
0 引言
1 容量衰减机理概括
1.1 体积变化导致微裂纹
1.2 石墨化度降低
Fig. 5 (a) Discharge capacity vs. cycle number with different electrolyte additives, (b) 1 mol/L LiPF6 dissolved in PC/MEC (3/7, v/v) without additive; (c) 1 mol/L LiPF6 dissolved in PC/MEC (3/7, v/v) + 2% VA [45]图5 (a)石墨材料在具有不同添加剂电解液中的循环性能;(b)无任何添加剂的1 mol/L LiPF6 PC/MEC(体积比为3/7)电解液;(c)添加2%VA的1 mol/L LiPF6 PC/MEC(体积比为3/7)电解液[45] |