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Understanding the Effect of Polydopamine Interlayer onthe Long-Term Cycling Performance of Silicon Anodes: AMultiphysics-Based Model Study

Title
Understanding the Effect of Polydopamine Interlayer onthe Long-Term Cycling Performance of Silicon Anodes: AMultiphysics-Based Model Study
Authors
Appiah, Williams AgyeiKim, DohwhanSong, JihunRyou, Myung‐HyunLee, Yong M.
DGIST Authors
Lee, Yong M.
Issue Date
ACCEPT
Citation
Batteries & Supercaps
Type
Article
Article Type
Article
Author Keywords
Lithium-ion batteries; Adhesion property; Silicon electrode; Polydopamine interlayer; Capacity fade analysis
ISSN
2566-6223
Abstract
To understand the effect of a polydopamine interlayer between a copper current collector and a silicon composite electrode, a physics‐based model is used to analyze the cycle performance of silicon‐based lithium‐ion half‐cells with bare and polydopamine‐treated copper current collectors. We investigate the capacity‐fading mechanisms of the two cell configurations by analyzing the model parameters that change with cycling. The major capacity‐fading mechanisms in the silicon‐based anodes are the increase in film resistance (solid electrolyte interphase resistance and contact resistance) and the isolation of silicon active material. The polydopamine interlayer reduced the contribution of the film resistance and isolation of the silicon active material to the capacity fade by 22 % and 10 %, respectively. The insulating‐nature of the polydopamine interlayer resulted in an increase in the charge transfer resistance contributing to 15 % reduction in the capacity retention. The efficacy of the physics‐based model is validated with experimental data obtained from silicon‐based half‐cells with bare and polydopamine‐treated copper current collectors.
URI
http://hdl.handle.net/20.500.11750/9884
DOI
10.1002/batt.201900019
Publisher
Wiley
Related Researcher
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles


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