关键词: 锂离子电池, Li-Ni-Co-Mn-O, 共沉淀, 颗粒过程, 热力学, 工艺参数

Abstract: Due to its low cost and high capacity，layered Li-Ni-Co-Mn-O has already been industrialized and partially replaced traditional LiCoO2 as cathode material for commercial lithium-ion battery. Among various synthetic methods for Li-Ni-Co-Mn-O，co-precipitation becomes an attractive choice because of its low cost and stability. In this paper，we qualitatively analyzed the particulate and thermodynamic processes of co-precipitation method. Then influences of process parameters (aging time，temperature，pH value，etc) on the structure and performance of product were discussed in detail. The ranges of certain process parameters were confirmed according to statistics and the analyses conducted before. The concept of effective feeding rate was put forward，with which a series of variables were derived for a complete description of feeding process. Further researches on the synthesis of primary particles with preferred orientation and the investigation of appropriate fluid environment for co-precipitation should be conducted in the future.

Key words: lithium-ion battery, Li-Ni-Co-Mn-O, co-precipitation, particulate processes, thermodynamics, process parameters