Flexible polytriphenylamine-based cathodes with reinforced energystorage capacity for high-performance sodium-ion batteries

作     者：Lulu Mo Gangyong Zhou Peng Ge Yue-E Miao Tianxi Liu 莫璐璐;周刚勇;葛鹏;缪月娥;刘天西

作者机构：State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringInnovation Center for Textile Science and TechnologyDonghua UniversityShanghai 201620China Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China 

基　　金：financially supported by the National Natural Science Foundation of China(22075042) the Natural Science Foundation of Shanghai(20ZR1401400 and 18ZR1401600) the Shanghai Scientific and Technological Innovation Project(18JC1410600) the Fundamental Research Funds for the Central Universities and DHU Distinguished Young Professor Program(LZB2021002) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2022年第65卷第1期

页      码：32-42页

摘      要：Owing to the excellent redox reversibility and structural diversity,polytriphenylamine(PTPAn)has been regarded as one of the promising cathode candidates for sodium-ion ***,it still suffers from the bulk aggregation and low operating capacity in practical *** by the in-situ polymerization,leaf-like PTPAn nanosheets are uniformly introduced on the surface of carbon nanofibers(CNFs)to form the free-standing CNF@PTPAn composite ***,the formation mechanism of the leaf-on-branch structure of CNF@PTPAn composites is systematically explored,confirming that the controlling of oxidation rate and growth degree plays crucial roles in tuning the morphology and active material content of the composite *** by the capacity-cutting analysis,the effective coupling between the active PTPAn and conductive CNFs can provide fast electron/ion-shuttling channels and deepen the electrochemical reaction *** 50mAg^(-1),the capacity of the optimized CNF@PTPAn composite can reach 105mAh g^(-1),with a stable rate capability of 78mAh g^(-1)even at 400mAg^(-1)after 500 cycles in a half *** detailed kinetic analysis confirms that the ion-storage behaviors in the lowvoltage region can be tailored for the improved capacitive contribution and diffusion ***,the flexible CNF-based full cell with CNF@PTPAn as the cathode and CNFs as the anode exhibits a high energy density of 60Wh kg^(-1)at 938Wkg^(-1).Based on this,the rational design is expected to provide more possibilities to obtain advanced freestanding electrode systems.

主 题 词：polytriphenylamine carbon nanofibers electrospinning organic cathode flexible sodium-ion batteries 

学科分类：0808[工学-自动化类] 08[工学] 0805[工学-能源动力学] 080502[080502] 

核心收录：

D　O　I：10.1007/s40843-021-1718-2

馆 藏 号：203104507...