In Situ Monitoring of Gravimetric and Viscoelastic Changes in 2D Intercalation Electrodes

Netanel Shpigel, Maria R. Lukatskaya, Sergey Sigalov, Chang E. Ren, Prasant Nayak, Mikhael D. Levi, Leonid Daikhin, Doron Aurbach, Yury Gogotsi

Research output: Contribution to journalReview articlepeer-review

52 Scopus citations

Abstract

Viscoelastic properties of battery electrodes in contact with electrolyte solutions may affect the electrodes' cycling performance. However, they are not easily assessed by in situ measurements. Herein, we show that an electrochemical quartz-crystal microbalance with dissipation (EQCM-D) enables extraordinary sensitive probing of intrinsic electrodes materials' properties such as intercalation-induced gravimetric and viscoelastic changes, using Ti3C2(OH)2 (MXene) as a classical 2D intercalation model material. The insertion of each Li-ion into thin electrodes comprising this MXene is accompanied by insertion of one water molecule. Solvent-dependent viscoelastic changes and periodic stiffening/softening upon fully reversible Li-ion intercalation/deintercalation into an MXene electrode correlates well with its excellent long-term cycling performance. The experimental platform based on a commercial instrument, EQCM-D monitoring, and advanced viscoelastic modeling (extended Voight-type model) can be used for in situ real time characterization of intrinsic materials' properties of practical composite battery electrodes important for a deeper understanding of the factors controlling their cycling performance.

Original languageEnglish
Pages (from-to)1407-1415
Number of pages9
JournalACS Energy Letters
Volume2
Issue number6
DOIs
StatePublished - 9 Jun 2017

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

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