The separator has the advantages of excellent high temperature resistance, excellent flame retardant performance, good electrolyte infiltration, and the like, greatly improving the rate performance and safe use performance of the lithium battery, and exhibiting in the third-party evaluation of the Nano Strategic Leading Organization of the Chinese Academy of Sciences. The excellent high-voltage performance was highly evaluated by the project's chief scientist.
With the development of technology, electric vehicles have imposed higher requirements on power lithium batteries in terms of high power output and safety performance. Diaphragm electrolyte system is one of the bottleneck problems restricting the rapid development of power lithium batteries. The development of high-safety diaphragms and new polymer electrolyte systems is crucial for improving the overall performance of power lithium-ion batteries. Dr. Cui Guanglei, Executive Director of the Qingdao Energy Storage Research Institute, led researchers to successfully develop high-security and high-voltage-resistant power lithium battery separators using technologies such as wet-process papermaking, interface coupling, and functional modification with completely independent intellectual property rights.
Traditional liquid lithium-ion batteries use flammable carbonate solvents and polyolefin separators, which present a great safety risk. The researcher has successfully developed a rigid, flexible and all-solid-state polymer electrolyte by using self-developed flame-retardant cellulose as a substrate, through functional modification and coupling and other related processes. Compared with the traditional polyethylene oxide pure solid polymer electrolyte, the all-solid polymer electrolyte has a higher mechanical strength (45MPa) and a wider electrochemical window, excellent rate charge and discharge performance (10C) and more The wide temperature range (25°C~160°C) has broad application prospects and industrial value. At present, Qingdao Energy Storage Institute is optimizing the process parameters of all-solid-state polymer lithium batteries and strives to take the lead in realizing industrial demonstration on economical electric vehicles.
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