Zinc/selenium conversion battery : a system highly compatible with both organic and aqueous electrolytes

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

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Detail(s)

Original languageEnglish
Pages (from-to)2441-2450
Journal / PublicationEnergy and Environmental Science
Volume14
Issue number4
Online published2 Mar 2021
Publication statusPublished - 1 Apr 2021

Abstract

Zinc ion batteries (ZIBs) typically work well in aqueous electrolytes. Most high-performance cathode materials of aqueous ZIBs exhibit much-deteriorated capacity, voltage plateau and rate capability in organic electrolytes. It remains a challenge to have a Zn battery that is highly compatible with both aqueous and organic electrolytes. Herein, a conversion-type Zn-Se battery is constructed, which delivers a superior performance in both organic and aqueous electrolytes benefiting from a highly reversible conversion reaction between Se and ZnSe. Extraordinary capacities in organic systems (551 mA h gSe-1) and aqueous systems (611 mA h gSe-1) were successfully achieved, accompanied by a remarkable rate performance and cycling performance in each of the two systems. In addition, very low voltage plateau slopes, 0.94 V/(A h g-1) and 0.61 V/(A h g-1), are obtained for organic and aqueous systems, respectively, due to the advanced conversion mechanism. These unique features equip these Zn-Se batteries with unprecedented energy densities of up to 581 W h kgSe-1 (290 W h kgSe/CMK-3-1) for the organic system and 751 W h kgSe-1 (375 W h kgSe/CMK-3-1) for the aqueous system. Our research has developed a new Zn battery chemistry that benefits from a conversion mechanism and is highly compatible with both organic and aqueous electrolytes, opening a door for zinc batteries to achieve a higher energy density and better compatibility with various electrolytes.

Citation Format(s)

Zinc/selenium conversion battery : a system highly compatible with both organic and aqueous electrolytes. / Chen, Ze; Mo, Funian; Wang, Tairan; Yang, Qi; Huang, Zhaodong; Wang, Donghong; Liang, Guojing; Chen, Ao; Li, Qing; Guo, Ying; Li, Xinliang; Fan, Jun; Zhi, Chunyi.

In: Energy and Environmental Science, Vol. 14, No. 4, 01.04.2021, p. 2441-2450.

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