A high-energy aqueous aluminum-manganese battery

Shiman He, Jie Wang, Xu Zhang, Jingzhao Chen, Zichun Wang, Tingting Yang, Zhiwei Liu, Yuan Liang, Boya Wang, Shiqi Liu, Liqiang Zhang, Jianyu Huang, Jun Huang, Luke A. O'Dell, Haijun Yu*

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Rechargeable aluminum-ion batteries have drawn considerable attention as a new energy storage system, but their applications are still significantly impeded by critical issues such as low energy density and the lack of excellent electrolytes. Herein, a high-energy aluminum-manganese battery is fabricated by using a Birnessite MnO2 cathode, which can be greatly optimized by a divalence manganese ions (Mn2+) electrolyte pre-addition strategy. The battery exhibits a remarkable energy density of 620 Wh kg−1 (based on the Birnessite MnO2 material) and a capacity retention above 320 mAh g−1 for over 65 cycles, much superior to that with no Mn2+ pre-addition. The electrochemical reactions of the battery are scrutinized by a series of analysis techniques, indicating that the Birnessite MnO2 pristine cathode is first reduced as Mn2+ to dissolve in the electrolyte upon discharge, and AlxMn(1− x )O2 is then generated upon charge, serving as a reversible cathode active material in following cycles. This work provides new opportunities for the development of high-performance and low-cost aqueous aluminum-ion batteries for prospective applications.

Original languageEnglish
Article number1905228
Pages (from-to)1-9
Number of pages9
JournalAdvanced Functional Materials
Volume29
Issue number45
Early online date2 Sep 2019
DOIs
Publication statusPublished - 7 Nov 2019

Keywords

  • aluminum-ion batteries
  • aqueous aluminum-manganese batteries
  • birnessite MnO₂ cathodes
  • divalence manganese ions
  • reaction mechanism

Fingerprint Dive into the research topics of 'A high-energy aqueous aluminum-manganese battery'. Together they form a unique fingerprint.

Cite this