Nitrogen-doped holey graphene nanoscrolls for high-energy and high-power supercapacitors  

作　　者：Feng Su Shuanghao Zheng Fangyan Liu Xiong Zhang Fangyuan Su Zhong-Shuai Wu 

机构地区：[1]Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [2]University of Chinese Academy of Sciences,Beijing J00049,China [3]Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China [4]CAS Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China [5]Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian 116023,China

出　　处：《Chinese Chemical Letters》2021年第2期914-917,共4页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51872283,21805273);National Key R&D Program of China (Nos.2016YBF0100100, 2016YFA0200200);Liaoning BaiQianWan Talents Program;LiaoNing Revitalization Talents Program (No.XLYC1807153);Natural Science Foundation of Liaoning Province,Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science (No. 20180510038);DICP (Nos.DICP ZZBS201708,DICP ZZBS201802);DICP&QIBEBT (No.DICP&QIBEBT UN201702);DNL Cooperation Fund,CAS (Nos.DNL180310,DNL180308,DNL201912,DNL201915)。

摘　　要：Porous structure and heteroatom doping are two key parameters for significantly boosting the capacitive performance of graphene-based materials.Herein,we report a facile approach to prepare onedimensional(ID) nitrogen-doped holey graphene nanoscrolls(NHGNSs) through cold quenching treatment of two-dimensional graphene oxide sheets,followed by thermal annealing in the successive atmosphere of NH3 and air.Benefiting from the synergy of the unique 1D tubular morphology,abundant nanoholes and nitrogen doping,the NHGNSs exhibit a high specific capacitance of 126 F/g at 1 A/g in ionic liquid electrolyte and excellent rate capability with 81% of the capacitance retained at 20 A/g.Furthermore,the fabricated symmetric supercapacitors based on NHGNSs achieve both high energy density of 53.5 Wh/kg at 875 W/kg and high power density of 17.5 kW/kg at 43.4 Wh/kg.The simple synthetic process and superior electrochemical performance suggest the great potential of NHGNSs for supercapacitor application.Porous structure and heteroatom doping are two key parameters for significantly boosting the capacitive performance of graphene-based materials.Herein,we report a facile approach to prepare onedimensional(ID) nitrogen-doped holey graphene nanoscrolls(NHGNSs) through cold quenching treatment of two-dimensional graphene oxide sheets,followed by thermal annealing in the successive atmosphere of NH3 and air.Benefiting from the synergy of the unique 1D tubular morphology,abundant nanoholes and nitrogen doping,the NHGNSs exhibit a high specific capacitance of 126 F/g at 1 A/g in ionic liquid electrolyte and excellent rate capability with 81% of the capacitance retained at 20 A/g.Furthermore,the fabricated symmetric supercapacitors based on NHGNSs achieve both high energy density of 53.5 Wh/kg at 875 W/kg and high power density of 17.5 kW/kg at 43.4 Wh/kg.The simple synthetic process and superior electrochemical performance suggest the great potential of NHGNSs for supercapacitor application.

关 键 词：Graphene nanoscrolls Nitrogen doping Holey grapheme SUPERCAPACITORS Ionic liquid 

分 类 号：TM53[电气工程—电器] TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]