Improvement of electrochemical properties of LiNi0.5Mn1.5O4 spinel material by fluorine substitution
- Authors
- Oh, Sung-Woo; Park, Sang-Ho; Kim, Jung-Hyun; Bae, Young Chan; Sun, Yang-Kook
- Issue Date
- Jun-2006
- Publisher
- ELSEVIER
- Keywords
- lithium secondary battery; cathode material; spray pyrolysis; 5 V spinel; fluroine substitution; rate capability
- Citation
- JOURNAL OF POWER SOURCES, v.157, no.1, pp.464 - 470
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 157
- Number
- 1
- Start Page
- 464
- End Page
- 470
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181395
- DOI
- 10.1016/j.jpowsour.2005.07.056
- ISSN
- 0378-7753
- Abstract
- LiNi0.5Mn1.5O4-xFx (0 <= x <= 0.1) cathodes, synthesized by ultrasonic spray pyrolysis at 900 degrees C, exhibit superior structural and electrochemical properties. The samples are characterized by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, and electrochemical measurements. During Li+ extraction, LiNi0.5Mn1.5O4Fx, has a smaller lattice variation and area-specific impedance than LiNi0.5Mn1.5O4. This enhances the rate capability, especially at high C-rates. LiNi0.5Mn1.5O4-xFx also exhibits better resistance than LiNi0.5Mn1.5O4 to attack by HF.
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