Competitive Current Modes for Tunable Ni-Sn Electrodeposition and Their Lithiation/Delithiation Properties
作者： Lance R. Hoffman , Callum Breene , Abdoulaye Diallo , Ridwanur R. Chowdhury , Hitomi Mukaibo
DOI: 10.1007/S11837-016-2067-Y
关键词:
摘要: Li-ion battery (LIB) anodes with graded composition have the potential to relax interfacial stress and better accommodate internal buildup within anode during operation. A one-dimensional numerical model was developed, where balance between two competitive current modes (electrokinetic reaction-limited diffusion-limited current) defines deposit composition. The indicated that of a binary alloy can be varied overpotential, by decreasing relative concentration more noble element in plating bath. Indeed, when Ni-Sn electrodeposited from Ni2+:Sn2+=50:1 bath, fraction Sn decreased, 0.47 0.13, increasing density. Under this condition, deposits were prepared uniform, discretized gradient changes deposition Cyclic voltammetry these samples demonstrated both reversible irreversible reactions Li-ion, offering promising premise for LIB application.
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