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http://dx.doi.org/10.4191/kcers.2011.48.6.636

Lithium Electroactivity of Cobalt Oxide Nanoparticles Synthesized Using Thermolysis Process  

Jin, Yun-Ho (Department of Materials Science and Engineering, Ajou University)
Shim, Hyun-Woo (Department of Materials Science and Engineering, Ajou University)
Kim, Dong-Wan (Department of Materials Science and Engineering, Ajou University)
Publication Information
Journal of the Korean Ceramic Society / v.48, no.6, 2011 , pp. 636-640 More about this Journal
Abstract
Nano-sized cobalt (II) oxide nanoparticles with a high crystallinity were synthesized using thermolysis of a $Co^{2+}$-oleate precursor at 310$^{\circ}C$. The phase and morphology of as-prepared cobalt oxide nanoparticles were characterized using X-ray diffraction, high-resolution transmission electron microscopy, and Brunauer-Emmett-Teller surface area measurements. The cobalt oxide nanoparticles were found to be spherical nanoclusters with an average diameter of approximately 200 nm, consisting of tiny nanocrystals (10-20 nm). Furthermore, the Li electroactivites of the cobalt oxide nanoparticles were investigated using cyclic voltammetry and galvanostatic cycling. The cobalt oxide nanoparticles could deliver high capacities over 420 mA h $g^{-1}$ at a C/5 current rate.
Keywords
Cobalt oxides; Thermolysis; Nanoparticles; Electroactivity; Capacity;
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