摘要
采用液相沉淀法制备Co3O4纳米颗粒,不同比例的Co3O4与氧化石墨烯(GO)进行机械研磨得到Co3O4/GO复合材料。采用包括拉曼光谱在内的多种表征手段对Co3O4和Co3O4/GO复合材料进行了表征,结果表明,Co3O4为尖晶石相,Co3O4/GO复合材料中Co3O4均匀分布在GO片层之中。以Co3O4/GO复合材料为超级电容器电极材料,电化学性能测试结果表明,Co3O4在电流密度为1A/g时,比电容为160F/g。复合材料中Co3O4与GO比例为1.5∶1时的电化学性能最佳,在电流密度为1A/g时,比电容达到615F/g,相比纯Co3O4提升3.8倍;在电流密度为5A/g时,比电容仍能保持78%;在电流密度为7A/g时,经过1000次循环,比电容仍能保持76%。
Co3O4 nanoparticles were prepared by a liquid phase precipitation method, and then Co3O4/graphene oxide(GO) composites with different Co3O4 contents were prepared by a mechanical lapping. Co3O4 and Co3O4/GO composites were characterized using Raman spectroscopy and more. The experimental results indicate that Co3O4 is spinel phase with high crystallinity and purity. Co3O4/GO composites still keeps the layered structure of graphene oxide. Co3O4 was evenly distributed in graphene oxide layer. The electrochemical test results show that Co3O4/GO composite with a ratio of Co3O4 to GO in 1.5∶1 has the best electrochemical performance. The specific capacitance of Co3O4 is 160 F/g, while that of Co3O4/GO composite is 615 F/g under the current density of 1 A/g, 3,8 times increasing. The specific capacitance remained 78% under the current density of 5 A/g. The specific capacitance remained 76% after 1000 loops under the current density of 7 A/g.
作者
杨依训
肖雪春
王毓德
YANG Yixun;XIAO Xuechun;WANG Yude(School of Materials Science and Engineering,Yunnan University,Kunming 650091,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2019年第5期794-800,共7页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(61761047,41876055)
作者简介
杨依训,男,硕士研究生,主要从事纳米功能材料及其电化学性能研究;通讯作者:王毓德,男,教授,E-mail:ydwang@ynu.edu.cn。
