锂离子电池正极材料循环稳定性的基因规律

杨民安, 陈宁, 王博, 张乾, 陈敬沛, 赵海雷, 李福燊

Gene law about cycle stability of cathode material for lithium-ion batteries

Min'an YANG, Ning CHEN, Bo WANG, Qian ZHANG, Jingpei CHEN, Hailei ZHAO, Fushen LI

表1 18种正极材料的容量保持率、脱锂前后的晶胞体积，弹性模量，脱锂系数和收缩压强

Table 1 Capacity retention rate, cell volume and elastic modulus before and after lithium loss, coefficient of lithium loss and compaction pressure of 18 cathode materials

体系 化学式 容量保持率/% V1/?3 V2/?3 B1/GPa B2/GPa 脱锂系数 p/GPa 参考文献 层状 LiCoO2 90.64 240.01 180.04 154.08 205.62 0.5 14.96 [15-17] LiNiO2 82.85 225.53 166.25 175.43 238.47 0.5 17.43 [18-21] LiMnO2 79.14 167.95 134.50 158.68 198.64 0.5 13.32 [22-23] 橄榄石 LiFePO4 91.95 366.38 321.03 300.34 58.73 1 17.72 [24-27] LiCoPO4 9.40 253.87 239.93 103.89 258.15 0.75 0.83 [28-31] LiNiPO4 30.00 320.77 317.45 394.61 96.36 0.75 9.88 [32] LiMnPO4 48.19 217.56 210.61 296.86 359.57 0.75 13.11 [33-34] 尖晶石 LiMn2O4 78.78 251.95 238.13 266.86 255.57 0.75 15.96 [35-37] 硅酸盐 Li2FeSiO4 81.16 135.82 126.34 81.33 196.25 0.5 6.88 [38] Li2MnSiO4 17.61 367.10 288.23 55.70 108.39 0.5 4.45 [39-40] Li2NiSiO4 86.76 195.59 159.88 81.68 67.12 0.5 8.34 [38] 硼酸盐 LiFeBO3 83.19 363.76 287.80 168.19 84.58 0.75 13.60 [41] LiMnBO3 38.07 341.00 308.66 177.15 126.61 0.33 6.50 [42] LiCoBO3 48.98 346.20 312.96 205.00 137.44 0.25 5.29 [43-44] 其他 Li3V2(PO4)3 69.70 322.00 292.21 188.04 162.17 0.667 2.24 [45-48] Li2FeP2O7 78.38 785.47 772.58 162.50 155.07 0.5 5.20 [49] LiVOPO4 93.19 242.10 228.20 165.67 127.69 0.75 2.58 [50-53] Li4V3O8 77.74 327.57 320.94 48.11 157.41 0.75 3.90 [54-55]