, strictly prohibit the illegal distribution or misappropriation of credit funds into the real estate sector, strengthen the investment management of wealth management funds, strictly prohibit bank wealth management funds from illegally entering the real estate sector, and strengthen the compliance operation of real estate trust business; Strengthen the management of liquidity risk, strengthen the management of inter-bank, wealth management and investment, and reasonably match the term structure of assets and liabilities; And prevent external risks from spreading to the banking industry.

　　9 provinces and cities college entrance examination registration time determined

　　It is reported that nine provinces and cities including Beijing, Jiangsu and Anhui have announced the registration time for the 2017 college entrance examination. Judging from the announcement, the registration time for the college entrance examination is mainly concentrated in November. See the specific stamp map ↓ ↓

　　Fares for routes below 800 kilometers will be liberalized, and there will be more special short-distance air tickets.

　　The Notice on Deepening the Reform of Domestic Air Passenger Transport Fares in Civil Aviation issued by the Civil Aviation Administration of China and the National Development and Reform Commission (hereinafter referred to as the Notice) will be implemented on November 1, and the notice requires to further expand the range of market-regulated routes, and the passenger transport fares for routes below 800 kilometers and above 800 kilometers that compete with high-speed EMU trains shall be independently set by airlines according to law.

　　At the same time, the notice stipulates that the specific fare types, levels and applicable conditions for airlines to formulate and adjust market-adjusted price routes should be announced to the public at least 7 days in advance. On the basis of full fare, the cumulative fare increase of airlines on each route shall not exceed 10%, and no more than 10 fare increase routes shall be allowed in each season.

　　Samsung Note7 can’t get on the plane!

　　On October 26th, official website of the Civil Aviation Administration issued an announcement: In order to ensure the safety of air transportation, from October 27th, 2016, the Civil Aviation Administration prohibited passengers and crew members from carrying Samsung Galaxy Note 7 mobile phones with them or in their hand luggage; It is strictly forbidden to put the Samsung Galaxy Note 7 mobile phone into the consignment luggage; It is strictly forbidden to collect and transport Samsung Galaxy Note 7 mobile phones as air cargo.

　　The Civil Aviation Administration requires airlines, their ground service agents and air sales agents to fulfill the obligation of informing the above provisions in the aspects of ticket sales, check-in procedures and cargo collection and transportation. Those who violate the above provisions will be severely dealt with by public security organs and civil aviation administrative organs according to the circumstances and relevant state laws and regulations.

　　A number of enterprises signed an anti-"speculation" agreement and "swipe the bill" will be cancelled.

　　On October 25th, the signing ceremony of the anti-speculation information sharing agreement was held in the National Development and Reform Commission. Representatives from eight enterprises, including Alibaba, Tencent, JD.COM, 58 Tongcheng, Didi Kuaidi, Baidu, Qihoo 360 and SF, signed an anti-speculation information sharing agreement.

　　When shopping online, people often refer to the credit rating or users’ evaluation of merchants. Merchants with high credit rating and high praise will undoubtedly gather higher popularity. "Speculation of letters" is the use of various ways and means to conduct suspected false transactions, speculation of credit and other acts.

　　Under the framework of Anti-speculation Information Sharing Agreement, a blacklist of "speculation letters" will be established and regularly shared, which will be pushed to enterprises, law enforcement departments and other units to jointly punish the organizers of "speculation letters". Penalties mainly include restricting newly established accounts, shielding or deleting existing accounts, restricting the release of goods and services, restricting participation in various marketing or promotional activities, deducting credit points, and lowering credit rating.

　　The State Administration for Industry and Commerce carries out supervision and law enforcement in key areas of online consumer rights protection.

　　The State Administration for Industry and Commerce recently announced that it will take about three years to carry out supervision and law enforcement in key areas of online consumer rights protection, effectively curb infringement and counterfeiting in the Internet field, and further improve the level of online consumer rights protection. In the future, online shopping rights protection will be easier.

　　The State Administration for Industry and Commerce requires that the quality sampling inspection of online commodities be included in the annual sampling inspection plans of various places and make overall arrangements. Highlight key commodities such as digital electronics and household appliances that are hot-selling online and consumers have concentrated their problems, and carry out targeted sampling inspection of online commodities. At the same time, supervision should adhere to the problem orientation, investigate and deal with illegal cases of online commodity quality according to law, increase the punishment for illegal acts of online commodity operators selling unqualified commodities, and order them to immediately stop selling and delete illegal commodity information.

　　It involves commodities that endanger personal and property safety and do not meet mandatory standards, and at the same time requires the relevant online trading platform providers to immediately block illegal shops or commodity information and stop providing trading platform services for related commodities.

　　The method for identifying destitute people is announced: the aid and support system is more open.

　　The Ministry of Civil Affairs recently promulgated the "Measures for the Identification of Extremely Poor Persons". The method focuses on the identification conditions, identification procedures, and evaluation criteria for the self-care ability of poor people. In terms of identification conditions, the method clarifies the "three noes" applicable to the identification of extremely poor people, that is, no ability to work, no source of income, no fixed maintenance, maintenance, and the inability of the maintenance obligor or its legal obligor to perform its obligations.

　　The method is clear. If the total income is lower than the local minimum living standard, and the property conforms to the provisions on the property status of local destitute personnel, it shall be deemed as "no source of income" as mentioned in these Measures. In terms of the identification procedure, the method refers to the minimum living security review and approval method, and refines the work requirements of the application, acceptance, review and approval of assistance and support for poor people.

　　Five ministries and commissions issued a document to strengthen basic medical and health care services throughout childbirth.

　　Five ministries and commissions, including the National Health and Family Planning Commission, recently issued "Several Opinions on Strengthening Basic Medical and Health Care Services in the Whole Birth Period". The Opinions pointed out that it is necessary to adjust and expand maternal and child health service resources as soon as possible, actively promote the sinking of high-quality maternal and child health service resources, focus on improving the ability of pregnant women and newborns to treat critical illness, comprehensively strengthen the training and use of urgently needed professionals, and strive to solve the contradiction between supply and demand of maternal and child health service resources in the early period of the 13 th Five-Year Plan, and strive to increase the number of obstetricians and midwives by 140,000 during the 13 th Five-Year Plan period.