【摘要】 以Li2CO3和TiO2为原料,采用固相法合成尖晶石结构Li4Ti5O12.用XRD、SEM对合成的Li4Ti5O12进行了表征.用恒流电池测试仪,对Li4Ti5O12的循环性能进行了测试分析.结果表明:以Li2CO3为原料过量质量分数3%,800℃恒温16 h合成的Li4Ti5O12,在电流密度0.13 mA/cm2时,首次充电容量达到166 mAh/g,20次循环后容量保持在164 mAh/g,容量保持率为98.8%.更多还原

【Abstract】 Spinel Li4Ti5O12 were synthesized by solid-state method with Li2CO3 and TiO2 as reactants.The morphology and microstructure of the samples were characterized by X-ray diffraction analysis,scanning electron microscopy,respectively.The relative capacity and the cycle characteristics of the Li4Ti5O12 had been tested with a charge/discharge apparatus.It was shown that the first charge capacity of Li4Ti5O12 was increased with the additional 3% of Li2CO3,and it was 166 mAh/g with a current density 0.13 mA/cm2 when the mixture were hold at 800 ℃ for 16 h.After 20 cycles it was still 164 mAh/g.A relative capacity of 98.8% was obtainable.更多还原