Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (4): 1236-1245.doi: 10.19799/j.cnki.2095-4239.2021.0616

• Special issue of International Outstanding Young Scientists for Energy Storage • Previous Articles     Next Articles

Recent advances and prospects of electrolyte for aluminum ion batteries

Liang FANG1(), Kai ZHANG2(), Limin ZHOU3,4()   

  1. 1.School of Energy and Materials Engineering, Dongguk University, Seoul 04620, South Korea
    2.Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), School of Chemistry, Nankai University, Tianjin 300071, China
    3.School of Materials Science and Engineering, Korea University, Seoul 02841, South Korea
    4.College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, China
  • Received:2021-11-18 Revised:2021-11-22 Online:2022-04-05 Published:2022-04-11
  • Contact: Kai ZHANG,Limin ZHOU E-mail:1332128069@qq.com;zhangkai_nk@nankai.edu.cn;lmzhou2012@163.com

Abstract:

Benefitting from high gravimetric/volumetric energy density, low cost, and high safety of aluminum anode, rechargeable aluminum ion batteries (AIBs) have become promising next-generation energy-storage battery system. AIBs are comprised of Al anode, cathode materials, and 1-ethyl-3-methylimidazole chloride ([EMIm]Cl)-based ionic liquid electrolyte. Currently, significant progresses have been made in the performance optimization of Al-storage cathodes; however, the practical application of AIBs is limited by electrolyte problems, including high cost, corrosivity, humidity sensitivity, and unstable interface. This review summarizes recent works on AIB electrolyte and the tactics to improve the practicability of AIB electrolyte. From the perspective of cost reduction, modify and optimize the property of low-cost ionic liquid electrolyte and low-temperature molten salt system. In the viewpoint of chemical stability, develop new-type electrolyte systems, such as gel polymer and solid-state electrolyte, which aim at protecting ionic liquids with solid substrate. Exploring low-cost and chemically/electrochemically stable electrolyte is an attractive direction in the field of AIBs. In addition, the modification schemes and existing problems of different electrolytes are comprehensively analyzed and discussed, and the future development of AIB electrolyte is prospected.

Key words: aluminum ion batteries, electrolyte, ionic liquid, gel polymer, low cost

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