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1. A combination of lithium difluorophosphate and vinylene carbonate as reducible additives to improve cycling performance of graphite electrodes at high rates

Author

Koeun Kim, Jun Yeong Jang, Nam-Soon Choi, Woo-Cheol Shin, Inbok Park, Myung-Hwan Jeong, Woo Myungheui, and Makoto Ue

Subjects
Materials science, Inorganic chemistry, chemistry.chemical_element, Electrolyte, Lithium-ion battery, Anode, lcsh:Chemistry, chemistry, lcsh:Industrial electrochemistry, lcsh:QD1-999, Electrochemistry, Lithium, Graphite, Cycling, Electrical conductor, Graphite electrode, lcsh:TP250-261
Abstract

Lithium difluorophosphate (LiDFP) as a reducible additive is employed to overcome the unsatisfactory rate capability and cycling instability of highly pressed graphite electrodes with high mass loading (8.1 mg/cm2) with a vinylene carbonate (VC)-derived surface film that hampers the charge transport at the graphite–electrolyte interface at high rates. Our investigation reveals that LiDFP modifies the surface chemistry induced by VC and makes a more ionically conductive surface film on graphite, ensuring good rate capability. Keywords: Lithium–ion battery, Graphite, Anode, Electrolyte, Additive

Published
2015

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