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A comparison study of MnO2 and Mn2O3 as zinc-ion battery cathodes: an experimental and computational investigation
RSC Advances ( IF 3.9 ) Pub Date : 2021-4-19 , DOI: 10.1039/d1ra00346a Hongyuan Shen 1 , Binbin Liu 2 , Zanxiang Nie 3 , Zixuan Li 2 , Shunyu Jin 4 , Yuan Huang 5 , Hang Zhou 2
RSC Advances ( IF 3.9 ) Pub Date : 2021-4-19 , DOI: 10.1039/d1ra00346a Hongyuan Shen 1 , Binbin Liu 2 , Zanxiang Nie 3 , Zixuan Li 2 , Shunyu Jin 4 , Yuan Huang 5 , Hang Zhou 2
Affiliation
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The high specific capacity, low cost and environmental friendliness make manganese dioxide materials promising cathode materials for zinc-ion batteries (ZIBs). In order to understand the difference between the electrochemical behavior of manganese dioxide materials with different valence states, i.e., Mn(III) and Mn(IV), we investigated and compared the electrochemical properties of pure MnO2 and Mn2O3 as ZIB cathodes via a combined experimental and computational approach. The MnO2 electrode showed a higher discharging capacity (270.4 mA h g−1 at 0.1 A g−1) and a superior rate performance (125.7 mA h g−1 at 3 A g−1) than the Mn2O3 electrode (188.2 mA h g−1 at 0.1 A g−1 and 87 mA h g−1 at 3 A g−1, respectively). The superior performance of the MnO2 electrode was ascribed to its higher specific surface area, higher electronic conductivity and lower diffusion barrier of Zn2+ compared to the Mn2O3 electrode. This study provides a detailed picture of the diversity of manganese dioxide electrodes as ZIB cathodes.
中文翻译：
MnO2 和 Mn2O3 作为锌离子电池阴极的比较研究：实验和计算研究
高比容量、低成本和环境友好使得二氧化锰材料成为锌离子电池（ZIB）正极材料的有前景的材料。为了了解不同价态二氧化锰材料Mn( III )和Mn( IV )电化学行为的差异，我们研究并比较了纯MnO 2和Mn 2 O 3作为ZIB正极的电化学性能。通过实验和计算相结合的方法。与Mn 2 O 3电极（188.2 mA）相比，MnO 2电极表现出更高的放电容量（0.1 A g -1时为270.4 mA hg -1 ）和优异的倍率性能（3 A g -1时为125.7 mA hg -1 ）。分别为0.1 A g -1下的hg -1和3 A g -1下的87 mA hg -1 。与Mn 2 O 3电极相比，MnO 2电极的优越性能归因于其更高的比表面积、更高的电子电导率和更低的Zn 2+扩散势垒。 这项研究详细介绍了作为 ZIB 阴极的二氧化锰电极的多样性。
更新日期：2021-04-19
中文翻译：
MnO2 和 Mn2O3 作为锌离子电池阴极的比较研究：实验和计算研究
高比容量、低成本和环境友好使得二氧化锰材料成为锌离子电池（ZIB）正极材料的有前景的材料。为了了解不同价态二氧化锰材料Mn( III )和Mn( IV )电化学行为的差异，我们研究并比较了纯MnO 2和Mn 2 O 3作为ZIB正极的电化学性能。通过实验和计算相结合的方法。与Mn 2 O 3电极（188.2 mA）相比，MnO 2电极表现出更高的放电容量（0.1 A g -1时为270.4 mA hg -1 ）和优异的倍率性能（3 A g -1时为125.7 mA hg -1 ）。分别为0.1 A g -1下的hg -1和3 A g -1下的87 mA hg -1 。与Mn 2 O 3电极相比，MnO 2电极的优越性能归因于其更高的比表面积、更高的电子电导率和更低的Zn 2+扩散势垒。 这项研究详细介绍了作为 ZIB 阴极的二氧化锰电极的多样性。
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