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Review of the Stability/Capacity Trade-off in Silver Hollandite Lithium Battery Cathodes

  • Paul F. Smith (a1), Diana M. Lutz (a1), Esther S. Takeuchi (a1) (a2) (a3), Kenneth J. Takeuchi (a1) (a2) and Amy C. Marschilok (a1) (a2) (a3)...

Abstract

Highly detailed structural characterization is required to understand the discharge mechanism in order to effectively investigate α-MnO2 structured lithium battery cathode materials. This paper discusses recent findings which elucidate the lithiation mechanism of silver-hollandite, AgxMn8O16. For Ag1.2Mn8O16, the structure is not significantly perturbed during the first 2 equivalents of lithiation and the electrochemistry is highly reversible. Upon 4 equivalents of lithiation, the structure becomes highly distorted, in correlation with capacity fade observed over 40 cycles. Notably, regarding capacity fade, modifications to Ag/Mn ratio are less impactful than modifications to the α-MnO2 crystallite size. This is shown in comparisons of two materials with the same stoichiometry (Ag1.4Mn8O16) and differing crystallite size (10 and 15 nm).

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*corresponding author: amy.marschilok@stonybrook.edu

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Review of the Stability/Capacity Trade-off in Silver Hollandite Lithium Battery Cathodes

  • Paul F. Smith (a1), Diana M. Lutz (a1), Esther S. Takeuchi (a1) (a2) (a3), Kenneth J. Takeuchi (a1) (a2) and Amy C. Marschilok (a1) (a2) (a3)...

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