高镍三元层状锂离子电池正极材料：研究进展、挑战及改善策略

栗志展, 秦金磊, 梁嘉宁, 李峥嵘, 王瑞, 王得丽

High-nickel ternary layered cathode materials for lithium-ion batteries： Research progress， challenges and improvement strategies

Zhizhan LI, Jinlei QIN, Jianing LIANG, Zhengrong LI, Rui WANG, Deli WANG

图9 (a) 单晶与多晶NCM颗粒裂纹示意图[100]；(b) 单晶与多晶NCM循环600圈前后的横截面SEM图；(c) 多晶NCM和单晶NCM正极长循环期间的裂纹发展和内部结构变化示意图；(d) 多晶和单晶NCM在纽扣电池中的循环性能对比[103]

Fig. 9 (a) Schematic illustration of particle fracture in polycrystalline and single-crystal NCM materials[100]; SEM images of sintered SC-NCM; (b) Cross-sectional SEM images of single crystal and polycrystal NCM before and after 600 cycles; (c) Schematic illustration of crack evolution and the internal morphological difference for polycrystalline and single-crystal NCM cathodes during prolong cycling; (d) Cycling performance of polycrystalline and single-crystal NCM cathodes a coin-cell[103]