From cobalt nitrate carbonate hydroxide hydrate nanowires to porous Co<sub>3</sub>O<sub>4</sub> nanorods for high performance lithium-ion battery electrodes
Zhang, Hui; Wu, Jianbo; Zhai, Chuanxin; Ma, Xiangyang; Du, Ning; Tu, Jiangping; Yang, Deren; Yang, Deren;; Zhang, Hui; State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China; Wu, Jianbo; State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China; Zhai, Chuanxin; State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China; Ma, Xiangyang; State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China; Du, Ning; State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China; Tu, Jiangping; State Key Lab of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
Журнал:
Nanotechnology
Дата:
2008-01-23
Аннотация:
We have developed a simple approach for the large-scale synthesis of cobalt nitrate carbonate hydroxide hydrate (Co(CO<sub>3</sub>)<sub>0.35</sub>(NO<sub>3</sub>)<sub>0.2</sub>(OH)<sub>1.1</sub>·1.74H<sub>2</sub>O) nanowires via the hydrothermal process using sodium hydroxide and formaldehyde as mineralizers at 120 °C. The porous Co<sub>3</sub>O<sub>4</sub> nanorods 10–30 nm in diameter and hundreds of nanometres in length have been fabricated from the above-mentioned multicomponent nanowires by calcination at 400 °C. The morphology and structure of cobalt nitrate carbonate hydroxide hydrate nanowires and Co<sub>3</sub>O<sub>4</sub> nanorods have been characterized by transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM) and x-ray powder diffraction (XRD). Moreover, the porous Co<sub>3</sub>O<sub>4</sub> nanorods have been applied in the negative electrode materials for lithium ion batteries, which exhibit high electrochemical performance.
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