Xue Kaiwen, Si Yechen, Xie Shuya, Yang Jingxuan, Mo Yan, Long Baojun, Wei Wen, Cao Peiyu, Wei Huixian, Guan Hongyu, Michaelis Elizabeth G, Guo George, Yue Yanfeng, Shan Changsheng
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.
Center for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China.
Front Chem. 2021 Apr 16;9:647545. doi: 10.3389/fchem.2021.647545. eCollection 2021.
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 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 at a current density of 0.05 A g and excellent cyclic stability of 170.5 mAh g at a current density of 0.2 A g 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.
开发新型储能和转换技术对于缓解能源危机以实现人类社会的可持续发展至关重要。在本研究中，通过静电纺丝技术制备的Zn-MOF-74/聚丙烯腈（PAN）复合纤维热解得到了自支撑多孔氮掺杂碳纤维（PN-CF）膜。所得的自支撑纤维可切割成膜片，无需添加任何粘结剂或添加剂即可直接用作阳极电极。在钠离子电池（SIBs）中，PN-CFs在0.05 A g的电流密度下表现出210 mAh g的高可逆容量，在0.2 A g的电流密度下经过600次循环后表现出170.5 mAh g的优异循环稳定性。PN-CFs电化学性能的改善可归因于通过引入Zn-MOF-74和氮掺杂形成的丰富多孔结构，从而促进了钠离子传输。
