新型炭材料2011，Vol.26Issue(6)：446-452,7.
硅/天然石墨/沥青炭复合材料的合成及其电化学性能
Synthesis and electrochemical performance of Si/natural graphite/pitch carbon composites as the anode of a lithium ion battery
摘要
Abstract
Composites with a pitch-based carbon (PC) matrix and a mixture of nanoparticle silicon and natural flake graphite (NG) as filler (Si-NG/PC) was prepared by high energy mechanical milling of mixtures of nano-Si, NG and high softening point pitch, followed by pyrolysis at 1000t for 2h to convert the pitch into carbon. The influence of the preparation conditions on the electrochemical properties of the composites for use as the anode of a lithium ion battery was investigated. This included milling time, rotation speed and the precursor formulations. XRD and SEM were used to examine the composition and structure of the composites. Results indicated that the optimum milling time is 21 h at a rotation speed of 300r/min, and the optimum proportions of nano-Si and pitch carbon in the composites were less than 35 wt. % and around 30 wt. % , respectively. Under the optimized conditions, the Si-NG/PC composite presented a high specific capacity and a good cycling stability when tested for 50 cycles.关键词
硅/天然石墨/沥青炭复合材料/优化合成/阳极/锂离子电池/电化学性能Key words
Silicon/nature graphite/pitch-carbon composites/Optimum synthesis/Anode/Lithium-ion battery/Electrochemical performance分类
通用工业技术引用本文复制引用
李明齐,向卫民,任兆刚,王静..硅/天然石墨/沥青炭复合材料的合成及其电化学性能[J].新型炭材料,2011,26(6):446-452,7.基金项目
四川省教育厅项目(09ZB090),西华师范大学博士启动项目(09B005). （09ZB090）
