Qian Yitai, Academician of the Chinese Academy of Sciences: Research and industrialization analysis of high-safety water-based secondary batteries

ABEC 2020│The 8th Battery \"Davos\" Forum Site

Battery \"Davos\"-Battery Network News on October 27th (Chen Yu Zhang Qian, Changsha Ningxiang live photo and text)On October 27-29, the annual global battery industry event-ABEC 2020 | The 8th China (Changsha·Ningxiang) International Battery New Energy Industry Summit Forum was grandly held in Changsha Ningxiang. This forum is hosted by the ABEC (Battery \"Davos\") Organizing Committee, Zhongguancun New Battery Technology Innovation Alliance, and is exclusively co-organized by Ningxiang High-tech Zone. More than 500 people from the global battery new energy industry chain \"government, industry\" Representatives from all walks of life, including science, education, research, finance, service, and use, as well as the media attended the event. Under the background of global competition in battery new energy, they explored the upward path of independent brands and discussed the construction of the industrial healthy ecological chain.

During the same period of the forum, the 2020 Hunan (Changsha) Battery Industry Expo, sponsored by the Hunan Provincial Department of Industry and Information Technology, Hunan Provincial Department of Commerce, and Changsha Municipal People’s Government, was grandly opened with an exhibition area of ​​20,000 square meters, focusing on cutting-edge industrial products, technologies, and services. Bringing together BYD, BAIC New Energy, Chery New Energy, Lishen Battery, Vision Group, Xinwangda, Electric General, Zhongke Star City, Huabao Energy Storage, Polyfluoride, Shida Shenghua, Jin Yinhe, Han's Laser, Austrian Nearly 200 high-quality exhibitors in the battery new energy industry chain, such as Tewei and Wuxing Aluminum.

Academician of Chinese Academy of Sciences/Professor of University of Science and Technology of China and Shandong University Qian Yitai

On the morning of the 27th, Qian Yitai gave a keynote speech at the forum entitled \"Research and Industrialization of High-Safety Aqueous Secondary Batteries\", sharing basic research on water-based ion batteries, pilot-scale research on water-based ion batteries, and development of water-based ion batteries Prospects, etc., battery network has selected some of its wonderful views, for readers:

Qian Yitai said that lithium-ion batteries have made significant progress in power batteries, but organic electrolytes have potential safety hazards. The application of electric bicycles and energy storage still needs further research. Water-based ion batteries are highly safe, and water-based metal oxide batteries can further increase energy density. Water-based zinc-ion batteries are beneficial to inhibit the growth of dendrites and are expected to gradually replace lead-acid batteries.

\"In the past six years, the green water-based secondary battery we developed has successfully invested 20 million yuan in research and development funds based on the button battery in the article, magnified 100,000 times to achieve pilot testing, and successfully prepared a practical secondary battery that can drive electric bicycles. Using 30km, the energy density of the battery is 50wh/kg, which is higher than that of lead-acid batteries (35wh/kg). \"Qian Yitai introduced, the water-based battery developed by his team has a cycle life of up to 500 times, and the cost is about 0.6 yuan/watt-hour , Used in electric bicycles, running speeds up to 30km, in the future, we will strive to cycle more than 1,000 times, so that the battery does not need to be replaced, and the life of the entire bicycle battery is the same as that of a bicycle.

In addition, Qian Yitai is optimistic that large-scale energy storage systems have huge market application prospects: \"The energy storage system can adjust the peak power supply of the grid; reduce peak electricity charges by cutting peaks and filling valleys; and can also supplement intermittent power grids through it. Power supply, increasing the proportion of renewable energy in the grid. At present, this application market is growing rapidly.\"

Qian Yitai concluded that the future development goal of high-safety water-based secondary batteries is to increase the energy density of lithium manganate/zinc-doped sodium titanium phosphate batteries to 70 Wh/kg, with a cycle life of more than 500 times, which can be applied Electric bicycles and hybrid vehicles are further used for military special purposes; the cycle life of lithium manganate/sodium titanium phosphate battery system is increased to more than 3000 times for energy storage.