Combination of acid-resistor and -scavenger improves the SEI stability and cycling ability of tin–nickel battery anodes in LiPF6-containing electrolyte

Control of electrode–electrolyte interfacial reactivity and the formation of the solid electrolyte interphase (SEI) layer is a key technology for high performance rechargeable lithium batteries. Here we present the first report on a promising interfacial approach for Sn–Ni electrode that the use of...

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Bibliographic Details
Published in:Electrochimica acta 2013-12, Vol.112, p.252-257
Main Authors: Choo, Myeong-Ho, Nguyen, Cao Cuong, Hong, Sukhyun, Kwon, Yo Han, Woo, Sang-Wook, Kim, Je Young, Song, Seung-Wan
Format: Article
Language:English
Subjects:
Additives
Anode
Carbonates
Cycles
Electrodes
Electrolytes
Inorganic salts
Interfacial control
Rechargeable lithium batteries
Solid electrolyte interphase
Stability
Tin
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Summary:Control of electrode–electrolyte interfacial reactivity and the formation of the solid electrolyte interphase (SEI) layer is a key technology for high performance rechargeable lithium batteries. Here we present the first report on a promising interfacial approach for Sn–Ni electrode that the use of acid-resisting and -scavenging fluorine-dopant on Sn combined with acid-scavenging trimethyl phosphite electrolyte additive to LiPF6-contiaing carbonate-based organic electrolyte improves the interfacial stability of Sn to acidic electrolyte species. As a result, a stable SEI layer consisting of a plenty of carbonate decomposition products forms and cycling ability significantly improves, in contrast to less efficient SEI formation and rapid performance fade for the electrodes without fluorine-dopant or trimethyl phosphite additive.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2013.08.121