High performance supercapacitors using metal oxide anchored graphene nanosheet electrodes
High performance supercapacitors using metal oxide anchored graphene nanosheet electrodes
复制标题
DOI：
10.1039/c1jm12963e
复制
发表时间：
2011-01-01
影响因子：
--
通讯作者：
Alshareef, H. N.
中科院分区：
文献类型：
--
作者：
Rakhi, R. B.;Chen, Wei;Alshareef, H. N.
将金属氧化物纳米粒子化学固定在石墨烯纳米片(GNS)上，成功地将SnO(2)/GNS、MnO(2)/GNS和RuO(2)/GNS(占GNS负载量的58%)复合材料涂覆在导电碳纤维基片上作为超级电容器电极。结果表明，金属氧化物纳米颗粒的加入改善了GNS的电容性能，这是由于间隔基和氧化还原反应的共同作用。在本研究中，SnO(2)/GNS(195Fg(-1))和RuO(2)/GNS(365Fg(-1))复合材料在20 mV S(-1)的扫描速度下获得的比电容(相对于复合材料质量)是迄今报道的最好的双电极配置。SnO(2)/GNS、MnO(2)/GNS和RuO(2)/GNS的最大能量(27.6、33.1和50.6W·h kg(-1))和功率密度(15.9、20.4和31.2kW·kg(-1))也表现出较高的值。这些发现表明了金属氧化物/GNS基复合涂层碳纤维在开发高性能储能系统中的重要性和巨大潜力。
Metal oxide nanoparticles were chemically anchored onto graphene nanosheets (GNs) and the resultant composites-SnO(2)/GNs, MnO(2)/GNs and RuO(2)/GNs (58% of GNs loading)-coated over conductive carbon fabric substrates were successfully used as supercapacitor electrodes. The results showed that the incorporation of metal oxide nanoparticles improved the capacitive performance of GNs due to a combination of the effect of spacers and redox reactions. The specific capacitance values (with respect to the composite mass) obtained for SnO(2)/GNs (195 F g(-1)) and RuO(2)/GNs (365 F g(-1)) composites at a scan rate of 20 mV s(-1) in the present study are the best ones reported to date for a two electrode configuration. The resultant supercapacitors also exhibited high values for maximum energy (27.6, 33.1 and 50.6 W h kg(-1)) and power densities (15.9, 20.4 and 31.2 kW kg(-1)) for SnO(2)/GNs, MnO(2)/GNs and RuO(2)/GNs respectively. These findings demonstrate the importance and great potential of metal oxide/GNs based composite coated carbon fabric in the development of high-performance energy-storage systems.