Development of the Electrolyte for Ni≥90 High Energy Density System
With the gradual replacement of traditional fuel vehicles with new energy vehicles,lithium iron phosphate battery with low cost,high stability advantages to occupy the majority of the market,but the other side of the double-edged sword is also plagued by the market at the same time,its low-temperature working environment"dormant"and lower energy density so that lithium ions have to look for a better host.After bumping into the wall of lithium nickel(LiNO2),lithium manganate(LiMnO2)and lithium cobalt(LiCoO2)three systems.Surprised to find that nickel and cobalt and manganese three neighboring elements in the same cycle can make up for each other shortcomings,mixed preparation of LiNixCoyMn1-x-yO2 ternary cathode materials with low cost,high discharge capacity,structure and electrochemical stability and other advantages of the first choice for high-end models.Nowadays,in order to further improve the energy,the Ni ratio is increased(Ni≥90),which leads to serious lithium-nickel mixing and discharging and a decrease in structural stability.In this paper,we will modify the anode and cathode surface through the multiple effects of functional additives to maintain the structural stability of the material,so that the NCM cathode material can maintain excellent electrochemical performance in the high energy density system.
NCM cathodehigh energy densityLi-ion battery electrolyteSEI/CEI Additive
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