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Mechanism of Interactions between CMC Binder and Si Single Crystal Facets
Ist Teil von
Langmuir, 2014-09, Vol.30 (34), p.10299-10307
Ort / Verlag
United States: American Chemical Society
Erscheinungsjahr
2014
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Interactions of the active material particles with the binder are crucial in tailoring the properties of composite electrodes used in lithium-ion batteries. The dependency of the protonation degree of the carboxyl group in the carboxymethyl cellulose (CMC) structure on the pH value of the preparation solution was investigated by Fourier transform infrared spectroscopy (FTIR). Three different distinctive chemical states of CMC binder were chosen (protonated, deprotonated, and half–half), and their interactions with different silicon single crystal facets were investigated. The different Si surface orientations display distinct differences of strength of interactions with the CMC binder. The CMC/Si adhesion forces in solution and Si wettability of the silicon are also strongly dependent on the protonation degree of the CMC. This work provides an insight into the nature of these interactions, which determine the electrochemical performance of silicon composite electrodes.
Sprache
Englisch
Identifikatoren
ISSN: 0743-7463
eISSN: 1520-5827
DOI: 10.1021/la501791q
Titel-ID: cdi_proquest_miscellaneous_1559623982
Format
–
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