文献类型：期刊文献

英文题名：Constructing a conductive solid electrolyte interface by adding lithium nitrate into carbonate electrolyte for stable lithium metal anode

作者：Fei, Jiafeng[1];Liu, Honghao[1];Wang, Rongjie[2];Guan, Mengjia[1];Li, Yongsheng[1,2]

机构：[1]East China Univ Sci & Technol, Frontier Sci Ctr Mat Biol & Dynam Chem, Shanghai Engn Res Ctr Hierarch Nanomat,Key Lab Ult, Sch Mat Sci & Engn,Lab Low Dimens Mat Chem, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China

年份：2024

卷号：412

外文期刊名：SOLID STATE IONICS

收录：;EI(收录号：20242016098804);WOS:【SCI-EXPANDED(收录号:WOS:001346247400001)】；

语种：英文

外文关键词：lithium dendrite; Electrolyte additive; lithium metal anode; Robust SEI; Carbonate electrolyte

摘要：Regulating the solid electrolyte interface (SEI) components through additives could improve uncontrollable lithium dendrites and unstable electrode/electrolyte interface, which hinder the practical application of lithium metal batteries (LMBs). In this work, the solubilization of lithium nitrate (LiNO3), whose reduction decomposition at the anode can promote dense Li deposition and robust N-rich SEI, was achieved in an ester-based electrolyte by using diglyme (G2) as a carrier solvent. Benefitting from the uniform Li deposition and stable SEI layer, the modified electrolyte exhibited a high Coulombic efficiency of 98% over 330 cycles, and demonstrated superb cycling stability for >1000 h in the Li||Li symmetric cell. In addition, the practical Li||LiFePO4 full cell manifested excellent cycling and rate performances with a high capacity retention of 94% after 400 cycles. Even under a high current density of 5C, the cells exhibited a remarkble average discharge specific capacity of 68.8 mAh g(-1) over 300 cycles, and a reversible capacity of 152.2 mAh g(-1) was attained with negligible capacity loss when the rate went back to 1C. This study offered a straightforward and economical method to regulate SEI components and suppress lithium dendrites by rational electrolyte modification.