A relatively simple galvanostatic method was used for the evaluation on the average chemical diffusion coefficient of lithium-ion in spinel Li4Ti5O12 prepared by solid-state reaction technique. The diffusion coefficie...A relatively simple galvanostatic method was used for the evaluation on the average chemical diffusion coefficient of lithium-ion in spinel Li4Ti5O12 prepared by solid-state reaction technique. The diffusion coefficient of lithium-ion was estimated to be 2.8×10-13 cm2·s-1 and 1.3×10-13 cm2·s-1 for charge and discharge,respectively.展开更多
以TiO2和醋酸锂为原料,采用在乙醇中预分散和在液相体系中熔融浸渍的协同共混技术,实现反应物料间微尺度混合,在较低温度下分段煅烧合成纳米结构钛酸锂.X射线衍射(X-ray diffraction,XRD)、扫描电子显微镜(scanning electron microscope...以TiO2和醋酸锂为原料,采用在乙醇中预分散和在液相体系中熔融浸渍的协同共混技术,实现反应物料间微尺度混合,在较低温度下分段煅烧合成纳米结构钛酸锂.X射线衍射(X-ray diffraction,XRD)、扫描电子显微镜(scanning electron microscope,SEM)和粒度分布等测试结果表明,产物为尖晶石结构钛酸锂(Li4Ti5O12),平均粒径约为550 nm.以该产物为负极材料组装锂离子电池并测试其电化学性能,结果表明其性能良好,0.1 C倍率下首次充放电比容量高达165 mA.h/g,具有稳定的电压平台,循环性能良好.展开更多
文摘A relatively simple galvanostatic method was used for the evaluation on the average chemical diffusion coefficient of lithium-ion in spinel Li4Ti5O12 prepared by solid-state reaction technique. The diffusion coefficient of lithium-ion was estimated to be 2.8×10-13 cm2·s-1 and 1.3×10-13 cm2·s-1 for charge and discharge,respectively.
