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Novel Method Based on Spin-Coating for the Preparation of 2D and 3D Si-Based Anodes for Lithium Ion Batteries

Authors :
Marie Gabard
Mustapha Zaghrioui
David Chouteau
Virginie Grimal
Thomas Tillocher
Fouad Ghamouss
Nathalie Poirot
Source :
ChemEngineering, Vol 1, Iss 1, p 5 (2017)
Publication Year :
2017
Publisher :
MDPI AG, 2017.

Abstract

The present study describes a novel strategy for preparing thin Silicon 2D and 3D electrodes for lithium ion batteries by a spin coating method. A homogeneous and stable suspension of Si nanoparticles (SiNPs) was prepared by dispersing the nanoparticles in 1-methyl-2-pyrrolidone (NMP) or in the room temperature ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Pyr14TFSI). This proposed methodology was successfully employed to prepare 2D and 3D with different aspect ratios electrodes. Both 2D and 3D materials were then used as anode materials. The 2D SiNPs anodes exhibit a high reversible capacity, which is close to 3500 mAh·g−1 at C/10. For a higher discharge rate, the capacity of the 2D anode is considerably improved by dispersing the nanoparticles in Pyr14TFSI instead of NMP solvent. In order to further improve the anode performances, graphene particles were added to the SiNPs suspension. The anodes prepared using this suspension method exhibit relatively low columbic efficiency during the first few cycles (less than 30%) and low reversible capacity (2800 mAh·g−1 at C/10). The 3D SiNPs (NMP) electrode shows a higher intensity during cyclic voltammograms and a better stability under galvanostatic cycling than the 2D SiNPs (NMP) electrode.

Details

Language :
English
ISSN :
23057084
Volume :
1
Issue :
1
Database :
Directory of Open Access Journals
Journal :
ChemEngineering
Publication Type :
Academic Journal
Accession number :
edsdoj.05f897351c534f2ca92b059e30dd342e
Document Type :
article
Full Text :
https://doi.org/10.3390/chemengineering1010005