Hydrated Eutectic Electrolytes with Ligand-Oriented Solvation Shells for Long-Cycling Zinc-Organic Batteries

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

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Author(s)

  • Wuhai Yang
  • Xiaofan Du
  • Jingwen Zhao
  • Zheng Chen
  • Jiajia Li
  • Jian Xie
  • Yaojian Zhang
  • Zili Cui
  • Qingyu Kong
  • Zhiming Zhao
  • Cunguo Wang
  • Guanglei Cui

Detail(s)

Original languageEnglish
Pages (from-to)1557-1574
Journal / PublicationJoule
Volume4
Issue number7
Online published1 Jul 2020
Publication statusPublished - 15 Jul 2020
Externally publishedYes

Abstract

Despite their intrinsic safety and cost-effectiveness, aqueous zinc (Zn)-organic batteries have been struggling with the rapid performance degradation arising from the poor reversibility of Zn anodes and the dissolution of cathodes. Here, we present a new aqueous eutectic electrolyte by coupling a hydrated Zn salt (Zn(ClO4)2·6H2O) exclusively with a neutral ligand (succinonitrile) to mitigate these issues. The unique aqua Zn2+ solvates with a succinonitrile-assisted solvation shell enable an unusual Zn/Zn2+ reversibility of 98.4% Coulombic efficiency along with smooth Zn deposition. Moreover, all water molecules contribute to the formation of the eutectic network, resulting in a delayed oxidation and suppressed solvating ability. When a quinone-based polymer material (38 wt % sulfur content) is utilized as a cathode, the Zn-organic battery with this aqueous eutectic electrolyte exhibits an unprecedented cyclability with a low capacity decay rate (0.004% per cycle over 3,500 cycles) and superior low-temperature performance.

Research Area(s)

  • cyclability, hydrated eutectic electrolyte, solvation shell, zinc battery

Citation Format(s)

Hydrated Eutectic Electrolytes with Ligand-Oriented Solvation Shells for Long-Cycling Zinc-Organic Batteries. / Yang, Wuhai; Du, Xiaofan; Zhao, Jingwen; Chen, Zheng; Li, Jiajia; Xie, Jian; Zhang, Yaojian; Cui, Zili; Kong, Qingyu; Zhao, Zhiming; Wang, Cunguo; Zhang, Qichun; Cui, Guanglei.

In: Joule, Vol. 4, No. 7, 15.07.2020, p. 1557-1574.

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