Understanding and Enhancing Silicon Nanoparticle Distribution during Electrode Processing

Wu, Bingbin; Quinn, Joseph; Li, Jingnan; Li, Qiuyan; Liu, Dianying; Martin, Witness; Baar, Kevin; Zhong, Lirong; Wang, Chongming; Xiao, Jie

doi:10.1149/1945-7111/ad4919

Understanding and Enhancing Silicon Nanoparticle Distribution during Electrode Processing

Journal Article · Tue May 21 00:00:00 EDT 2024 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1945-7111/ad4919· OSTI ID:2352498

Wu, Bingbin; Quinn, Joseph; Li, Jingnan; Li, Qiuyan; Liu, Dianying; Martin, Witness; Baar, Kevin; Zhong, Lirong; Wang, Chongming;

Silicon-dominant anodes are of great interest because of their potential to boost the cell-level energy of state-of-the-art Li-ion batteries. While silicon materials have been extensively studied, understanding interactions at the electrode level has recieved little attention, especially the coating process of Si particles, which plays an equally important role in unlocking the full potential of silicon anodes. Herein, the electrode processing of a Si-dominated anode (52.8 wt%, 3.5–4.5 mAh cm ⁻² ) is being investigated to understand the relationship of processing on the morphology and properties of Si anodes at the electrode level. It has been found that almost-undetectable Si agglomerates easily form during electrode processing, which grow into largeprotrusions after lithiation and trigger potential internal shorting and self-discharge problems. A facile slurry filtration step is proposed to homogenize the particle distribution within Si-dominant electrodes which improves the electrochemical performance and storage stability of Si-based Li ion batteries.

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Sponsoring Organization:: USDOE

OSTI ID:: 2352498

Alternate ID(s):: OSTI ID: 2349136

Journal Information:: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 5 Vol. 171; ISSN 0013-4651

Publisher:: The Electrochemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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