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Title: Rational construction of self-standing sulfur-doped Fe2O3 anodes with promoted energy storage capability for wearable aqueous rechargeable NiCo-Fe batteries
Authors: Yang, Jiao
Zhang, Qichong
Wang, Zhixun
Wang, Zhe
Kang, Lixing
Qi, Miao
Chen, Mengxiao
Liu, Wen
Gong, Wenbin
Lu, Weibang
Shum, Perry Ping
Wei, Lei
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Yang, J., Zhang, Q., Wang, Z., Wang, Z., Kang, L., Qi, M., Chen, M., Liu, W., Gong, W., Lu, W., Shum, P. P. & Wei, L. (2020). Rational construction of self-standing sulfur-doped Fe2O3 anodes with promoted energy storage capability for wearable aqueous rechargeable NiCo-Fe batteries. Advanced Energy Materials, 10(33), 2001064-.
Project: MOE2019-T2-2-127 
Journal: Advanced Energy Materials
Abstract: Aqueous rechargeable Ni-Fe batteries featuring an ultra-flat discharge plateau, low cost, and outstanding safety characteristics show promising prospects for application in wearable energy storage. In particular, fiber-shaped Ni-Fe batteries will enable textile-based energy supply for wearable electronics. However, the development of fiber-shaped Ni-Fe batteries is currently challenged by the performance of fibrous Fe-based anode materials. In this context, this study describes the fabrication of sulfur-doped Fe2O3 nanowire arrays (S-Fe2O3 NWAs) grown on carbon nanotube fibers (CNTFs) as an innovative anode material (S-Fe2O3 NWAs/CNTF). Encouragingly, first-principle calculations reveal that S-doping in Fe2O3 can dramatically reduce the band gap from 2.34 to 1.18 eV and thus enhance electronic conductivity. The novel developed S-Fe2O3 NWAs/CNTF electrode is further demonstrated to deliver a very high capacity of 0.81 mAh cm−2 at 4 mA cm−2. This value is almost sixfold higher than that of the pristine Fe2O3 NWAs/CNTF electrode. When a cathode containing zinc-nickel-cobalt oxide (ZNCO)@Ni(OH)2 NWAs heterostructures is used, 0.46 mAh cm−2 capacity and 67.32 mWh cm−3 energy density are obtained for quasi-solid-state fiber-shaped NiCo-Fe batteries, which outperform most state-of-the-art fiber-shaped aqueous rechargeable batteries. These findings offer an innovative and feasible route to design high-performance Fe-based anodes and may inspire new development for the next-generation wearable Ni-Fe batteries.
ISSN: 1614-6832
DOI: 10.1002/aenm.202001064
Rights: © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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