Journal
ADVANCED MATERIALS
Volume 33, Issue 52, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202105917
Keywords
fire-resistant anodes; flexible electrodes; high mass loading; silicon nanowires; stainless-steel fiber cloths
Categories
Funding
- Science Foundation Ireland (SFI) [16/IA/4629, SFI 16/M-ERA/3419]
- European Union's Horizon 2020 Research and Innovation Program [814464]
- IReL
- Science Foundation Ireland (SFI) [16/IA/4629] Funding Source: Science Foundation Ireland (SFI)
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Silicon nanowires grown on a flexible stainless-steel fiber cloth exhibit stable performance in lithium-ion batteries, with potential for large-scale fabrication and practical application in high energy density LIBs.
Silicon nanowires (Si NWs) are a promising anode material for lithium-ion 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 approximate to 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 microscopy 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.
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