锂金属电池电解液组分调控的研究进展

冯建文, 胡时光, 韩　兵, 肖映林, 邓永红, 王朝阳

Research progress of electrolyte optimization for lithium metal batteries

Jianwen FENG, Shiguang HU, Bing HAN, Yinglin XIAO, Yonghong DENG, Chaoyang WANG

图8 (a)使用1 mol/L LiTFSI-VC电解液的锂/锂对称电池在5 mA/cm2电流密度和10 mA·h/cm2面容量下，金属锂的镀/脱锂电压曲线[65]；(b) HCE(LiFSI-1.2DME)和LHCE(LiFSI-1.2DME-3TTE)的溶剂化结构[81]；(c)沉积锂的冷冻电镜图像。插图为SEI膜的快速傅里叶变换图(顶部)和能量色散谱(底部)[84]；(d)在1 mol/L LiFSI/DME-TFEO电解液中，锂金属表面形成的单层SEI结构[84]

Fig.8 (a) voltage profiles of lithium-metal plating/stripping in Li|Li symmetrical cell cycled under a current density of 5 mA/cm2 and an areal capacity of 10 mA·h/cm2 with 1 mol/L LiTFSI-VC electrolytes[65]; (b) Scheme of solvation structure in HCE (LiFSI-1.2DME) and LHCE (LiFSI-1.2DME-3TTE) [81]; (c) cryo-EM images of Li deposited on a TEM grid. Inset: corresponding reduced fast Fourier transform (top) and energy dispersive spectroscopy spectra (bottom) of SEI layer[84]; (d) schematic of observed single-layer SEI structure on deposited Li in 1 mol/L LiFSI/DME-TFEO electrolyte[84]