Driven by both policies and the market, power batteries will inevitably develop in the direction of high energy density, high cycle performance, and high safety performance. This requires research institutions and enterprises to make improvements in cathode materials, anode materials, and electrolytes.

　　Thanks to the development of new energy vehicles, power batteries are at the forefront of rapid development, and the development of new energy vehicles has continuously put forward higher requirements for the performance of power batteries. The "Action Plan for Promoting the Development of the Automotive Power Battery Industry" puts forward, By 2020, the specific energy of the new lithium-ion power battery cell will exceed 300wh/Kg, and by 2025, the specific energy of the power battery cell of the new system will reach 500wh/Kg.

　　Under the dual drive of policy and market, power batteries will inevitably develop in the direction of high energy density, high cycle performance, and high safety performance. This requires research institutions and enterprises to make improvements in cathode materials, anode materials, and electrolytes. Solid-state batteries, silicon-carbon anodes, high-nickel ternary materials, and lithium-rich manganese anodes are considered to be the mainstream technology routes developed by enterprises in recent years.

　　Lithium-rich manganese-based cathode: an ideal material with less precious metal content

　　The technical goal to be achieved by a single cell in 2025 is a specific energy of 400Wh/kg. The development of more efficient and energy-saving new cathode materials to overcome and replace the existing defective cathode materials has become a research hotspot. Among the known cathode materials, the specific discharge capacity of lithium-rich manganese-based cathode materials is more than 250 mAh/g, which is almost twice the actual capacity of the current commercial cathode materials. At the same time, this material uses the cheaper manganese element. Mainly, the content of precious metals is small, compared with the commonly used lithium cobalt oxide and nickel-cobalt-manganese ternary cathode materials, not only the cost is low, but also the safety is good. Therefore, lithium-rich manganese-based cathode materials are regarded as ideal materials for the next generation of lithium power batteries.

　　How long will it take to achieve 500wh/Kg? Overview of the development trend of lithium battery material technology

　　Many companies, including Dangsheng Technology, Jiangte Electric, and AVIC Lithium, are stepping up research and development of lithium-rich manganese-based cathode materials. The Institute of Physics of the Chinese Academy of Sciences has improved the voltage attenuation of lithium-rich manganese-based cathode cycles, reaching the target of reducing the voltage attenuation to less than 2% after 100 weeks, and has made significant progress. For the first time, a team from Peking University has developed a lithium-rich manganese-based positive electrode with a specific capacity of 400mAh/g, which can reach the target of 400Wh/kg.

　　At present, the full application of lithium-rich manganese-based cathodes still has technical problems such as reducing the first irreversible capacity loss, improving the rate performance and cycle life, and suppressing the voltage attenuation in the cycle process that need to be resolved.