At present, the range of electric vehicles on the market is generally about 500 kilometers, and if it is in the cold winter, this performance will drop by 100-200 kilometers. Short cruising range has become a major factor restricting consumers from buying electric vehicles. If the cruising range is increased to 1,000 kilometers, then more consumers will inevitably choose electric vehicles.
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According to the Ningbo Institute of Materials Technology and Engineering, among the currently known cathode materials, the discharge specific capacity of lithium-rich manganese-based cathode materials is as high as 300mAh/g, which is the current commercial application of lithium iron phosphate and ternary materials. About twice the capacity.
In other words, the lithium-rich manganese-based cathode material is considered to be the ideal choice for a new generation of high-energy density power lithium batteries, and it is the key to the technology for the energy density of power lithium batteries to exceed 400Wh/kg.
The team of Liu Zhaoping, a researcher at the Power Lithium Battery Engineering Laboratory, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, has long been committed to the research and development of lithium-rich manganese-based cathode materials. Recently, the team has made a series of progress.
The team used surface modification methods such as surface doping, gas-solid interface modification, and surface coating to achieve the construction of a composite surface structure and prepare a lithium-rich manganese-based cathode material with high specific capacity and long cycle stability.
The research team used the lithium-rich manganese-based cathode material and graphene composite silicon-carbon anode material to design and develop a new battery with an energy density of 345Wh/kg (capacity 20Ah), and the battery exhibits excellent cycle stability.
However, it needs to be pointed out that the battery is still some distance away from mass production, but it precisely points out one of the development directions of power batteries in the future, so it is not far from the era when the cruising range of electric vehicles can easily exceed 1,000.
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