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Mesoporous nano-Co3O4: A potential negative electrode material for alkaline secondary battery |
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| Authors: | Li LiYaping Wang Yijing Wang Yan HanFangyuan Qiu Guang LiuChao Yan Dawei SongLifang Jiao Huatang Yuan |
| Affiliation: | a Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University, Tianjin 300071, PR China b Center of Photonics Fabrication, Jiangsu University, Zhenjiang 212013, PR China c School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, PR China |
| Abstract: | A potential negative electrode material (mesoporous nano-Co3O4) is synthesized via a simple thermal decomposition of precursor Co(OH)2 hexagonal nanosheets in the air. The structure and morphology of the samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It is found that the nano-Co3O4 is present in mesoporous hexagonal nanoparticles. The average size of holes is about 5-15 nm. The electrochemical performances of mesoporous nano-Co3O4 as the active starting negative electrode material for alkaline secondary battery are investigated by galvanostatic charge-discharge and cyclic voltammetry (CV) technique. The results demonstrate that the prepared mesoporous nano-Co3O4 electrode displays excellent electrochemical performance. The discharge capacity of the mesoporous nano-Co3O4 electrode can reach 436.5 mAh g−1 and retain about 351.5 mAh g−1 after 100 cycles at discharge current of 100 mA g−1. A properly electrochemical reaction mechanism of mesoporous nano-Co3O4 electrode is also constructed in detail. |
| Keywords: | Mesoporous Nano-Co3O4 Active starting material Electrochemical performance Alkaline secondary battery |
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