A High‐Energy Aqueous Aluminum‐Manganese Battery

By Shiman He, Jie Wang, Xu Zhang, Jingzhao Chen, Zichun Wang, Tingting Yang, Zhiwei Liu, Yuan Liang, Boya Wang, Shiqi Liu and 5 more. Advanced Functional Materials, 2019

206 citations recorded by the source corpus.

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.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/f691e93b9a404d510cd510a0cb3024adc11d2fdb

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In Electrical and Electronic Engineering

1. Yu‐Guo Guo
2. Sen Xin
3. Guoxiu Wang
4. Yongbing Tang
5. L. Wan
6. D. Su
7. Yutao Li
8. Xiulei Ji

Citations in the corpus

• Emerging rechargeable aqueous aluminum ion battery: Status, challenges, and outlooks (2020, unknown): “Overall reaction mechanism was further proposed: This method was further applied to a MnO 2 j Al(OTF) 3 þ MnSO 4 j TAl cell, where the addition of Mn 2 þ salt was employed to enhance the cell performance [59].”
• Latest Advances in High-Voltage and High-Energy-Density Aqueous Rechargeable Batteries (2020, background): “5 m MnSO4 into the Al(OTf)3 aqueous electrolyte, which is similar to the Zn/ MnO2 battery where a Mn2+ salt improves both capacity and cycling performance of the manganese oxide electrode [133].”
• The 2021 battery technology roadmap (2020, background): “In summary, the promising combination of safety, low-cost and high energy density should allow RAIBs to become one of the candidates for energy-storage technology.”