Lithium into lithium battery research and development of new directions

September 02, 2021

Lithium battery has one more research direction. Wu Yuping, a professor at Fudan University's New Energy and Materials Laboratory, said that at present, lithium-ion batteries have made analog batteries, but their capacity is still small.

General smartphone battery capacity is 1000 mAh, the current development of lithium only a few milliamperes, it belongs to the laboratory research and development stage. However, Wu Yu-ping pointed out that if there are companies willing to invest, 35 years is expected to mass production.

According to reports, Wu Yuping group led by the composite film metal lithium coating, placed in neutral pH aqueous solution, and lithium-ion batteries in the traditional cathode material assembly, made of the average charging voltage of 4.2V, Discharge voltage of 4.0V for the new water lithium.

Water Lithium is one of the frontiers and directions of lithium battery research and development today. The core issue is how to prevent lithium ion and water from reacting at low potential, and ceramic membrane becomes the key technology. In theory, water, lithium, high energy density, energy efficiency up to 95%, equipped with water, lithium electric vehicles at full power running distance of up to 400 km, while the charging time is very short. In addition, lithium water in use is not easy to heat, higher safety performance.

It is understood that Fudan University started its exploration in the field of water and lithium electricity in 2005 and made significant progress in 2007 with research achievements and scientific research living in the advanced position in the world.

Analysis, the technology to improve energy density, is expected to solve the current high cost of electric vehicles batteries, battery life is short, charging a long time and other issues. However, the technology research and development currently only achieved a breakthrough in principle, has been verified in the laboratory, and the current development of the battery capacity is too small, only the successful development of large-capacity battery has substantive significance.

According to the website of the Ministry of Science and Technology announced in early July, the "Technical Development of Functional Separators for High-Safety Power Battery" jointly supported by Xiamen University and CATIC Lithium (Luoyang) Co., Ltd. and supported by National High-Tech Research and Development Program (863 Program) A major breakthrough.

China National Aviation Li & C into integrated subsidiary, the beginning of 2012 cast a ceramic functional membrane technology industry pilot line, with a total investment of 10 million yuan. As of June 2013, the test line has been initially completed to complete the formulation of curing, co-paste, coating, cutting technology development, the formation of an annual output of 3 million square meters of ceramic functional diaphragm production capacity. On this basis, the ceramic diaphragm battery design, trial production and testing, has developed four different specifications of the functional membrane products, including a series of products in a variety of metal shell batteries put into use. Air China plans to use self-produced lithium batteries for its own battery production to improve battery safety.

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