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Preparation of Three Dimensionally Ordered Macroporous LiCoO2 Cathode for Lithium Batteries

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Abstract:

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:

Key Engineering Materials (Volume 350)

Pages:

195-198

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.350.195

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Online since:

October 2007

Authors:

Sang Wook Woo, Hiroyuki Nakano, Kaoru Dokko, Kiyoshi Kanamura

Keywords:

Colloidal Crystal Templating, Lithium Battery, Macroporous Material, Sol-Gel (SG)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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