Controlled synthesis of Ni0.25Co0.75(OH)2 nanoplates and their electrochemical propertiesElectronic supplementary information (ESI) available. See DOI: 10.1039/c5ce00310e

• Main Authors: Su, Xinruo, Xu, Yingying, Liu, Jialong, Wang, Rongming
• Format: Article
• Language: English
• ISSN: 1466-8033
• DOI: 10.1039/c5ce00310e

Hexagonal Ni 0.25 Co 0.75 (OH) 2 nanoplates with rough and smooth surfaces have been synthesized with various amounts of CTAB by a mild wet chemical approach. The diameters of these two nanoplates are estimated to be ~150 nm and their thicknesses are ~30 nm. The electrochemical properties of the hexagonal nanoplates have also been investigated by using a three-electrode system under alkaline conditions. The scobinate Ni 0.25 Co 0.75 (OH) 2 nanoplates show enhanced supercapacitor capacity compared with the smooth samples. For scobinate nanoplates, the specific capacitance is 306 F g −1 at a current density of 0.5 A g −1 and remains 90% as the current density increases 16 times. At a current density of 3 A g −1 , the specific capacitance still remains 98% after 7000 cycles. The scobinate Ni 0.25 Co 0.75 (OH) 2 nanoplates show excellent electrochemical performance much better than that of smooth nanoplates. The specific capacitance of the material is 306 F g −1 . At a current density of 3 A g −1 , the specific capacitance still remains at 98% after 7000 cycles.