A Novel Strategy of In Situ Trimerization of Cyano Groups Between the Ti3C2Tx(MXene) Interlayers for High-Energy and High-Power Sodium-Ion Capacitors

作     者：Siyang Liu Fangyuan Hu Wenlong Shao Wenshu Zhang Tianpeng Zhang Ce Song Man Yao Hao Huang Xigao Jian Siyang Liu;Fangyuan Hu;Wenlong Shao;Wenshu Zhang;Tianpeng Zhang;Ce Song;Man Yao;Hao Huang;Xigao Jian

作者机构：School of Materials Science and EngineeringState Key Laboratory of Fine ChemicalsKey Laboratory of Energy Materials and Devices(Liaoning Province)Dalian University of TechnologyDalian 116024People’s Republic of China State Key Laboratory of Fine ChemicalsDepartment of Polymer Science and EngineeringDalian University of TechnologyDalian 116024People’s Republic of China School of Mathematical SciencesDalian University of TechnologyDalian 116024People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2020年第12卷第10期

页      面：177-191页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：the support from the National Key Research and Development Program(No.2018YFB1107500) the National Natural Science Foundation of China(No.51503024) the Fundamental Research Funds for the Central Universities(Nos.DUT17RC(3)003,DUT18RC(4)033) the National Natural Science Foundation of the Joint Fund Key Projects(No.U1663226) 

主　　题：Sodium-ion capacitors MXene Fast kinetics Triazine polymerization Nitrogen doping 

摘      要：2D MXenes are attractive for energy storage applications because of their high electronic ***,it is still highly challenging for improving the sluggish sodium(Na)-ion transport kinetics within the MXenes ***,a novel nitrogen-doped Ti3C2Tx MXene was synthesized by introducing the in situ polymeric sodium dicyanamide(Na-dca)to tune the complex terminations and then utilized as intercalation-type pseudocapacitive anode of Na-ion capacitors(NICs).The Na-dca can intercalate into the interlayers of Ti3C2 Tx nanosheets and simultaneously form sodium tricyanomelaminate(Na3TCM)by the catalyst-free *** as-prepared Ti3C2Tx/Na3TCM exhibits a high N-doping of 5.6 at.%in the form of strong Ti-N bonding and stabilized triazine ring ***,coupling Ti3C2Tx/Na3 TCM anode with different mass of activated carbon cathodes,the asymmetric MXene//carbon NICs are *** is able to deliver high energy density(97.6 Wh kg-1),high power output(16.5 kW kg-1),and excellent cycling stability(≈82.6%capacitance retention after 8000 cycles).