Nitrogen-doped porous carbon nanosheets as both anode and cathode for advanced potassium-ion hybrid capacitors  

作　　者：Quanzhou Du Yuhua Zhao Yujuan Chen Jianming Liu Huanhuan Li Guangyue Bai Kelei Zhuo Jianji Wang 

机构地区：[1]Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals,Key Laboratory of Green Chemical Media and Reactions,Ministry of Education,School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang,Henan,453007,China

出　　处：《Green Energy & Environment》2023年第2期579-588,共10页绿色能源与环境（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21873026,21573061,21773059)。

摘　　要：Potassium-ion hybrid capacitors(PIHCs)as a burgeoning research hotspot are an ideal replacement for lithium-ion hybrid capacitors(LIHCs).Here,we report nitrogen-doped porous carbon nanosheets(NPCNs)with enlarged interlayer spacing,abundant defects,and favorable mesoporous structures.The structural changes of NPCNs in potassiation and depotassiation processes are analyzed by using Raman spectroscopy and transmission electron microscopy.Due to the unique structure of NPCNs,the PIHC device assembled using NPCNs as both the anode and cathode material(double-functional self-matching material)exhibits a superior energy density of 128 Wh kg^(-1)with a capacity retention of 90.8%after 9000 cycles.This research can promote the development of double-functional self-matching materials for hybrid energy storage devices with ultra-high performance.

关 键 词：Potassium-ion Porous carbon Hybrid capacitor Energy storage NITROGEN-DOPING 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]