4.6 Article Proceedings Paper

Influence of the binder and preparation process on the positive electrode electrochemical response and Li/S system performances

期刊

ELECTROCHIMICA ACTA
卷 210, 期 -, 页码 492-501

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.05.130

关键词

lithium sulfur batteries; positive electrode formulation; impedance spectroscopy

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In this study, the effect of the binder (PVdF and CMC/NBR) and the preparation process of sulfur electrode ink/slurry on electrochemical performance and cycling behaviour of Li/S cells was investigated. Well dispersed and homogeneous slurries obtained using high-energy mechanical dispersion (Dispermat (R) permit to decrease the impedance response of the electrodes and thus to improve the cycling performances at high C-rates. The main effect of CMC/NBR binder was mostly related to electrode adhesion properties, resulting in better cycle life. A detailed analysis of EIS data gives us an insight into electrode impedance response and their variation depending on the electrode fabrication process and nature/type of a binder. (C) 2016 Elsevier Ltd. All rights reserved.

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