金属锂
材料科学
磺胺
锂(药物)
电解质
溶剂
金属
无机化学
组合化学
有机化学
电极
化学
冶金
医学
物理化学
内分泌学
作者
Saehun Kim,Ji Hwan Jeon,Kyobin Park,Seong Hyeon Kweon,Jae‐Hwan Hyun,Chaeeun Song,Dong-Hyun Lee,Gawon Song,Seungho Yu,Tae Kyung Lee,Sang Kyu Kwak,Kyu Tae Lee,Sung You Hong,Nam‐Soon Choi
标识
DOI:10.1002/adma.202401615
摘要
Considering practical viability, Li-metal battery electrolytes should be formulated by tuning solvent composition similar to electrolyte systems for Li-ion batteries to enable the facile salt-dissociation, ion-conduction, and introduction of sacrificial additives for building stable electrode-electrolyte interfaces. Although 1,2-dimethoxyethane with a high-donor number enables the implementation of ionic compounds as effective interface modifiers, its ubiquitous usage is limited by its low-oxidation durability and high-volatility. Regulation of the solvation structure and construction of well-structured interfacial layers ensure the potential strength of electrolytes in both Li-metal and LiNi0.8 Co0.1 Mn0.1 O2 (NCM811). This study reports the build-up of multilayer solid-electrolyte interphase by utilizing different electron-accepting tendencies of lithium difluoro(bisoxalato) phosphate (LiDFBP), lithium nitrate, and synthetic 1-((trifluoromethyl)sulfonyl)piperidine. Furthermore, a well-structured cathode-electrolyte interface from LiDFBP effectively addresses the issues with NCM811. The developed electrolyte based on a framework of highly- and weakly-solvating solvents with interface modifiers enables the operation of Li|NCM811 cells with a high areal capacity cathode (4.3 mAh cm-2 ) at 4.4 V versus Li/Li+ .
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