电源技术2017，Vol.41Issue(4)：533-536,4.
沥青包覆Si/G/C复合材料的制备与性能研究
Study on preparation and property of pitch-coated silicon/graphite/carbon composite
摘要
Abstract
Using pitch as carbon source,a series of silicon/graphite/amorphous carbon composites in a core-shell structure were prepared by spray drying with subsequent pyrolysis process.The effects of pyrolytic temperature of pitch on the structure,morphology and electrochemical performance of the composite were studied by XRD,SEM,TEM and galvanostatic charge-discharge test.The results demonstrate that the precursor is decomposed at different temperatures of 900,1 000,1 050,1 100,1 150,1 200 ℃.The comprehensive electrochemical properties of silicon/graphite/amorphous carbon composite decomposed at 1 050 ℃ are better than others.Its initial discharge specific capacity is 714.9 mAh/g while the initial coulombic efficiency is 84.0％ at a constant current density of 100 mA/g.After 30 cycles,its capacity retention reaches 84.9％.关键词
锂离子电池/喷雾干燥/硅碳负极/负极材料/硅/碳复合材料Key words
lithium-ion battery/spray drying/Si/C anode/anode material/silicon/carbon composite分类
信息技术与安全科学引用本文复制引用
阮威,王英,唐仁衡,肖方明,孙泰..沥青包覆Si/G/C复合材料的制备与性能研究[J].电源技术,2017,41(4):533-536,4.基金项目
广东省自然科学基金(2014A030308015) （2014A030308015）
广东省省级科技计划项目(2015B010116002) （2015B010116002）
广东省第二批省战略性新兴产业发展专项资金新能源汽车项目(粤发改高技术[2011]1579号) （粤发改高技术[2011]1579号）
