电解质
电化学窗口
溶剂化
化学
电化学
无机化学
离子液体
电导率
盐(化学)
离子电导率
溶剂
金属
锂(药物)
电池(电)
化学工程
电极
有机化学
物理化学
催化作用
热力学
内分泌学
工程类
物理
功率(物理)
医学
作者
Xianjiao Meng,Jian Qin,Yutao Liu,Zitong Liu,Zhiping Song,Zhiping Song,Hui Zhan
标识
DOI:10.1016/j.cej.2023.142913
摘要
Lithium metal battery (LMB) always faces a huge challenge at low temperature due to the sluggish reaction kinetics. An effective electrolyte could well tackle the issues as it much determines the Li+ de-solvation behavior and solid electrolyte interface (SEI) formation, and further greatly influenced the Li deposition. A practicable and cost-effective electrolyte was proposed in this work which sophisticatedly handled the balance between the ion-transfer character, Li solvation and SEI requirement. Highly fluent methyl acetate (MA) and SEI-beneficial fluoroethylene carbonate (FEC) together with Li salt constituted an anti-freezing electrolyte with sufficient ion-conductivity. More importantly, appropriate coordination between salt and solvent facilitated the de-solvation stage in Li+-reduction, additionally, the dual salt of lithium bis(fluorosulfonyl)imide (LiFSI) and lithium difluoro(oxalate)borate (LiODFB) combining with LiNO3 additive endowed the electrolyte with wide electrochemical window and Al compatibility. With them, repetitive Li striping/plating was achieved at −40 °C, and Li/LiNi0.5Co0.2Mn0.3O2 (NCM) full cell could be stably cycled for more than 150 times.
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