Fe_3O_4/C纳米材料的简易制备及其电化学性能  

Facile preparation and electrochemical performance of Fe_3O_4/C nanocomposites

作　　者：金双玲 张睿 邵霞 金鸣林 

机构地区：[1]上海应用技术大学材料科学与工程学院,上海201418

出　　处：《电源技术》2017年第4期537-540,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(U1332107);上海应用技术大学复合材料学科建设资助项目(10210Q140001);上海市一流学科建设资助项目(J201212)

摘　　要：以三氯化铁FeCl_3·6H_2O、尿素CO(NH_2)_2和葡萄糖为原料采用一步水热法制备出前驱体,经过热处理后制备出了Fe_3O_4/C纳米材料。当热处理温度为500℃时前驱体分解为Fe_3O_4/C材料,热处理温度升高到600℃时产物中有FeO和单质Fe出现。所制备的Fe_3O_4/C纳米材料的电化学性能优于商品化纳米Fe_3O_4,600℃下热处理产物循环稳定性最好,在0.2 C的电流密度下循环100次后可逆比容量为648 mAh/g,这可能是由于原位生成的单质铁增加了电极颗粒之间的导电性。Fe30,JC nanocomposites were synthesized by one-pot hydrothermal reaction of ferric chloride, urea and glucose followed by thermal annealing. The precursor is decomposed into Fe30, and carbon at 500 ℃; FeO and Fe are also detected in the product as the annealing temperature increases to 600 ℃. When used as the anode materials for the lithium-ion batteries, the resultant nanocomposites show better electrochemical performance than that of commercial Fe304. The product obtained at 600 ℃. shows the best cycle stability （648 mAh/g at a current density of 0.2 C after 100 cycles）. The excellent electrochemical performance can be attributed to the fact that in-situ generated metallic Fe enhances the electron transfer.

关 键 词：四氧化三铁(Fe3O4) 炭 纳米复合材料 负极材料 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]