Material design concept for Fe-substituted Li 2MnO 3-based positive electrodes

Fe-substituted Li 2MnO 3 (Li 1+ x (Fe y Mn 1− y ) 1− x O 2, 0 ≤ x ≤ 1/3, 0.3 ≤ y ≤ 0.7) was synthesized using a combination of coprecipitation, hydrothermal, and heat-treatment methods. It exhibits high initial specific capacity greater than 200 mAh g −1 and small capacity, which fades up to the 50t...

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Published inJournal of power sources Vol. 174; no. 2; pp. 554 - 559
Main Authors Tabuchi, Mitsuharu, Nabeshima, Yoko, Ado, Kazuaki, Shikano, Masahiro, Kageyama, Hiroyuki, Tatsumi, Kuniaki
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2007
Subjects
Fe-substituted
Lithium-ion batteries
XRD
Lithium-ion batteries
XRD
Fe-substituted
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Summary:Fe-substituted Li 2MnO 3 (Li 1+ x (Fe y Mn 1− y ) 1− x O 2, 0 ≤ x ≤ 1/3, 0.3 ≤ y ≤ 0.7) was synthesized using a combination of coprecipitation, hydrothermal, and heat-treatment methods. It exhibits high initial specific capacity greater than 200 mAh g −1 and small capacity, which fades up to the 50th cycle (>150 mAh g −1 at the 50th cycle) under electrochemical cycle testing at 60 °C. The attractive electrode properties appeared by controlling the chemical composition ( x > 0.05, 0.3 ≤ y ≤ 0.5) and high specific surface area (>20 m 2 g −1). The Fe-substituted Li 2MnO 3 is an attractive candidate as a novel 3 V-class positive electrode material.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2007.06.247