التفاصيل البيبلوغرافية
| العنوان: |
Non-Invasive In Situ Dynamic Monitoring of Elastic Properties of Composite Battery Electrodes by EQCM-D. |
| المؤلفون: |
Shpigel, Netanel1, Levi, Mikhael D.1, Sigalov, Sergey1, Girshevitz, Olga1, Aurbach, Doron1, Daikhin, Leonid2, Jäckel, Nicolas3,4, Presser, Volker3,4 |
| المصدر: |
Angewandte Chemie. Oct2015, Vol. 127 Issue 42, p12530-12533. 4p. |
| مصطلحات موضوعية: |
*ELECTRODE potential, *ELECTRIC resistors, *ELECTROCHEMICALS industry, *INTERCALATION reactions, *ANTIMICROBIAL polymers |
| مستخلص: |
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. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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