Generic Synthesis of Carbon Nanotube Branches on Metal Oxide Arrays Exhibiting Stable High‐Rate and Long‐Cycle Sodium‐Ion Storage. Issue 22 (29th April 2016)

• Record Type: Journal Article
• Authors: Xia, Xinhui; Chao, Dongliang; Zhang, Yongqi; Zhan, Jiye; Zhong, Yu; Wang, Xiuli; Wang, Yadong; Shen, Ze Xiang; Tu, Jiangping; Fan, Hong Jin
• Is Part Of: Small. Volume 12:Issue 22(2016)
• Page Start: 3048
• Page End: 3058
• Publication Date: 2016-04-29
• Subjects: carbon nanotubes -- core/branch -- metal oxides -- nanowire arrays -- pseudocapacitive -- sodium ion storage; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201600633
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : A new and generic strategy to construct interwoven carbon nanotube (CNT) branches on various metal oxide nanostructure arrays (exemplified by V2 O3 nanoflakes, Co3 O4 nanowires, Co3 O4 –CoTiO3 composite nanotubes, and ZnO microrods), in order to enhance their electrochemical performance, is demonstrated for the first time. In the second part, the V2 O3 /CNTs core/branch composite arrays as the host for Na + storage are investigated in detail. This V2 O3 /CNTs hybrid electrode achieves a reversible charge storage capacity of 612 mAh g −1 at 0.1 A g −1 and outstanding high‐rate cycling stability (a capacity retention of 100% after 6000 cycles at 2 A g −1, and 70% after 10 000 cycles at 10 A g −1 ). Kinetics analysis reveals that the Na + storage is a pseudocapacitive dominating process and the CNTs improve the levels of pseudocapacitive energy by providing a conductive network. Abstract : Chemical vapor deposition synthesis of carbon nanotube (CNT) branches is demonstrated on four types of metal oxide arrays. High‐performance Na ion storage is proven in the V2 O3 /CNTs system long cycle stability and high rates.