Nb_(2)CT_(x) MXene: High capacity and ultra-long cycle capability for lithium-ion battery by regulation of functional groups

作     者：Jiabao Zhao Jing Wen Junpeng Xiao Xinzhi Ma Jiahui Gao Lina Bai Hong Gao Xitian Zhang Zhiguo Zhang Jiabao Zhao;Jing Wen;Junpeng Xiao;Xinzhi Ma;Jiahui Gao;Lina Bai;Hong Gao;Xitian Zhang;Zhiguo Zhang

作者机构：Key Laboratory for Photonic and Electronic Bandgap MaterialsMinistry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025HeilongjiangChina School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2021年第30卷第2期

页      面：387-395,I0013页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 080501[工学-材料物理与化学] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Project supported by the National Science Foundation of China (No.51772070 and 51772069) 

主　　题：MXene Nb_(2)CT_(x) Functional groups Lithium-ion batteries 

摘      要：MXenes are well known for their potential application in supercapacitors due to their high-rate intercalation pseudocapacitance and long ***,the reported low capacity of pristine MXenes hinders their practical application in lithium-ion *** this work,a robust strategy is developed to control the functional groups of Nb_2 CT_x *** capacity of pristine Nb_2 CT_x MXene can be significantly increased by Li~+ intercalation and surface *** specific capacity of the treated Nb_2 CT_x is up to 448 mAh g^(-1) at 0.05 A g^(-1),and at a large current density of 2 A g^(-1) remains a high reversible capacity retention rate of 75% after an ultra-long cycle of 2000 *** values exceed most of the reported pristine MXenes(including the most studied Ti_3 C_2 T_x) and carbon-based *** demonstrates that this strategy has great help to improve the electrochemical performance of pristine MXene,and the results enhance the promise of MXenes in the application of lithium-ion batteries.