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https://hdl.handle.net/10356/151252
Title: | Co₂P@N,P-codoped carbon nanofiber as a free-standing air electrode for Zn-air batteries : synergy effects of CoNₓ satellite shells | Authors: | Gao, Jingchang Wang, Jinming Zhou, Lijun Cai, Xiaoyi Zhan, Da Hou, Mingzhen Lai, Linfei |
Keywords: | Science::Physics | Issue Date: | 2019 | Source: | Gao, J., Wang, J., Zhou, L., Cai, X., Zhan, D., Hou, M. & Lai, L. (2019). Co₂P@N,P-codoped carbon nanofiber as a free-standing air electrode for Zn-air batteries : synergy effects of CoNₓ satellite shells. ACS Applied Materials and Interfaces, 11(10), 10364-10372. https://dx.doi.org/10.1021/acsami.8b20003 | Journal: | ACS Applied Materials and Interfaces | Abstract: | Here, a free-standing electrode composed of cobalt phosphides (Co₂P) supported by cobalt nitride moieties (CoNₓ) and an N,P-codoped porous carbon nanofiber (CNF) in one-step electrospinning of environmentally friendly benign phosphorous precursors is reported. Physiochemical characterization revealed the symbiotic relationship between a Co₂P crystal and surrounding nanometer-sized CoNₓ moieties embedded in an N,P-codoped porous carbon matrix. Co₂P@CNF shows high oxygen reduction reaction and oxygen evolution reaction performance owing to the synergistic effect of Co₂P nanocrystals and the neighboring CoNₓ moieties, which have the optimum binding strength of reactants and facilitate the mass transfer. The free-standing Co₂P@CNF air-cathode-based Zn-air batteries deliver a power density of 121 mW cm⁻² at a voltage of 0.76 V. The overall overpotential of Co₂P@CNF-based Zn-air batteries can be significantly reduced, with low discharge-charge voltage gap (0.81 V at 10 mA cm⁻²) and high cycling stability, which outperform the benchmark Pt/C-based Zn-air batteries. The one-step electrospinning method can serve as a universal platform to develop other high-performance transition-metal phosphide catalysts benefitting from the synergy effect of transition nitride satellite shells. The free-standing and flexible properties of Co₂P@CNF make it a potential candidate for wearable electronic devices. | URI: | https://hdl.handle.net/10356/151252 | ISSN: | 1944-8244 | DOI: | 10.1021/acsami.8b20003 | Schools: | School of Physical and Mathematical Sciences | Rights: | © 2019 American Chemical Society. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | SPMS Journal Articles |
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