Effect of size and shape on electrochemical performance of nano-silicon-based lithium battery - Archive ouverte HAL Access content directly
Journal Articles Nanomaterials Year : 2021

## Effect of size and shape on electrochemical performance of nano-silicon-based lithium battery

(1, 2, 3) , (4) , (1, 2, 3) , (1, 2) , (4, 3) , (4) , (1) , (4) , (3) , (1, 2)
1
2
3
4
Caroline Keller
Antoine Desrues
• Function : Author
Eléa Martin
• Function : Author
• PersonId : 1089817
Florent Boismain
• Function : Author
• PersonId : 1089818
Claire Villevieille
Nathalie Herlin-Boime
• Function : Author
• PersonId : 954688
Cédric Haon
• Function : Author
• PersonId : 1089819
Pascale Chenevier

#### Abstract

Silicon is a promising material for high-energy anode materials for the next generation of lithium-ion batteries. The gain in specific capacity depends highly on the quality of the Si dispersion and on the size and shape of the nano-silicon. The aim of this study is to investigate the impact of the size/shape of Si on the electrochemical performance of conventional Li-ion batteries. The scalable synthesis processes of both nanoparticles and nanowires in the 10–100 nm size range are discussed. In cycling lithium batteries, the initial specific capacity is significantly higher for nanoparticles than for nanowires. We demonstrate a linear correlation of the first Coulombic efficiency with the specific area of the Si materials. In long-term cycling tests, the electrochemical performance of the nanoparticles fades faster due to an increased internal resistance, whereas the smallest nanowires show an impressive cycling stability. Finally, the reversibility of the electrochemical processes is found to be highly dependent on the size/shape of the Si particles and its impact on lithiation depth, formation of crystalline Li$_{15}$Si$_4$ in cycling, and Li transport pathways.

#### Domains

Chemical Sciences Material chemistry

### Dates and versions

cea-03126698 , version 1 (01-02-2021)

### Identifiers

• HAL Id : cea-03126698 , version 1
• DOI :

### Cite

Caroline Keller, Antoine Desrues, Saravanan Karuppiah, Eléa Martin, John Alper, et al.. Effect of size and shape on electrochemical performance of nano-silicon-based lithium battery. Nanomaterials, 2021, 11 (2), pp.307. ⟨10.3390/nano11020307⟩. ⟨cea-03126698⟩

### Export

BibTeX TEI Dublin Core DC Terms EndNote Datacite

121 View