Electrochemically activated spinel manganese oxide for rechargeable aqueous aluminum battery

Chuan Wu, Sichen Gu, Qinghua Zhang, Ying Bai (), Matthew Li, Yifei Yuan, Huali Wang, Xinyu Liu, Yanxia Yuan, Na Zhu, Feng Wu, Hong Li, Lin Gu () and Jun Lu ()
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Chuan Wu: Beijing Institute of Technology
Sichen Gu: Beijing Institute of Technology
Qinghua Zhang: Chinese Academy of Sciences
Ying Bai: Beijing Institute of Technology
Matthew Li: Argonne National Laboratory
Yifei Yuan: Argonne National Laboratory
Huali Wang: Beijing Institute of Technology
Xinyu Liu: Chinese Academy of Sciences
Yanxia Yuan: Beijing Institute of Technology
Na Zhu: Beijing Institute of Technology
Feng Wu: Beijing Institute of Technology
Hong Li: Chinese Academy of Sciences
Lin Gu: Chinese Academy of Sciences
Jun Lu: Argonne National Laboratory

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Aluminum is a naturally abundant, trivalent charge carrier with high theoretical specific capacity and volumetric energy density, rendering aluminum-ion batteries a technology of choice for future large-scale energy storage. However, the frequent collapse of the host structure of the cathode materials and sluggish kinetics of aluminum ion diffusion have thus far hampered the realization of practical battery devices. Here, we synthesize AlxMnO2·nH2O by an in-situ electrochemical transformation reaction to be used as a cathode material for an aluminum-ion battery with a configuration of Al/Al(OTF)3-H2O/AlxMnO2·nH2O. This cell is not only based on aqueous electrolyte chemistry but also delivers a high specific capacity of 467 mAh g−1 and a record high energy density of 481 Wh kg−1. The high safety of aqueous electrolyte, facile cell assembly and the low cost of materials suggest that this aqueous aluminum-ion battery holds promise for large-scale energy applications.

Date: 2019
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DOI: 10.1038/s41467-018-07980-7

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