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Title: All-metal phosphide electrodes for high-performance quasi-solid-state fiber-shaped aqueous rechargeable Ni-Fe batteries
Authors: Yang, Jiao
Wang, Zhe
Wang, Zhixun
Zhang, Jing
Zhang, Qichong
Shum, Perry Ping
Wei, Lei
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Yang, J., Wang, Z., Wang, Z., Zhang, J., Zhang, Q., Shum, P. P. & Wei, L. (2020). All-metal phosphide electrodes for high-performance quasi-solid-state fiber-shaped aqueous rechargeable Ni-Fe batteries. ACS Applied Materials & Interfaces, 12(11), 12801-12808.
Project: MOE2015-T2-2-010
Journal: ACS Applied Materials & Interfaces 
Abstract: Aqueous secondary Ni-Fe batteries with superior energy density, cost-effectiveness, and outstanding safety contribute significantly toward the development of portable and wearable energy storage devices with high performance. However, the common electrode materials are nickel/iron or their oxides which have suffered from poor conductivity and cycle performance. As an ideal candidate to address these issues, metal phosphides may offer outstanding theoretical specific capacity, low conversion potential, and impressive redox. In this study, one novel type of high-performance flexible Ni-Fe battery with binder-free electrodes on conductive fiber substrates is successfully designed and fabricated. Carbon nanotube fibers with the direct grown hierarchical NiCoP nanosheet arrays and FeP nanowire arrays are fabricated first using hydrothermal synthesis and then the pursuant gas phosphating process. With the assistance of the PVA-KOH gel electrolyte, our fiber-shaped aqueous rechargeable battery (FARB) presents negligible capacity loss after bending 3000 times. Meanwhile, the assembled FARB has a significant capacity of 0.294 mA h/cm2 under the current density of 2 mA/cm2 and a high energy density of 235.6 μW h/cm2.
ISSN: 1944-8244
DOI: 10.1021/acsami.9b22128
Schools: School of Electrical and Electronic Engineering 
Research Centres: CNRS International NTU THALES Research Alliances 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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