Di Lu, Ruhong Li, Muhammad Mominur Rahman, Pengyun Yu, Ling Lv, Sheng Yang, Yiqiang Huang, Chuangchao Sun, Shuoqing Zhang, Haikuo Zhang, Junbo Zhang, Xuezhang Xiao, Tao Deng, Liwu Fan, Lixin Chen, Jianping Wang, Enyuan Hu, Chunsheng Wang, Xiulin Fan
Li-ion batteries (LIBs) for electric vehicles and aviation demand high energy density, fast charging and a wide operating temperature range, which are virtually impossible because they require electrolytes to simultaneously have high ionic conductivity, low solvation energy and low melting point and form an anion-derived inorganic interphase1-5 . Here we report guidelines for designing such electrolytes by using small-sized solvents with low solvation energy. The tiny solvent in the secondary solvation sheath pulls out the Li+ in the primary solvation sheath to form a fast ion-conduction ligand channel to enhance Li+ transport, while the small-sized solvent with low solvation energy also allows the anion to enter the first Li+ solvation shell to form an inorganic-rich interphase...
February 28, 2024: Nature