Orthorhombic LiMnO{sub 2} as a high capacity cathode for Li-ion cells

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2048663· OSTI ID:122713

Koetschau, I; Richard, M N; Dahn, J R ^[1]; Soupart, J B; Rousche, J C ^[2]

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1. Simon Fraser Univ., Burnaby, British Columbia (Canada). Dept. of Physics
2. Sedema, Tertre (Belgium)

Orthorhombic LiMnO{sub 2} prepared at temperatures near 100 C was evaluated for suitability as a high-capacity cathode for Li-ion cells. Carbon/LiMnO{sub 2} test cells showed initial reversible capacities of about 170 mAh/g of LiMnO{sub 2}. This is much larger than that typically obtained from carbon/LiMn{sub 2}O{sub 4} cells, about 110 mAh/g. The capacity of the LiMnO{sub 2} cells is divided approximately equally between 3 and 4 V plateaus. The cells exhibit little capacity loss with cycle number when restricted to either the 3 or the 4 V plateau. The capacity loss is most rapid when the cells are cycled over both plateaus. Using Li/LiMnO{sub 2} cells, the authors investigated the reasons for the cycling behavior and capacity loss with cycle number. They believe that LiMnO{sub 2} is an excellent candidate for the cathode of the coming generation of low-cost, high-energy Li-ion cells.

• Sponsoring Organization: USDOE
• OSTI ID: 122713
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 9 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

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