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- W2892150451 abstract "Abstract The very high specific capacity of Li metal makes it an ideal anode for high‐energy batteries. However, Li dendrite growth and the formation of isolated (or “dead”) Li during repeated Li plating/stripping processes leads to a low coulombic efficiency (CE). In this work, we discovered, for the first time, that electrode edge effects play an important role in the failure of Li‐metal batteries. The dead Li formed on the edge of Cu substrate was systematically investigated through SEM, energy‐dispersive X‐ray (EDX) spectroscopy, and 2D X‐ray photoelectron spectroscopy (XPS). To minimize the Li loss at the edge of the Cu exposed to pressure‐free space, a modified Li∥Cu cell configuration with a Cu electrode smaller than Li metal is preferred. It was clearly demonstrated that using an electrode configuration with a minimal open space or pressure‐free space across electrodes can reduce accumulation of dead Li during cycling and increase Li CE. This phenomenon was also verified in Li‐metal batteries (Li∥LiNi 1/3 Mn 1/3 Co 1/3 O 2 ) and should be considered in the design of practical Li‐metal batteries." @default.
- W2892150451 created "2018-09-27" @default.
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- W2892150451 date "2018-10-11" @default.
- W2892150451 modified "2023-09-30" @default.
- W2892150451 title "Electrode Edge Effects and the Failure Mechanism of Lithium-Metal Batteries" @default.
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- W2892150451 doi "https://doi.org/10.1002/cssc.201801445" @default.
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