In situ strain measurements and stress analysis of SiO@C composite electrodes during electrochemical cycling by using digital image correlation

Cuiying DAI, Caisheng LI, Huiyu HUANG, Zhuo WANG, Xiaoxue ZHU, Xiangbiao LIAO, Xi CHEN, Yong PAN*, Daining FANG

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

21 Citations (Scopus)

Abstract

SiO@C layer/copper foil composite electrode specimens were prepared and characterized by energy dispersive spectroscopy and thermogravimetric analysis methods, respectively. The related cycling performances, cyclic voltammetry and electrochemical impedance spectroscopy of SiO@C composite electrodes were discussed. Full/local strain field features of SiO@C composite electrodes were in situ measured during electrochemical cycles by designing a special electrolytic cell and digital image correlation technique. The corresponding stress variation characterizations of SiO@C composite electrode under different cycles were obtained by using a mechanical-chemical constitutive equation. The results are useful for revealing the volume expansion behaviors of SiO@C anode and the corresponding mechanical-chemical failure mechanisms. © 2019
Original languageEnglish
Pages (from-to)56-65
Number of pages10
JournalSolid State Ionics
Volume331
Early online date8 Jan 2019
DOIs
Publication statusPublished - Mar 2019
Externally publishedYes

Bibliographical note

This work was supported by the National Natural Science Foundation of China (Grant nos. 11372267, 11772287, 11802260), the Natural Science Foundation of Hunan Province (No. 2018JJ3490), and the Hunan Provincial Innovation Foundation for Postgraduate (CX2016B256).

Keywords

  • Digital image correlation
  • In situ strain measurement
  • Lithium-ion battery
  • SiO@C composite electrode
  • Stress evolution

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