法拉第效率
过电位
锂(药物)
电池(电)
胺气处理
化学工程
共价有机骨架
化学
比能量
催化作用
氯
储能
无机化学
共价键
有机化学
电极
电化学
内分泌学
物理化学
功率(物理)
工程类
物理
医学
量子力学
作者
Yang Xu,Mingming Wang,Muhammad Sajid,Yahan Meng,Zehui Xie,Jintao Zhang,Jian Jin,Wei Chen,Shenxiang Zhang
标识
DOI:10.1002/anie.202315931
摘要
Rechargeable Li-Cl2 battery is a promising high energy density battery system. However, reasonable cycle life could only be achieved under low specific capacities due to the sluggish oxidation of LiCl to Cl2 . Herein, we propose an amine-functionalized covalent organic framework (COF) with catalytic activity, namely COF-NH2 , that significantly decreases the oxidation barrier of LiCl and accelerates the oxidation kinetics of LiCl in Li-Cl2 cell. The resulting Li-Cl2 cell using COF-NH2 (Li-Cl2 @COF-NH2 ) simultaneously exhibits low overpotential, ultrahigh discharge capacity up to 3500 mAh/g and a promoted utilization ratio of deposited LiCl at the first cycle (UR-LiCl) of 81.4 %, which is one of the highest reported values to date. Furthermore, the Li-Cl2 @COF-NH2 cell could be stably cycled for over 200 cycles when operating at a capacity of 2000 mAh/g at -20 °C with a Coulombic efficiency (CE) of ≈100 % and a discharge plateau of 3.5 V. Our superior Li-Cl2 batteries enabled by organocatalyst enlighten an arena towards high-energy storage applications.
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