锂离子电池产气机制及基于电解液的抑制策略

徐冲, 徐宁, 蒋志敏, 李中凯, 胡洋, 严红, 马国强

Mechanisms of gas evolution and suppressing strategies based on the electrolyte in lithium-ion batteries

Chong XU, Ning XU, Zhimin JIANG, Zhongkai LI, Yang HU, Hong YAN, Guoqiang MA

图1 (a), (b) 正极表面R-H+ 扩散至负极产生H2 的机制以及温度和电压对H2 产生的影响[25]；(c) 溶剂分解产生H2 的“双穿梭-双催化”机制[38]；(d) 锂化石墨负极表面锂枝晶与PVDF反应生成H2 的机制[24]

Fig. 1 (a), (b) Schematic for the diffusion of R-H+ from cathode to anode and the effect of temperature and voltage on the evolution of H2[25]; (c) Generation of H2 by a "double crossover-double catalysis" process during solvent decomposition[38] and (d) through chemical reaction between PVDF and Li dendrites on lithiated graphite anode[24]