TY - JOUR
T1 - A high-energy aqueous aluminum-manganese battery
AU - He, Shiman
AU - Wang, Jie
AU - Zhang, Xu
AU - Chen, Jingzhao
AU - Wang, Zichun
AU - Yang, Tingting
AU - Liu, Zhiwei
AU - Liang, Yuan
AU - Wang, Boya
AU - Liu, Shiqi
AU - Zhang, Liqiang
AU - Huang, Jianyu
AU - Huang, Jun
AU - O'Dell, Luke A.
AU - Yu, Haijun
PY - 2019/11/7
Y1 - 2019/11/7
N2 - 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.
AB - 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.
KW - aluminum-ion batteries
KW - aqueous aluminum-manganese batteries
KW - birnessite MnO₂ cathodes
KW - divalence manganese ions
KW - reaction mechanism
UR - http://www.scopus.com/inward/record.url?scp=85071451019&partnerID=8YFLogxK
U2 - 10.1002/adfm.201905228
DO - 10.1002/adfm.201905228
M3 - Article
AN - SCOPUS:85071451019
SN - 1616-3028
VL - 29
SP - 1
EP - 9
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 45
M1 - 1905228
ER -