Please use this identifier to cite or link to this item: doi:10.22028/D291-29109
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Title: In situ multi-length scale approach to understand the mechanics of soft and rigid binder in composite lithium ion battery electrodes
Author(s): Jäckel, Nicolas
Dargel, Vadim
Shpigel, Netanel
Sigalov, Sergey
Levi, Mikhael D.
Daikhin, Leonid
Aurbach, Doron
Presser, Volker
Language: English
Title: Journal of Power Sources
Volume: 371
Startpage: 162
Endpage: 166
Publisher/Platform: Elsevier
Year of Publication: 2017
Publikation type: Journal Article
Abstract: Intercalation-induced dimensional changes of composite battery electrodes containing either a stiff or a soft polymeric binder is one of the many factors determining the cycling performance and ageing. Herein, we report dimensional changes in bulk composite electrodes by in situ electrochemical dilatometry (eD) combined with electrochemical quartz-crystal microbalance with dissipation monitoring (EQCM-D). The latter tracks the mechanical properties on the level of the electrode particle size. Lithium iron phosphate (LiFePO4, LFP) electrodes with a stiff binder (PVdF) and a soft binder (NaCMC) were investigated by cycling in lithium sulfate (Li2SO4) aqueous solution. The electrochemical and mechanical electrode performances depend on the electrode cycling history. Based on combined eD and EQCM-D measurements we provide evidence which properties are preferred for a binder used for a composite Li-ion battery electrode.
DOI of the first publication: 10.1016/j.jpowsour.2017.10.048
Link to this record: hdl:20.500.11880/28052
ISSN: 0378-7753
Date of registration: 10-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:UniBib – Die Universitätsbibliographie

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