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 el...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.展开更多
基金Project(2007BAE12B01) supported by the National Key Technology R&D Program of China
文摘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.
