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

Kaiwen Xue; Yechen Si; Shuya Xie; Jingxuan Yang; Yan Mo; Baojun Long; Wen Wei; Peiyu Cao; Huixian Wei; Hongyu Guan; Elizabeth G Michaelis; George Guo; Yanfeng Yue; Changsheng Shan

doi:10.3389/fchem.2021.647545

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

Front Chem. 2021 Apr 16:9:647545. doi: 10.3389/fchem.2021.647545. eCollection 2021.

Authors

Kaiwen Xue¹, Yechen Si¹, Shuya Xie^{2

3}, Jingxuan Yang², Yan Mo¹, Baojun Long¹, Wen Wei¹, Peiyu Cao¹, Huixian Wei², Hongyu Guan^{2

3}, Elizabeth G Michaelis⁴, George Guo^{4

5}, Yanfeng Yue⁴, Changsheng Shan^{1

2}

Affiliations

¹ 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.
² Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China.
³ Department of Chemistry, Northeast Normal University, Changchun, China.
⁴ Department of Chemistry, Delaware State University, Dover, DE, United States.
⁵ Dover High School, Dover, DE, United States.

Abstract

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.

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