材料科学
机制(生物学)
阴极
溶解
电解质
电池(电)
电化学
锰
插层(化学)
阳极
反应机理
储能
化学工程
沉积(地质)
无机化学
电极
物理化学
化学
冶金
工程类
热力学
物理
认识论
哲学
古生物学
催化作用
功率(物理)
生物
生物化学
沉积物
作者
Xun Guo,Jiang Zhou,Chaolei Bai,Xinkuo Li,Guozhao Fang,Shuquan Liang
标识
DOI:10.1016/j.mtener.2020.100396
摘要
Rechargeable Zn/MnO2 battery chemistry in mildly acidic aqueous electrolytes has attracted extensive attention because of its properties as safe, inexpensiveness, and high theoretical specific capacity of cathode/zinc anode. However, the major limitation of MnO2 cathode is its unclear energy storage mechanism. Herein, the reaction mechanism in ZnSO4+MnSO4 electrolyte is investigated by various electrochemical and structural analysis based on two different structure manganese dioxide (α-MnO2 and δ-MnO2) and Zn4SO4(OH)6·4H2O (ZHS) prepared on purpose. We find that the Zn/MnO2 battery is dominated by the Dissolution-Deposition reaction mechanism, while the classical cations (H+, Zn2+) Intercalation/De-intercalation mechanism contributes little capacity in energy storage process. The major limitations of reaction kinetics, such as ZHS and active H2O, are explored in this work. We believe that the systematic research on the Dissolution/Deposition mechanism is useful for researchers to understand the energy storage mechanism of Zn/MnO2 battery.
科研通智能强力驱动
Strongly Powered by AbleSci AI