Back to Search Start Over

Carbon black SP is a carbon material more suitable for SiOx than graphite.

Carbon black SP is a carbon material more suitable for SiOx than graphite.

Authors :
Song, Chunyang
Zhang, Feilong
Qiao, Yafei
Tian, Shuang
He, Zhilong
Gao, Jie
Xia, Yonggao
Source :
Journal of Power Sources. Jan2025, Vol. 627, pN.PAG-N.PAG. 1p.
Publication Year :
2025

Abstract

To enhance the cycle stability of the SiOx anode in high-energy-density lithium-ion batteries from the perspective of electrode formulation, this paper investigates why SP is more suitable for SiOx than Gr, as well as the influence of SP content on the performance of the SiOx anode. The findings reveal that, compared to Gr, SP exhibits superior ionic conductivity. Moreover, the carbon binder domains (CBD) network formed by SP and the binder demonstrates a more effective buffering capacity against the volume expansion of SiOx than that of Gr. Additionally, SP is observed to elevate the lithium intercalation potential of SiOx, thereby endowing SiOx with a higher specific capacity. Nonetheless, the use of SP also introduces several challenges. On one hand, it can induce uneven lithium deposition on the composite electrode, leading to electrode cracking. On the other hand, the very low initial coulombic efficiency (ICE) of SP results in an irreversible loss of lithium ions on the cathode electrode side in a full cell configuration. Consequently, when designing a full cell, it is imperative to consider the inherent characteristics of SP, and optimization can be achieved by adjusting the negative/positive capacity ratio (N/P) or employing prelithiation methods. • Investigating the Voltage Plateau and Cyclic Performance of SP. • SP reduces the ICE of the electrode but increases the specific capacity of SiOx. • The addition of SP promotes the formation of a more stable SEI film on SiOx. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03787753
Volume :
627
Database :
Academic Search Index
Journal :
Journal of Power Sources
Publication Type :
Academic Journal
Accession number :
181224035
Full Text :
https://doi.org/10.1016/j.jpowsour.2024.235779