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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8086192 | PMC |
| http://dx.doi.org/10.3389/fchem.2021.647545 | DOI Listing |
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