碳纳米管/中间相炭微球复合材料锂离子电池负极材料研究  

Electrochemical properties of lithium ion batteries with CNTs /MCMB composites as anode material

作　　者：赵廷凯[1] 张红燕[1] 朱若星 王军高 折胜飞 赵星[1] 李铁虎[1] 

机构地区：[1]西北工业大学材料科学与工程学院,西安710072

出　　处：《功能材料》2014年第19期19080-19083,共4页Journal of Functional Materials

基　　金：教育部博士学科点专项科研基金资助项目(20096102120016;20116102110014);国家自然科学基金资助项目(51172184)上;中国航天科技创新基金资助项目(CASC200906);中国航天科技支撑基金资助项目(CASC201209)上;陕西省科技攻关资助项目(2013K09-03);西北工业大学研究生创业种子基金资助项目(Z2014093)

摘　　要：采用热缩聚法(温度为420℃、反应时间为2 h)制备出碳纳米管/中间相炭微球复合材料。研究了碳纳米管添加量对中间相炭微球的形成和形貌的影响,以及对碳纳米管/中间相炭微球复合材料充放电性能的影响。实验结果表明,5%(质量分数)的碳纳米管添加量有利于中间相炭微球的形成,碳纳米管/中间相炭微球复合材料作为负极材料的锂离子电池充放电容量可达到337 mAh/g,20次循环后容量仍保持88%。Carbon nanotubes (CNTs)/mesocarbon microbeads (MCMB)composites were prepared by thermal polymerization at 420 ℃ for 2 h.The effect of CNTs adding amount on the synthesis of CNTs/MCMB compos-ites was studied by polarized microscope and scanning electron microscope.The charge-discharge performances of CR2035 lithium ion batteries using CNTs/MCMB composites as anode material were tested.The results showed that CNTs was beneficial to promote the formation of MCMB,while the charge-discharge performance of batteries with CNTs was better than that of without CNTs.The optimum conditions were determined with the charge-discharge performance test:The CNTs/MCMB composites added 5wt% CNTs was the most promis-ing anode material for lithium ion batteries.

关 键 词：碳纳米管 中间相炭微球 锂离子电池 电化学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]