Crystalline CoB: Solid state reaction synthesis and electrochemical properties |
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| Authors: | Yaping WangLi Li Yijing Wang Dawei SongGuang Liu Yan HanLifang Jiao Huatang Yuan |
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| Affiliation: | a Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University, Tianjin 300071, PR China
b School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, PR China |
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| Abstract: | Using a facile and effective method based on the solid phase reaction between Co(OH)2 and KBH4, we successfully synthesize orthorhombic CoB. It is shown that this CoB obtained is of high purity and thermal stability. A possible formation process for orthorhombic CoB is discussed in detail. In addition, crystalline CoB shows excellent electrochemical reversibility and considerable high charge-discharge capacities when it is used as the anode material for nickel-based secondary batteries. The reversible discharge capacities of the CoB electrode are found to be about 380 mAh g−1 at a discharge current of 25 mA g−1 and 360 mAh g−1 at 100 mA g−1. Moreover, electrochemical reaction mechanism of CoB is investigated in detail. |
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| Keywords: | Nickel-based secondary battery Cobalt boride Solid state reaction Electrochemistry Reaction mechanism |
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