Oxygen-rich interface enables reversible stibium stripping/plating chemistry in aqueous alkaline batteries

Haozhe Zhang, Qiyu Liu, Dezhou Zheng, Fan Yang, Xiaoqing Liu and Xihong Lu ()
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Haozhe Zhang: Sun Yat-Sen University
Qiyu Liu: Sun Yat-Sen University
Dezhou Zheng: Wuyi University
Fan Yang: Sun Yat-Sen University
Xiaoqing Liu: Sun Yat-Sen University
Xihong Lu: Sun Yat-Sen University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Aqueous alkaline batteries see bright future in renewable energy storage and utilization, but their practical application is greatly challenged by the unsatisfactory performance of anode materials. Herein, we demonstrate a latent Sb stripping/plating chemistry by constructing an oxygen-rich interface on carbon substrate, thus providing a decent anode candidate. The functional interface effectively lowers the nucleation overpotential of Sb and strengthens the absorption capability of the charge carriers (SbO2− ions). These two advantageous properties inhibit the occurrence of side reactions and thus enable highly reversible Sb stripping/plating. Consequently, the Sb anode delivers theoretical-value-close specific capacity (627.1 mA h g−1), high depth of discharge (95.0%) and maintains 92.4% coulombic efficiency over 1000 cycles. A robust aqueous NiCo2O4//Sb device with high energy density and prominent durability is also demonstrated. This work provides a train of thoughts for the development of aqueous alkaline batteries based on Sb chemistry.

Date: 2021
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DOI: 10.1038/s41467-020-20170-8

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