A thermodynamic investigation of the Ag-Mn system

Krenzer, R. W.; Pool, M. J.

doi:10.1007/bf02664234

Cited by 7 publications

(2 citation statements)

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“…According to thermodynamic phase diagrams, a couple of Ag and Co phases do not form any alloy phases and the solubility of Co in Ag is about 0.02 atom % at 600 °C. The combination of the Ag and Mn phases can form a solid solution; the solubility of Mn in Ag is about 27 atom % at 600 °C. , Thus, it is hypothesized that the incorporated Ag phase should maintain its pristine metallic nature during repeated discharging/charging processes, so that the Ag nanophase in transition metal oxide-based anodes can catalyze the formation of reversible gel-like/polymeric SEI layers.…”

Section: Resultsmentioning

confidence: 99%

“…25,26 Thus, it is hypothesized that the incorporated Ag phase should maintain its pristine metallic nature during repeated discharging/charging processes, so that the Ag nanophase in transition metal oxide-based anodes can catalyze the formation of reversible gel-like/polymeric SEI layers. CoO NPs were synthesized via chemical reduction of cobalt ions in octylamine and phenylhydrzine as described in our previous work 9.…”

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Understanding the Critical Role of the Ag Nanophase in Boosting the Initial Reversibility of Transition Metal Oxide Anodes for Lithium-Ion Batteries

Lee

Kim³

et al. 2017

ACS Appl. Mater. Interfaces

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The initial reversible capacity, a critical impediment in transition metal oxide-based anodes, is augmented in conversion-reaction-involved CoO anodes for lithium-ion batteries, by incorporating a chemically synthesized Ag nanophase. With an increase in the added amount of Ag nanophase from 5 to 15 wt %, the initial capacity loss decreases linearly up to 31.7%. The Ag nanophase maintains its pristine metallic nature without undergoing phase transformations, even during repeated vigorous electrochemical reactions of the active CoO phase. Complementary ex situ chemical/physical analyses suggest that the Ag nanophase promotes the catalytic generation of reversible gel-like/polymeric films wherein lithium ions are stored capacitively in the low-voltage region below 0.7 V during discharging. These scientific findings would provide a heretofore unrecognized pathway to resolving a major issue associated with the critical irreversibility in conversion-type transition metal oxide anodes.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%