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Dense silicon nanowire networks grown on a stainless-steel fiber cloth: A flexible and robust anode for lithium-ion batteries
Date
2021
Abstract
Silicon nanowires (Si NWs) are a promising anode material for lithiumion batteries (LIBs) due to their high specific capacity. Achieving adequate mass loadings for binder-free Si NWs is restricted by low surface area, mechanically unstable and poorly conductive current collectors (CCs), as well as complicated/expensive fabrication routes. Herein, a tunable mass loading and dense Si NW growth on a conductive, flexible, fire-resistant, and mechanically robust interwoven stainless-steel fiber cloth (SSFC) using a simple glassware setup is reported. The SSFC CC facilitates dense growth of Si NWs where its open structure allows a buffer space for expansion/ contraction during Li-cycling. The Si NWs@SSFC anode displays a stable performance for 500 cycles with an average Coulombic efficiency of >99.5%. Galvanostatic cycling of the Si NWs@SSFC anode with a mass loading of 1.32 mg cm−2 achieves a stable areal capacity of ≈2 mAh cm−2 at 0.2 C after 200 cycles. Si NWs@SSFC anodes with different mass loadings are characterized before and after cycling by scanning and transmission electron micros-copy to examine the effects of Li-cycling on the morphology. Notably, this approach allows the large-scale fabrication of robust and flexible binder-free Si NWs@SSFC architectures, making it viable for practical applications in high energy density LIBs.
Supervisor
Description
peer-reviewed
Publisher
John Wiley & Sons, Inc.
Citation
Advanced Materials;2105917
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Files
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Imtiaz_2021_Dense.pdf
Adobe PDF, 4.55 MB
Keywords
Funding code
Funding Information
Science Foundation Ireland (SFI), Horizon 2020, European Research Council (ERC)
Sustainable Development Goals
External Link
Type
Article
Rights
https://creativecommons.org/licenses/by-nc-sa/1.0/