Operando identification of the point of [Mn2]O4 spinel formation during γ-MnO2 discharge within batteries
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- 作者：Joshua W. Gallawaya ; jgallaway@che.ccny.cuny.edu" class="auth_mail" title="E-mail the corresponding author ; Benjamin J. Hertzbergb ; Zhong Zhongc ; Mark Croftd ; Damon E. Turneya ; Gautam G. Yadava ; Daniel A. Steingartb ; Can K. Erdonmeze ; Sanjoy Banerjeea
- 关键词：Alkaline battery ; Manganese dioxide ; Zinc ; Spinel ; Proton insertion ; Operando diffraction
- 刊名：Journal of Power Sources
- 出版年：2016
- 出版时间：30 July 2016
- 年：2016
- 卷：321
- 期：Complete
- 页码：135-142
- 全文大小：2551 K
文摘
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Discharge of γ-MnO2 was tracked within sealed batteries as a function of position.
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Spinel formation immediately followed phase transition to α-MnOOH.
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Well-formed α-MnOOH occurred after insertion of 0.79 H+ per Mn atom.
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Insertion of 0.79 H+ correlated to 104% of the 2 × 1 ramsdellite tunnel capacity.