High-energy-power lithium-ion battery has made a phased progress

According to the news of the Ministry of Science and Technology on the 19th, under the support of the national key research and development program “New Energy Vehicle”, the project “Leading High Energy Power Lithium Ion Battery R&D and Integration Application” led by Hefei Guoxuan Hi-Tech Power Co., Ltd. Progress was made in stages and battery cell samples with energy densities of 281 Wh/kg and 302 Wh/kg were developed.

The project team focused on the development of high-specific energy, high-safety, long-life power batteries, and conducted simulations of battery models to develop new cathode materials, silicon-based anode materials, and high-safety electrolytes from the perspective of material system matching and cell design processes. In-depth research and technical research. At present, the use of high-nickel cathode material matching silicon-based anode material to achieve a single cell energy density of 281Wh/kg, 1C rate charge and discharge room temperature cycle 350 times to maintain 80%; using lithium-rich cathode material matching silicon-based anode material to achieve single cell The energy density is up to 302Wh/kg, and 0.5C times the room temperature is released and the room temperature is maintained at 80% for 195 times. The project has broken through the material system matching technology of high specific energy cells, pole piece processing and preparation technologies, and environmental control technologies. It has made remarkable achievements in the design of core pole pieces, process technology of the core preparation process, and performance and safety performance tests. Formed a standardized operation flow and development platform for high-specific energy battery development. The research results of the project will be gradually expanded and applied to the research and development of various types of power battery products, providing a key basis for the development of high specific energy and high safety lithium ion batteries in China.

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