The molten chlorides for aluminum-graphite rechargeable batteries

Jiguo Tu, Junxiang Wang, Hongmin Zhu, Shuqiang Jiao

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A low-cost, high-capacity Al-graphite rechargeable aluminum-ion battery is confirmed to be able to work stably in a quaternary AlCl3-NaCl-LiCl-KCl inorganic molten salt as electrolyte with the lowest eutectic temperature of less than 75 °C. The battery shows a stable specific capacity of 114.9 mAh g−1 at 200 mA g−1 over 1500 cycles at 90 °C. Moreover, the capacity can remain at ∼85 mAh g−1 with a higher current density of 800 mA g−1 over 2600 cycles at 90 °C. Importantly, even cycled at 80 °C and 100 °C, almost 100% capacity retention can be achieved after 5800 cycles when the temperature is back to 90 °C, verifying the superior long-term cycling stability under various temperatures. The inherent low-cost and high capacity, as well as outstanding long-term cycling stability, makes it particularly favorable for large-scale energy storage devices.

Original languageEnglish
Article number153285
JournalJournal of Alloys and Compounds
Volume821
DOIs
Publication statusPublished - 2020 Apr 25

Keywords

  • Aluminum-ion battery
  • Graphite
  • Ionic conductivity
  • Low-temperature molten salt
  • Polarization potential

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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