| 열분해 공정을 통해 합성된 산화 코발트 나노입자의 리튬 전기화학반응성 |
| 진연호, 심현우, 김동완 |
| 아주대학교 재료공학과 |
| Lithium Electroactivity of Cobalt Oxide Nanoparticles Synthesized Using Thermolysis Process |
| Yun-Ho Jin, Hyun-Woo Shim, Dong-Wan Kim |
| Department of Materials Science and Engineering, Ajou University |
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| ABSTRACT |
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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. |
| Key words:
Cobalt oxides, Thermolysis, Nanoparticles, Electroactivity, Capacity |
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