Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202217538
Keywords
Electrochemical Interfaces; Electronically Conductive Fillers; Lithium Metal; Solid-Polymer Electrolytes
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Electronic conduction in solid-polymer electrolytes is usually undesirable as it can cause electron leakage and energy loss, as well as electrolyte decomposition and shorting issues. However, this study finds that conductive domains in an insulating matrix could have positive effects on electrolyte performance with proper control. The research evaluates the limitations and benefits of electronically conductive domains and discusses approaches to improve electrolyte properties.
Electronic conduction in solid-polymer electrolytes is generally not desired, which causes leakage of electrons or energy loss, and the electronically conductive domains at electrode-electrolyte interfaces can lead to continuous decomposition of electrolytes and shorting issues. However, it is noticed in this work that in an insulating matrix, the conductive domains at certain aspects could also have positive effects on the electrolyte performance with proper control. This work evaluates the limitation and benefits of electronically conductive domains in a solid-polymer electrolyte system and discusses the approach to improve the electrolyte physicochemical properties with densified local electric field distribution, enhanced bulk dielectric property, and charge transfer. By deliberately introducing the conductive domains in a regular solid-polymer electrolyte, stable cycle life, low overpotential, and promising full cell performance could be achieved.
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