期刊
ELECTROCHIMICA ACTA
卷 272, 期 -, 页码 154-160出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.04.012
关键词
Birnessite; Manganese oxide; Aqueous rechargeable batteries; Zinc; Cathode
资金
- Sichuan University [2017SCU11066]
- National Natural Science Foundation of China [11505121, 11775150]
- International Science and Technology Cooperation Program of China [2014DFR50710]
- Key Laboratory of Nuclear Materials and Safety Assessment [2017NMSAKF02]
A highly reversible aqueous rechargeable battery system is assembled by using a Zn anode, a room-temperature synthesized MnO2-birnessite cathode and a mild ZnSO4-based aqueous electrolyte with MnSO4 as an additive. Structural analysis reveal that MnO2-birnessite undergoes a structural transformation to poorly crystalline MnO2. It offers an operating voltage of 1.39 V, an energy density of 364 Wh kg(-1) (cathode only) at 200 mA g(-1) and shows a capacity retention of 100% over 400 cycles at 500 mA g(-1). This low-cost battery system is a promising candidate for large-scale energy storage. (C) 2018 Elsevier Ltd. All rights reserved.
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