Low-cost open-space scaffold structure for high-capacity silicon anode

N. Aloni, D. Golodnitsky*, E. Peled

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


One of the causes of capacity fading in cells containing silicon anodes is the growth of a secondary SEI. A possible way of solving this problem is to create an anode with a highly porous three-dimensional structure, in which the growing SEI could be accommodated without blocking conduction pathways inside the anode. We evaluated this approach by building a 3D carbon-fiber (CF) scaffold matrix made by the pyrolysis of cotton wool. Anodes fabricated from bare and carbon-coated silicon nanoparticles, were studied from the viewpoint of the influence of anode structure and LixSi phase transformations on prolonged cycling of Li/Si cells. Analysis of the mechanisms of degradation of silicon anodes in lithium-ion batteries provides possible ways of elimination of the negative effect of the growth of the SEI on capacity fading. It will be noted that all the anodes containing cotton-carbon fiber matrix exhibit much more stable cycle life than do CF-free anodes. The synthesis of the carbon-fiber (CF) scaffold matrix is simple and easy to scale up to industrial production.

Original languageEnglish
Pages (from-to)228-233
Number of pages6
JournalSolid State Ionics
StatePublished - Jun 2018


FundersFunder number
MARS EU609201, 204443-02


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