三维石墨烯-氧化镍纳米晶复合膜的电容性能  

Capacitance Performance of 3D Graphene/NiO Composite Film

作　　者：郭东杰[1] 位自英 李亚珂[1] 李晓峰[1] 孙淑敏[1] 陈亚清[2] 方少明[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]南京航空航天大学航空宇航学院,江苏南京210016

出　　处：《材料科学与工程学报》2015年第5期657-661,共5页Journal of Materials Science and Engineering

基　　金：长江学者创新团队资助项目(IRT1187);国家自然科学基金资助项目(21371158;21301159);教育部留学归国基金资助项目(1206150079)

摘　　要：本文首先采用高温化学气相沉积技术（CVD）在泡沫镍模板上生长三维石墨烯（3DG）,然后利用化学浴沉积在石墨烯表面沉积碱式镍沉淀,氩气退火后得吸附氧化镍纳米片晶的石墨烯复合膜（3DG/NiO）。X-射线衍射（XRD）、拉曼（Raman）光谱、场发射扫描电子显微镜（FESEM）表征表明：泡沫镍表面生长了致密的三维石墨烯膜,层与层之间呈现明显的堆垛方式;石墨烯膜表面吸附了大量的NiO纳米片状晶体,相邻的纳米晶相互连接形成多孔结构。循环伏安（CV）曲线研究表明：3DG/NiO膜可作为兼具双电层电容和赝电容性能的复合型电极材料。充放电曲线研究表明：3DG/NiO电极的稳定充、放电比电容处于350~400F·g-1之间,300次循环后仅衰减1.12%,库仑效率保持在95%以上。A three-dimensional graphene（3DG）was firstly prepared on a nickel-foam template by using high temperature chemical vapor deposition（CVD）,nickel hydroxide was then fixed onto its surface using chemical bath deposition technique.After annealing in argon gas,3DG attached nickel oxide nano-crystal flake（3DG/NiO）was finally obtained.Investigations were performed using X-ray diffractometry（XRD）,Raman spectroscopy,and field emission scanning electron microscopy（FESEM）.The results show that：foam-nickel surface is coated by a dense 3Dgraphene film with layer-by-layer stacking of monolayers;graphene surface is covered by a large quantity of NiO nano-crystal nano flakes,and adjacent nano-crystal flakes are connected together forming aporous structure.Cyclic voltammograms（CV）curve measurements imply that the 3DG/NiO membrane can be used as a composite electrode containing both electric double layer capacitor and pseudocapacitors.Galvanostatic charge-discharge tests show that the 3DG/NiO electrode possesses stable charge-discharge specific capacitances of 350-400F/g,but the attenuation of specific capacitance is only1.12%,and coulomb efficiencies are more than 95% within 300 cycles.

关 键 词：泡沫镍 石墨烯 氧化镍 超级电容器 恒电流充放电 

分 类 号：TB34[一般工业技术—材料科学与工程]