材料科学
阳极
储能
碳化
法拉第效率
电化学
电导率
阴极
纳米技术
多孔性
碳纤维
化学工程
电极
复合材料
化学
复合数
工程类
物理
物理化学
功率(物理)
量子力学
扫描电子显微镜
作者
Qingfeng Zhang,Haipeng Wei,Longlu Wang,Jue Wang,Ling Fan,Hongbo Ding,Jiayi Lei,Xiao Yu,Bingan Lu
标识
DOI:10.1021/acsami.9b16280
摘要
The porous structure composed of non-metal elements of covalent organic frameworks (COFs) contributes to a large surface area and multifunction, rendering COFs a brilliant material for energy storage. Unfortunately, the low conductivity of most COFs limits their application in batteries. Herein, we fabricate COF-derived nitrogen-doped porous carbon (NPC) using nitrogen-rich COF-JLU2 as precursors by a simple carbonization for potassium-ion batteries (PIBs) and aluminum (Al) batteries for the first time. The computational results suggest that NPC has an enhanced conductivity and optimized electron density distribution. NPC could overcome the low conductivity of COF and thus further optimize its electrochemical performance in PIBs and Al batteries. It displays an excellent stability even after 2500 cycles (as the anode for PIBs) and 30000 cycles (as the cathode for Al batteries) with a high Coulombic efficiency. This fascinating study may be extended in other COFs for energy storage applications.
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