Research Progress on the Modification of Lithium Nickel-cobalt-Manganate Ternary Cathode Materials
Cathode materials determine the specific capacity,cycle life and safety of lithium-ion battery to a large extent.Lithium nickel-cobalt-manganate(NCM)ternary cathode materials have attracted more attention due to their high energy density,low cost and relative safety.However,the issues such as cation mixing,interfacial side reactions and irreversible phase transition severely impact the battery's cycling and rate performance.In this paper,the structural characteristics and the problem genesis of NCM cathode materials were reviewed.Furthermore,the modification research progresses of doping,surface coating,single crystal and concentration gradient structure of the materials were discussed.Further research directions were also anticipated.
Lithium-ion batteriesTernary cathode materialLithium nickel-cobalt-manganateDoping and coatingStructural design
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