Relieving hydrogen evolution and anodic corrosion of aqueous aluminum batteries with hybrid electrolytes

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

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Author(s)

  • Xuejin Li
  • Yongchao Tang
  • Haiming Lv
  • Haodong Fan
  • Wenlong Wang
  • Tonghui Cai
  • Yongpeng Cui
  • Wei Xing
  • Zifeng Yan
  • Hongfei Li

Detail(s)

Original languageEnglish
Pages (from-to)4739-4748
Journal / PublicationJournal of Materials Chemistry A
Volume10
Issue number9
Online published27 Jan 2022
Publication statusPublished - 7 Mar 2022

Abstract

The lower electro-stripping/plating potential of Al3+/Al (-1.68 V) than that of H+/H2 seriously impedes the performance of rechargeable aqueous aluminum-ion batteries (AAIBs). Besides, the Al plate is easily corroded in aqueous electrolytes due to the typical acidic nature of aluminum salt solutions. Exploring appropriate aqueous electrolytes is indispensable to achieve a high-performance AAIB. In this work, we initiate an AlCl3/lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) electrolyte and find that the addition of an appropriate concentration of LiTFSI can efficiently hinder the hydrogen evolution and corrosion of Al anodes. The full AAIB composed of a vanadium potassium cathode and Al anode exhibits reversible charge/discharge behaviors in 0.5 M AlCl3@12 M LiTFSI electrolyte. Electrochemical and structural analyses reveal that the vanadium potassium cathode experiences a reversible Al3+, H+ and Li+ co-intercalation/de-intercalation process during cycling. The full AAIB manifests excellent performance in terms of large capacity (223 mA h g-1 at 1000 mA g-1), superior rate capability (more than 50% retention from 1000 to 6000 mA g-1) and outstanding cycling stability (maintains 64.6% after 300 cycles). Moreover, the soft-packed AAIB also manifests good cycling stability and desirable flexibility. The strategy reported in our manuscript may promote the development of rechargeable aluminum-ion batteries based on aqueous electrolytes.

Research Area(s)

  • CATHODE MATERIAL, ION BATTERY, ANATASE TIO2, STORAGE, AL3+, INTERCALATION, NANOCOMPOSITE, GRAPHENE, MOO3

Citation Format(s)

Relieving hydrogen evolution and anodic corrosion of aqueous aluminum batteries with hybrid electrolytes. / Li, Xuejin; Tang, Yongchao; Li, Chuan; Lv, Haiming; Fan, Haodong; Wang, Wenlong; Cai, Tonghui; Cui, Yongpeng; Xing, Wei; Yan, Zifeng; Zhi, Chunyi; Li, Hongfei.

In: Journal of Materials Chemistry A, Vol. 10, No. 9, 07.03.2022, p. 4739-4748.

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