Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep30952
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Funding
- National Science Foundation under CAREER award [1351386]
- Research and Economic Development office at UC Riverside via the Seed Grant Program
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1351386] Funding Source: National Science Foundation
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We have found that the addition of tin nanoparticles to a silicon-based anode provides dramatic improvements in performance in terms of both charge capacity and cycling stability. Using a simple procedure and off-the-shelf additives and precursors, we developed a structure in which the tin nanoparticles are segregated at the interface between the silicon-containing active layer and the solid electrolyte interface. Even a minor addition of tin, as small as similar to 2% by weight, results in a significant decrease in the anode resistance, as confirmed by electrochemical impedance spectroscopy. This leads to a decrease in charge transfer resistance, which prevents the formation of electrically inactive dead spots in the anode structure and enables the effective participation of silicon in the lithiation reaction.
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