中文摘要：

应用改进的水热反应法制得粒径小且分布均匀的LiFePO4颗粒，煅烧时加葡萄糖形成包覆碳．XRD、SEM和充放电测试表明，该材料粒径约200am，颗粒的尺寸分布比较均匀，具有3．45V的放电平台，放电容量最高达到140mAh／g，循环到第40周容量仅衰减2．1％．详细讨论了如何有效调控LiFePO4的粒子尺寸以及包覆碳对其电化学性能的影响．

英文摘要：

LiFePO4 was synthesized by means of hydrothermal reaction, in which PVA acts as disperser and glucose as carbon source. The samples were characterized by X-ray diffraction, scanning electron microscopy and electrochemical measurement. SEM results show that the sample is homogeneously composed of grains with a par- ticle size of ca. 200nm. In the charge/discharge test, the products exhibited a 3.45V discharge voltage plateau and a maximum specific capacity of 140mAICg. After 40 cycles, its capacity only declined by 2.1%. Besides these, the mechanism for the influence of the particle size and carbon coating on the electrochemical property of LiFePO4material was discussed in detail.