High-performance lithium-ion battery cathode materials are the bottleneck limiting the development of next-generation high-energy-density lithium-ion batteries. Therefore, the development of long-cycle, high-magnification lithium-ion battery cathode material city is one of the current research hotspots. The layered lithium-rich manganese-based positive electrode material has many advantages, such as high specific capacity, low cost, environmental friendliness, etc., but this material also has great defects such as poor cycle performance, poor rate performance, poor conductivity, and severe voltage. Drop the problem and so on. At present, the research on lithium-rich manganese-based materials mainly focuses on improving the cycle performance, rate performance and voltage drop of materials. In recent years, research results of lithium-rich manganese-based batteries by major battery manufacturers have advanced by leaps and bounds.
On November 22, it was learned from the website of the Ministry of Science and Technology that with the support of the national key R&D plan, the team of Professor Xia Dingguo of Peking University broke through the doping, coating and nano-shape in the research of new high-energy manganese-based cathode materials. A lithium-rich manganese-based power battery cathode material with O2 configuration was prepared by combining LiMO2 phase with single-layer Li2MnO3.
It is reported that this cathode material has a specific discharge capacity of 400 mAh/g or more and a specific energy density of more than 1380 Wh/kg, which provides a possibility to develop a new type of lithium ion battery with a specific energy of more than 500 Wh/kg, which has been reported at home and abroad. Lithium-ion battery-rich cathode material for lithium ion batteries with the highest specific energy density.