Preparation of Three Dimensionally Ordered Macroporous LiCoO2 Cathode for Lithium Batteries

Abstract:

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Macroporous LiCoO2 was prepared by a colloidal crystal templating method. Colloidal crystal consisting of monodisperse polystyrene particles was used as the template for the synthesis of macroporous LiCoO2. A Li-Co-O sol was injected into the template, and it was calcined at high temperatures. A porous membrane of LiCoO2 with three dimensionally ordered macroporous (3DOM) structure was obtained. The prepared material had a rock-salt type crystallographic structure with R3m space group. The interconnected macropores with relative uniform size (0.8~0.9 ;m) were observed on entire part of the membrane. The electrochemical properties of the 3DOM LiCoO2 were characterized with galvanostatic charge-discharge measurements in an organic electrolyte containing a lithium salt. The 3DOM LiCoO2 exhibited charge and discharge capacities of 136 and 107 mA h g-1, respectively, at around 3.9 V vs. Li/Li+, indicating that 3DOM LiCoO2 electrode had solid state redox reaction accompanying with Li+ ion insertion and extraction to CoO2 frameworks.

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Periodical:

Edited by:

K. Katayama, K. Kato, T. Takenaka, M. Takata and K. Shinozaki

Pages:

195-198

DOI:

10.4028/www.scientific.net/KEM.350.195

Citation:

S. W. Woo et al., "Preparation of Three Dimensionally Ordered Macroporous LiCoO2 Cathode for Lithium Batteries", Key Engineering Materials, Vol. 350, pp. 195-198, 2007

Online since:

October 2007

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$35.00

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