双锰矿
阴极
阳极
水溶液
电解质
电化学
储能
材料科学
电池(电)
化学
化学工程
无机化学
电极
冶金
锰
物理
工程类
功率(物理)
氧化锰
物理化学
量子力学
作者
Nan Qiu,Hong Chen,Zhaoming Yang,Song Sun,Yuan Wang
标识
DOI:10.1016/j.electacta.2018.04.012
摘要
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.
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