材料科学
环丁砜
电解质
磷酸三甲酯
阴极
盐(化学)
锂(药物)
无机化学
聚丙烯腈
电化学
溶剂
化学工程
乙醚
碳酸丙烯酯
溶剂化
碳酸盐
金属锂
磷酸铁锂
电池(电)
二甲醚
磷酸盐
硝酸锂
化学稳定性
阻燃剂
碳酸二甲酯
稀释剂
碳酸钾
锂电池
电极
作者
Yan Li,Han Zhou,Kai Huang,Xiaoyu Jin,Chaofan Liang,Ji Wu,Fang Zhou,Xiaoqun Qi,Ruining Jiang,Long Qie
标识
DOI:10.1002/aenm.202504263
摘要
Abstract Lithium‐sulfurized polyacrylonitrile (Li||SPAN) batteries call for electrolytes that are simultaneously compatible with both the SPAN cathode and Li metal anode, and the nonflammable and low‐cost nature is also a plus. Whereas, the typical used ether (incompatible with SPAN and flammable), carbonate (incompatible with Li and flammable), or even the recently meticulously f ormulated ones fail to meet all the requirements. Here, a cocktail strategy is proposed to design the electrolyte for Li||SPAN battery. Just like a cocktail consists of multiple components, sulfolane is used as the nonflammable main solvent, fluorine‐contained lithium bis(trifluoromethane sulfonyl)imide salt and fluoroethylene carbonate additive to construct a stable electrode interface, lithium nitrate for anion‐coordinated solvation structure, triethyl phosphate to strengthen the flame resistance, and 1,1,2,2‐tetrafluoroethyl‐2,2,3,3‐tetrafluoropropyl ether as a non‐solvating diluent to modulate viscosity. Being used in Li||SPAN cells, the as‐formulated electrolyte enables the formation of robust electrolyte interface on both SPAN cathode and Li anode, even at a low salt concertation of 0.45 m , and enables Li||SPAN cell an exceptional cycling stability with 91.3% capacity retention over 500 cycles and high flame resistance.
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