In-situ strain characterization and stress analysis of SnO2@graphite@CNT electrodes for lithium-ion batteries by digital image correlation method

In this study, SnO2@graphite@CNT composite was synthesized by growing SnO2 nanoparticles within the interconnected three-dimensional network of graphite and carbon nanotubes using an acoustic chemistry method and a followed annealing treatment. As anode material for lithium-ion batteries, the compos...

Full description

Saved in:
Bibliographic Details
Published in:Solid state ionics 2023-10, Vol.399, p.116319, Article 116319
Main Authors: Wen, Ze, Dai, Cuiying, Tang, Jiaping, Yang, Mei, Gao, Hongbin, Mao, Weiguo, Wang, Zhuo, Pan, Junan, Pan, Yong
Format: Article
Language:English
Subjects:
Deformation characterization
Digital image correlation
Lithiation induced stress
Lithium-ion batteries
SnO2@graphite@CNT anode
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, SnO2@graphite@CNT composite was synthesized by growing SnO2 nanoparticles within the interconnected three-dimensional network of graphite and carbon nanotubes using an acoustic chemistry method and a followed annealing treatment. As anode material for lithium-ion batteries, the composite exhibits high specific capacity and excellent cycling stability. The deformation behavior of the SnO2@graphite@CNT electrodes was in-situ monitored and recorded during discharge-charge process, and the strain fields onto the electrode surface was analyzed using digital image correlation technique. The dynamic evolution of plane stress in the electrode was evaluated by combining strain data with a mechano-electrochemical constitutive equation, and the contributions of mechanical and electrochemical parts to the plane stress also be discussed, respectively. The results provide valuable insights into the volume deformation behavior and mechano-electrochemical failure mechanism of SnO2-based electrodes for lithium-ion batteries. •SnO2/graphite/CNT composite as anode material for lithium-ion batteries was synthesized.•The deformation behavior of SnO2/graphite/CNT electrodes were in-situ monitored.•The dynamic evolution of plane stress in the electrodes was evaluated.•The contributions of mechanical and electrochemical parts to the plane stress were analyzed.•The mechano-electrochemical coupling mechanism for SnO2/graphite/CNT electrodes was discussed.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2023.116319