Few-layer bismuth selenide cathode for low-temperature quasi-solid-state aqueous zinc metal batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number752
Journal / PublicationNature Communications
Volume13
Online published8 Feb 2022
Publication statusPublished - 2022

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Abstract

The performances of rechargeable batteries are strongly affected by the operating environmental temperature. In particular, low temperatures (e.g., ≤0 °C) are detrimental to efficient cell cycling. To circumvent this issue, we propose a few-layer Bi2Se3 (a topological insulator) as cathode material for Zn metal batteries. When the few-layer Bi2Se3 is used in combination with an anti-freeze hydrogel electrolyte, the capacity delivered by the cell at −20 °C and 1 A g−1 is 1.3 larger than the capacity at 25 °C for the same specific current. Also, at 0 °C the Zn | |few-layer Bi2Se3 cell shows capacity retention of 94.6% after 2000 cycles at 1 A g−1. This behaviour is related to the fact that the Zn-ion uptake in the few-layer Bi2Se3 is higher at low temperatures, e.g., almost four Zn2+ at 25 °C and six Zn2+ at −20 °C. We demonstrate that the unusual performance improvements at low temperatures are only achievable with the few-layer Bi2Se3 rather than bulk Bi2Se3. We also show that the favourable low-temperature conductivity and ion diffusion capability of few-layer Bi2Se3 are linked with the presence of topological surface states and weaker lattice vibrations, respectively.

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Few-layer bismuth selenide cathode for low-temperature quasi-solid-state aqueous zinc metal batteries. / Zhao, Yuwei; Lu, Yue; Li, Huiping; Zhu, Yongbin; Meng, You; Li, Na; Wang, Donghong; Jiang, Feng; Mo, Funian; Long, Changbai; Guo, Ying; Li, Xinliang; Huang, Zhaodong; Li, Qing; Ho, Johnny C.; Fan, Jun; Sui, Manling; Chen, Furong; Zhu, Wenguang; Liu, Weishu; Zhi, Chunyi.

In: Nature Communications, Vol. 13, 752, 2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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