Free-Standing N-Doped Porous Carbon Fiber Membrane Derived From Zn–MOF-74: Synthesis and Application as Anode for Sodium-Ion Battery With an Excellent Performance

Frontiers in Chemistry

Huixian Wei¹  Changsheng Shan¹  Jingxuan Yang¹  Peiyu Cao²  Baojun Long²  Wen Wei²  Yan Mo²  Yechen Si²  Kaiwen Xue²  Elizabeth G. Michaelis³  Yanfeng Yue³  Hongyu Guan⁴  Shuya Xie⁴  George Guo⁵ 

[1] Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China;Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China;Department of Chemistry, Delaware State University, Dover, DE, United States;Department of Chemistry, Northeast Normal University, Changchun, China;Dover High School, Dover, DE, United States;

关键词: carbon fiber;    metal-organic framework;    sodium ion battery;    heteroatom doping;    porous structure;    electrochemistry;   

DOI  :  10.3389/fchem.2021.647545

来源: DOAJ

【 摘 要 】

It is important to develop new energy storage and conversion technology to mitigate the energy crisis for the sustainable development of human society. In this study, free-standing porous nitrogen-doped carbon fiber (PN-CF) membranes were obtained from the pyrolysis of Zn–MOF-74/polyacrylonitrile (PAN) composite fibers, which were fabricated in situ by an electrospinning technology. The resulting free-standing fibers can be cut into membrane disks and directly used as an anode electrode without the addition of any binder or additive. The PN-CFs showed great reversible capacities of 210 mAh g−1 at a current density of 0.05 A g−1 and excellent cyclic stability of 170.5 mAh g−1 at a current density of 0.2 A g−1 after 600 cycles in sodium ion batteries (SIBs). The improved electrochemical performance of PN-CFs can be attributed to the rich porous structure derived by the incorporation of Zn–MOF-74 and nitrogen doping to promote sodium ion transportation.

【 授权许可】

Unknown