高容量富锂锰基正极材料的研究进展

王俊, 张学全, 刘亚飞, 陈彦彬

Research progress of high capacity Li-Mn-rich cathode materials

Jun WANG, Xuequan ZHANG, Yafei LIU, Yanbin CHEN

表1 富锂锰基正极的改性方法及电化学性能对比

Table 1 Modification methode and electrochemical performance comparsion of LMR cathode materials

Modification method LMR materials Voltagerange Discharge capacity/(mAh/g) Rate capability (1 C/0.1 C)/% Capacity retention/% Voltage retention/% Ref. K+ doping Li1.151K0.013Mn0.552Co0.146Ni0.145O2 2.0-4.8 V 315 @ 0.1 C ～73 82 (2 C, 110cyc. ) — [10] Ti4+ doping Li1.175Ti0.025Mn0.54Co0.13Ni0.13O2 2.0-4.8 V 320 @ 0.1 C ～77 72 (0.2 C, 300cyc.) 83.6 [11] Nb5+ doping Li1.2Mn0.54Ni0.13Co0.13O2 2.0-4.8 V 320 @ 0.1 C ～76 95 (0.1 C, 100cyc.) 94.7 [12] Zr4+ doping Li1.2Mn0.54Ni0.13Co0.13O2 2.0-4.8 V 250 @ 0.1 C ～72 86 (1/3 C, 100cyc.) — [15] AlF3 coating Li1.2Ni0.15Co0.10Mn0.55O2 2.0-4.8 V 250 @ 0.1 C — 94 (1/3 C, 130cyc.) 87.5 [23] N-doped C coating Li1.2Mn0.6Ni0.2O2 2.0-4.8 V 296 @ 0.1 C ～72 (5C/0.25C) 90 (1C, 500cyc.) 84.4 [36] H2SO4 treatment Li1.143Mn0.544Ni0.136Co0.136O2 2.0-4.8 V 287 @ 0.05 C — 99.2 (0.1 C, 50cyc.) 98.5 [30] CO2 treatment Li1.144Mn0.544Ni0.136Co0.136O2 2.0-4.8 V 301 @ 0.05 C 86.2 93.8 (0.5 C, 100cyc.) — [31] O2/O3 hybrid — 2.0-4.8 V 302 @ 0.1 C — 93.4 (0.5 C, 100cyc.) 96.4% [34] Single crystal Li1.2Ni0.2Mn0.6O2 2.0-4.8 V 230 @ 0.1 C 72.2 92 (1 C, 200cyc.) 96.5% [35]