High-performance aluminum-ion batteries based on AlCl3/caprolactam electrolytes

Cheng Xu, Wenyang Zhang, Pan Li, Shimeng Zhao, Yiqun Du, Huixin Jin, Youjian Zhang, Zihan Wang, Jianxin Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Aluminum-ion batteries (AIBs) have become a promising energy storage system due to their excellent cycling performance and safety properties. However, many problems persist in the electrolyte system as well as high cost and harsh working environments. In this study, we prepared two novel electrolytes, namely, AlCl3/caprolactam (CPL) and AlCl3/urea/CPL for use in AIBs. The AlCl3/CPL electrolyte exhibited a specific capacity of 136 mA h g-1 at a current density of 5 A g-1. The performance of AIBs was improved when an appropriate amount of urea was added. The AlCl3/urea/CPL electrolyte achieved a high initial specific capacity of 151 mA h g-1 at 5 A g-1 and reached 132 mA h g-1 with a high coulombic efficiency of ∼98% after 3000 cycles. The CPL electrolyte improved the cutoff voltage and initial discharge voltage of AIBs, and the capacity of AIBs was significantly improved when compared with that of the reported electrolyte. This work provides innovative insights into AIBs, and CPL will be a promising electrolyte for AIBs.

Original languageEnglish
Pages (from-to)121-127
Number of pages7
JournalSustainable Energy and Fuels
Volume4
Issue number1
DOIs
Publication statusPublished - 2019
Externally publishedYes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

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