Improvement of electrochemical properties of LiNi0.5Mn1.5O4 spinel material by fluorine substitution

Oh, Sung-Woo; Park, Sang-Ho; Kim, Jung-Hyun; Bae, Young Chan; Sun, Yang-Kook

doi:10.1016/j.jpowsour.2005.07.056

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Improvement of electrochemical properties of LiNi0.5Mn1.5O4 spinel material by fluorine substitution

Oh, Sung-Woo;
Park, Sang-Ho;
Kim, Jung-Hyun;
Bae, Young Chan;
Sun, Yang-Kook

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WEB OF SCIENCE

117

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122

초록

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.

키워드

lithium secondary battery; cathode material; spray pyrolysis; 5 V spinel; fluroine substitution; rate capability; CATHODE MATERIAL; LITHIUM; VOLTAGE; BATTERIES

제목: Improvement of electrochemical properties of LiNi0.5Mn1.5O4 spinel material by fluorine substitution

저자: Oh, Sung-Woo; Park, Sang-Ho; Kim, Jung-Hyun; Bae, Young Chan; Sun, Yang-Kook

DOI: 10.1016/j.jpowsour.2005.07.056

발행일: 2006-06

유형: Article

저널명: Journal of Power Sources

권: 157

호: 1

페이지: 464 ~ 470