三元正极材料与无机固态电解质复合正极材料的研究进展

Research progress on ternary cathode material and inorganic solid electrolyte composite cathode material

锂离子电池用镍钴锰三元正极材料由于能量密度高、循环性能好而备受市场青睐,但其存在表面残碱高、安全性能差的缺点。无机固态电解质具有高离子电导率、高结构稳定性的特点。将三元正极材料与无机固态电解质材料复合,可有效解决镍钴锰三元正极材料的问题。简要介绍了三元正极材料分别与NASICON型、石榴石型、LISICON型、β-锂霞石型和硫化物型无机固态电解质复合的案例,综述了现阶段的研究进展,并展望了其未来应用过程中的挑战与发展趋势。

Nickel-cobalt-manganese ternary cathode materials were favored by the market due to the advantages of high energy density and excellent cycling performance.However,the disadvantages of high residual alkali on the surface and poor safety performance have caused consumers to linger.Inorganic solid electrolyte has the characteristics of high ionic conductivity and high structural stability,so it will be very attractive in all solid-state batteries in the future.In the next few years,lithium-ion secondary batteries with traditional structures will also occupy most of the battery market share.The solution of compounding the ternary cathode material with the inorganic solid electrolyte material is a nice option.Some cases of compounding ternary cathode materials with five types of inorganic solid electrolytes were briefly introduced such as typical NASICON type,garnet type,LISICON type,β-eucryptite type,and sulfide type.And the current research was reviewed.Challenges and trends in the future application process as well were talked.