低温热处理制备石墨烯-氧化钴及其超级电容性能.pdf

第23卷第3期
化
研
中国科技核心期刊
2012年5月
CHEMICAL RESEARCH
hxy@henu.edu.cn
低温热处理制备石瞾烯-氧化钴及其超级电容性能
越晶晶,郑明波2,吕洪岭,李念武1,黄毅,张松涛',曹洁明
(1.南京航空航天大学材料科学与技术学院,江苏南京210016
南京大学电子科学与工程学院-微结构国家重点实验室,江苏南京210093)
摘要:采用简单的水热法制备出功能化石墨烯与 COOOH的复合物,再通过低温热处理得到功能化石墨烯
Co3O复合材料;采用扫描电子显微镜分析了样品的形貌;测定了其电化学性能和氮气吸脱附行为.结果表明,
Co,O)2粒子很好地负载在石墨烯片层之间和表面;形成的复合物具有纳米孔道结构,这些纳米孔道结构有利于
电解液离子的传输;而石墨烯良好的导电性有利于电子传递和提高Co:O)粒子的电容贡献值.与此同时,复合
物在充放电电流密度为1A/g时的电容达320F/g,表现出优异的超电容性能
关键词:功能石墨烯;Co3O;水热法;低温热处理;超级电容性能
中图分类号:O613.71;O614.81
文献标志码:A
文章编号:1008-1011(2012)03-0021-0
Synthesis of functionalized graphene sheet-cobaltosic oxide
nanocomposites by low-temperature heat-treatment and
evaluation of their supercapacitive behavior
ZHAO Jing-jing ZHENG Ming-bo, LV Hong-ling, LI Nian-wu
HUANG Yi, ZHANG Song-tao, CAO Jie-ming
(1. College of Materials Science and Technology, Nanjing Uniersity of Aeronautics andd Astronautics, Nanjing 210016
Jiangsu, China; 2. National Laboratory of Microstructures, School of Electronic Science and Engineering
212ng
Abstract Functionalized graphene sheets(FGS)and COOOH composites were prepared by hy
drothermal method. Resultant FGS-COOOH composites were then heat-treated at lowered tem
perature to produce FGS-COSO, nanocomposites. The morphology of FGS-CO3 O, nanocomp
sites was observed using a scanning electron microscope; and their electrochemical properties as
well as N adsorption-desorption behavior were evaluated. Results indicate that Co3 O, nanopar
ticles are well loaded between graphene sheets and/or on the surface of the graphene sheets
As-prepared FGS-COA O, nanocomposites have nano-scaled channels or pores which are good for
the transmission of electrolyte. The good electrical conductivity of graphene is helpful for en
hancing electron transport and specific capacitance contribution of Co O, nanoparticles. Be
sides, as-prepared FGS-CO, O, nanocomposites have a specific capacitance of about 320 F/g at a
discharging current of 1 A/g, showing excellent supercapacitive behavior
Keywords: FGS; Co O,; hydrothermal method; low-temperature heat-treatment; supercapaci-
tive behavior
收稿日期:2011-10-3
基金项目:江苏省自然科学基金资助项目(BK2010497
作者简介:赵晶晶(1985一),女,硕土生,研究方向为纳米材料.“通讯联系人,E-mail:Mcao@nua.edu.cn.