Synthesis and electrochemical performance of TiO2-B as anode material |
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Authors: | WANG Xin-yu XIE Ke-yu LI Jie LAI Yan-qing ZHANG Zhi-an LIU Ye-xiang |
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Affiliation: | (1) Battery Research Center, KIST, Seoul, 130-650, Korea |
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Abstract: | TiO2-B was synthesized by solid-state reaction. The structures, surface morphologies and electrochemical performances of TiO2-B were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and electrochemical measurement, respectively.
The effects of calcining temperature, molar ratio of K2O to TiO2 and calcining time on the characteristics of TiO2-B were investigated. The results show that the calcining time exerts a significant influence on the electrochemical performances
of TiO2-B. The TiO2-B is obtained with good crystal structure and suitable size by using K2Ti4O9, which is prepared at 950°C for 24 h under the condition of x(K2O)/x(TiO2)=1:3.5. The TiO2-B delivers all initial discharge capacity of 231.6 mA·h/g. And the rate capacity is 73.2 mA·h/g at 1 675 mA/g, which suggests
that TiO2-B is a promising anode material for the lithium ion batteries. |
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Keywords: | lithium ion battery TiO2-B solid state method anode material |
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