TiO2/C纳米复合材料的制备及其电化学性能研究  

Synthesis and Electrochemical Performance of TiO_2/C Nanocomposites

作　　者：金双玲[1] 邓洪贵[1] 詹亮[1] 赵跃[1] 乔文明[1] 凌立成[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《无机材料学报》2012年第7期757-763,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(20806024,51002051);国家863重点项目(2008AA062302);中央高校基本科研业务费专项基金(WA1014016)~~

摘　　要：以球状钛乙醇酸盐为TiO2前驱体,葡萄糖作碳源,通过水热法制得φ(300～400)nm的TiO2/C复合纳米微球.葡萄糖的浓度对产物的形貌、结构、碳含量有重要影响,进而影响产物的电化学性能.当碳含量为7wt%时,TiO2/C纳米复合材料的晶粒大小、BET比表面积、平均孔径分别为7.1 nm、157 m2/g和5.2 nm;该材料用作锂离子电池负极材料时,在0.2C的电流密度下循环80次后的嵌锂容量为160 mAh/g,并且具有较好的倍率性能.TiO2/C nanocomposites with diameter of 300 400 nm were synthesized through hydrothermal reaction from titanium glycolate spheres with glucose as carbon precursor.The effects of the glucose concentration on the morphology,structure and carbon coating and electrochemical performance of the product were investigated.When the carbon content of TiO2/C nanocomposite was 7wt%,its average crystallite size,BET surface area and average pore size were 7.1 nm,157 m2/g and 5.2 nm,respectively.When the TiO2/C nanocomposites is used as anode materials for lithium-ion battery,it delivered a capacity of 160 mAh/g after 80 charge/discharge cycles at a current rate of 0.2C with a good rate capability.

关 键 词：二氧化钛 纳米复合材料 负极材料 锂离子电池 电化学 

分 类 号：TM912[电气工程—电力电子与电力传动]