Surface-initiated fluoride-scavenging polymeric layer on cathode materials for lithium-ion batteries

Title
Surface-initiated fluoride-scavenging polymeric layer on cathode materials for lithium-ion batteries
Authors
오시형이해리서효리강동구임태은
Keywords
lithium manganese oxides; spinel; poly(dimethylsiloxane); fluoride scavenging; manganese dissolution
Issue Date
2017-09
Publisher
Journal of industrial and engineering chemistry
Citation
VOL 53-428
Abstract
Spinel-structured lithium manganese oxides (LMOs) suffer from manganese dissolution at elevated temperatures, which leads to severe capacity fading. In this work, a novel strategic approach was developed to alleviate this phenomenon by using poly(dimethylsiloxane) (PDMS) as a simple and scalable electrode additive. LMO electrodes containing finely dispersed PDMS were prepared using a conventional electrode coating process. Electrochemical studies showed that the PDMS-dispersed LMO electrodes had significantly improved cycling retentions. Ex-situ FT-IR and F-19 NMR spectra indicated PDMS chemically scavenged the F- species, which cause manganese dissolution in LMO-based cells. In addition, a plausible mechanism was proposed based on the spectroscopic evidences.
URI
http://pubs.kist.re.kr/handle/201004/66702
ISSN
1226-086X
Appears in Collections:
KIST Publication > Article
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