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Synergetic Effect of Hybrid Conductive Additives for High-Capacity and Excellent Cyclability in Si Anodes.
- Source :
-
Nanomaterials (2079-4991) . Oct2022, Vol. 12 Issue 19, p3354. 11p. - Publication Year :
- 2022
-
Abstract
- Silicon is a promising anode material that can increase the theoretical capacity of lithium-ion batteries (LIBs). However, the volume expansion of silicon remains a challenge. In this study, we employed a novel combination of conductive additives to effectively suppress the volume expansion of Si during charging/discharging cycles. Rather than carbon black (CB), which is commonly used in SiO anodes, we introduced single-walled carbon nanotubes (SWCNTs) as a conductive additive. Owing to their high aspect ratio, CNTs enable effective connection of SiO particles, leading to stable electrochemical operation to prevent volume expansion. In addition, we explored a combination of CB and SWCNTs, with results showing a synergetic effect compared to a single-component of SWCNTs, as small-sized CB particles can enhance the interface contact between the conductive additive and SiO particles, whereas SWCNTs have limited contact points. With this hybrid conductive additive, we achieved a stable operation of full-cell LIBs for more than 200 cycles, with a retention rate of 91.1%, whereas conventional CB showed a 74.0% specific capacity retention rate. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ANODES
*CARBON-black
*CARBON nanotubes
*ADDITIVES
*LITHIUM-ion batteries
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 12
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 159666171
- Full Text :
- https://doi.org/10.3390/nano12193354