无定形固体
电解质
快离子导体
锂(药物)
材料科学
电化学
离子电导率
离子键合
化学工程
离子
固溶体
化学
电极
结晶学
有机化学
物理化学
冶金
医学
工程类
内分泌学
作者
Shumin Zhang,Feipeng Zhao,Jiatang Chen,Jiamin Fu,Jing Luo,Sandamini H. Alahakoon,Lo-Yueh Chang,Renfei Feng,Mohsen Shakouri,Jianwen Liang,Yang Zhao,Xiaona Li,Le He,Yining Huang,Tsun‐Kong Sham,Xueliang Sun
标识
DOI:10.1038/s41467-023-39197-8
摘要
Solid electrolyte is vital to ensure all-solid-state batteries with improved safety, long cyclability, and feasibility at different temperatures. Herein, we report a new family of amorphous solid electrolytes, xLi2O-MCly (M = Ta or Hf, 0.8 ≤ x ≤ 2, y = 5 or 4). xLi2O-MCly amorphous solid electrolytes can achieve desirable ionic conductivities up to 6.6 × 10-3 S cm-1 at 25 °C, which is one of the highest values among all the reported amorphous solid electrolytes and comparable to those of the popular crystalline ones. The mixed-anion structural models of xLi2O-MCly amorphous SEs are well established and correlated to the ionic conductivities. It is found that the oxygen-jointed anion networks with abundant terminal chlorines in xLi2O-MCly amorphous solid electrolytes play an important role for the fast Li-ion conduction. More importantly, all-solid-state batteries using the amorphous solid electrolytes show excellent electrochemical performance at both 25 °C and -10 °C. Long cycle life (more than 2400 times of charging and discharging) can be achieved for all-solid-state batteries using the xLi2O-TaCl5 amorphous solid electrolyte at 400 mA g-1, demonstrating vast application prospects of the oxychloride amorphous solid electrolytes.
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