Non-Invasive in Situ Dynamic Monitoring of Elastic Properties of Composite Battery Electrodes by EQCM-D

Netanel Shpigel, Mikhael D. Levi, Sergey Sigalov, Olga Girshevitz, Doron Aurbach, Leonid Daikhin, Nicolas Jäckel, Volker Presser

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Reversible Li-ion intercalation into composite Li-ion battery (LIB) electrodes is often accompanied by significant dimensional electrode changes (deformation) resulting in significant deterioration of the cycling performance. Viscoelastic properties of polymeric binders affected by intercalation-induced deformation of composite LIB electrodes have never been probed in situ on operating electrochemical cells. Here, we introduce a newly developed noninvasive method, namely electrochemical quartz-crystal microbalance with dissipation monitoring (EQCM-D), for in situ monitoring of elastic properties of polymeric binders during charging of LIB electrodes. As such, we find EQCM-D as a uniquely suitable tool to track the binder's structural rigidity/softness in composite Li insertion electrodes in real-time by the characteristic increase/decrease of the dissipation factor during the charging-discharging process. The binders partially swollen in aprotic solutions demonstrate intermediate viscoelastic charge-rate-dependent behavior, revealing rigid/soft behavior at high/low charging rates, respectively. The method can be adjusted for continuous monitoring of elastic properties of the polymeric binders over the entire LIB electrodes cycling life.

Original languageEnglish
Pages (from-to)12353-12356
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number42
StatePublished - 1 Oct 2015
Externally publishedYes


  • Li-ion batteries
  • deformations
  • polymeric binders
  • quartz-crystal microbalance
  • viscoelasticity


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