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Title: High-performance alkaline hybrid zinc batteries with heterostructure nickel/cobalt sulfide
Authors: Yin, Mingming
Miao, He
Dang, Jiaxin
Chen, Bin
Zou, Jiaqun
Chen, Genman
Li, Hong
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Yin, M., Miao, H., Dang, J., Chen, B., Zou, J., Chen, G. & Li, H. (2022). High-performance alkaline hybrid zinc batteries with heterostructure nickel/cobalt sulfide. Journal of Power Sources, 545, 231902-.
Project: M21K2c0118
Journal: Journal of Power Sources
Abstract: Despite their high energy density, great safety, and environmental friendliness, zinc-air batteries (ZABs) has insufficient energy efficiency and low discharge voltage for wide application. Constructing alkaline hybrid zinc battery (AHZB) by coupling ZABs with alkaline zinc-transition metal batteries can effectively address these issues. Herein, we report a nickel/cobalt sulfide heterostructure supported on nickel foam (Ni3S4@CoSx-NF), which exhibits excellent redox properties and high bifunctional oxygen catalytic activities. The aqueous AHZB with Ni3S4@CoSx-NF cathode demonstrates unprecedented energy efficiency (∼90%), high discharge voltage (1.70 V at 50 mA cm−2), and outstanding cycling stability. The evolution of valence states and phases of key materials observed through ex-situ characterizations suggests that Ni4+ and Co4+ contribute to the high redox activity. The solid-state AHZB with polyacrylamide-based gel electrolyte and Ni3S4@CoSx-NF cathode shows high power density over 100 mW cm−2, preceding that of self-supported solid ZAB. Importantly, it can operate at temperatures between −40 and 80 °C.
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2022.231902
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2022 Elsevier B.V. All rights reserved. This paper was published in Journal of Power Sources and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20241022
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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