Bibliographic Details
| Title: |
Surface-initiated fluoride-scavenging polymeric layer on cathode materials for lithium-ion batteries. |
| Authors: |
Seo, Hyo Ree1, Lee, Hae Ri1, Kang, Dong-Ku2, Yim, Taeeun2 yte0102@inu.ac.kr, Oh, Si Hyoung1 sho74@kist.re.kr |
| Source: |
Journal of Industrial & Engineering Chemistry. Sep2017, Vol. 53, p425-428. 4p. |
| Subjects: |
Surface chemistry, Lithium manganese oxide, Chemical reactions, Electrode design & construction, Nuclear magnetic resonance spectroscopy |
| 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 19 F 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. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
