Issue 46, 2014

Improvement of desolvation and resilience of alginate binders for Si-based anodes in a lithium ion battery by calcium-mediated cross-linking

Abstract

Si-based anodes in lithium ion batteries (LIBs) have exceptionally high theoretical capacity, but the use of a Si-based anode in LIBs is problematic because the charging–discharging process can fracture the Si particles. Alginate and its derivatives show promise as Si particle binders in the anode. We show that calcium-mediated “egg-box” electrostatic cross-linking of alginate improves toughness, resilience, electrolyte desolvation of the alginate binder as a Si-binder for LIBs. Consequently, the improved mechanical properties of the calcium alginate binder compared to the sodium alginate binder and other commercial binders extend the lifetime and increase the capacity of Si-based anodes in LIBs.

Graphical abstract: Improvement of desolvation and resilience of alginate binders for Si-based anodes in a lithium ion battery by calcium-mediated cross-linking

Supplementary files

Article information

Article type
Paper
Submitted
06 Aug 2014
Accepted
29 Sep 2014
First published
06 Oct 2014

Phys. Chem. Chem. Phys., 2014,16, 25628-25635

Author version available

Improvement of desolvation and resilience of alginate binders for Si-based anodes in a lithium ion battery by calcium-mediated cross-linking

J. Yoon, D. X. Oh, C. Jo, J. Lee and D. S. Hwang, Phys. Chem. Chem. Phys., 2014, 16, 25628 DOI: 10.1039/C4CP03499F

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