共价有机骨架
锂(药物)
结晶度
阴极
离子
石墨
电池(电)
共价键
氧化还原
锂离子电池
材料科学
萃取(化学)
合理设计
密度泛函理论
化学
化学工程
纳米技术
电极
有机化学
电化学
物理
复合材料
工程类
物理化学
计算化学
功率(物理)
冶金
内分泌学
医学
量子力学
作者
Derong Luo,Jing Zhang,Huizi Zhao,Xu Hai,Xiaoyu Dong,Lei Wu,Bing Ding,Haoran Dou,Xiaogang Zhang
摘要
A two-dimensional covalent organic framework (NTCDI-COF) with rich redox active sites, high stability and crystallinity was designed and prepared. As a cathode material for lithium-ion batteries (LIBs), NTCDI-COF exhibits excellent electrochemical performance with an outstanding discharge capacity of 210 mA h g-1 at 0.1 A g-1 and high capacity retention of 125 mA h g-1 after 1500 cycles at 2 A g-1. A two-step Li+ insertion/extraction mechanism is proposed based on the ex situ characterization and density functional theory calculation. The constructed NTCDI-COF//graphite full cells can realize a good electrochemical performance.
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