Preparation,Electrochemical Reaction and Research Progress of Ternary Nickel-cobalt-manganate Lithium
The extensive use of fossil energy has caused a wide range of environmental problems in the world,and it is urgent to develop new energy technologies.The chemical power supply that is used in circulation can convert electrical energy and chemical energy into each other.Lithium-ion batteries rely on the transfer of lithium ions between the positive and negative terminals of the power supply to achieve charge and discharge process.Because of high operating voltage,small battery size,light battery weight,high battery energy density,and long cycle life,it has been widely concerned.The preparation process of cathode materials for lithium ion batteries includes high temperature solid phase method,sol-gel method,hydrothermal method and solvothermal method.The problems of nickel-cobalt-manganese ternary oxide materials include cationic mixing,irreversible phase transformation and thermal runaway,etc.The solutions include effective control of material structure and morphology,doping and modification.When nickel-cobalt-manganese ternary oxide materials are used as lithium ion cathode materials,the charging and discharging process is similar to that of lithium cobaltate.At present,LiNi1/3Co1/3Mn1/3O2 has been used in cylindrical batteries and power batteries,partly replacing materials such as lithium cobalt oxide.At present,ternary oxide has a very broad application prospect.
lithium-ion batterieslithium nickel-cobalt manganatecharge and dischargesolid phase methodkydrothermal process
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