Synchronous exfoliation and assembly of graphene on 3D Ni(OH)2 for supercapacitorsElectronic supplementary information (ESI) available. See DOI: 10.1039/c6cc07645a

• Main Authors: Ma, Liguo, Zheng, Maojun, Liu, Shaohua, Li, Qiang, You, Yuxiu, Wang, Faze, Ma, Li, Shen, Wenzhong
• Format: Journal Article
• Language: English
• Published: 08.11.2016
• ISSN: 1359-7345; 1364-548X
• DOI: 10.1039/c6cc07645a

Nowadays, new approaches to fabricate high-performance electrode materials are of vital importance in the renewable energy field. Here, we present a facile synthesis procedure of 3D Ni(OH) 2 /graphene hybrids for supercapacitors via synchronous electrochemical-assisted exfoliation and assembly of graphene on 3D Ni(OH) 2 networks. With the assistance of an electric field, the electrochemically exfoliated high-quality graphene can be readily, uniformly assembled on the surfaces of 3D Ni(OH) 2 . When serving as electrode materials for supercapacitors, the resulting 3D Ni(OH) 2 /graphene composites exhibited excellent specific capacitance (263 mF cm −2 at 2 mA cm −2 ), remarkable rate capability and super-long cycle life (retention of 94.1% even after 10 000 continuous charge-discharge cycles), which may be attributed to their highly porous, stable 3D architecture as well as uniform, firm anchoring of ultrathin graphene on their surfaces. Therefore, our approach provides a facile strategy for the large-scale synthesis of high-quality graphene based composites towards various applications. We present a facile strategy to synchronously exfoliate graphite and assemble high-quality graphene on 3D Ni(OH) 2 surfaces. When serving as electrode materials for supercapacitors, the resulting 3D Ni(OH) 2 /graphene composites exhibited excellent specific capacitance, remarkable rate capability and super-long cycle life.