Hierarchically tubular architectures composed of vertical carbon nanosheets embedded with oxygen-vacancy enriched hollow Co3O4 nanoparticles for improved energy storage. (1st October 2020)

• Record Type: Journal Article
• Authors: Gong, Yujiao; An, Jianing; Dai, Henghan; Chen, Ruyi; Yu, Chenyang; Chen, Qiang; Zhou, Jinyuan; Sun, Gengzhi; Huang, Wei
• Is Part Of: Electrochimica acta. Volume 356(2020)
• Publication Date: 2020-10-01
• Subjects: Metal-organic frameworks -- Hierarchical carbon -- Tubular architectures -- Hollow transition metal oxides -- Energy storage devices; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.136843
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Although great efforts have been devoted to exploiting electrode materials with designed composition and nanostructure for high-performance electrochemical energy storage devices, it remains critically challenging to achieve hierarchically tubular architectures constructed with different low-dimensional building blocks due to the lack of appropriate synthetic strategies. Herein, hierarchically tubular structures composed of vertically aligned carbon nanosheets embedded with oxygen-vacancy enriched hollow Co3 O4 nanoparticles (H-Co3 O4 /C) are prepared. Benefited from these unique features, H-Co3 O4 /C electrode containing 54 wt.% carbon and 46 wt.% Co3 O4 exhibits high specific capacity of 328.0 C g −1 at 1 A g −1, good rate capability with 70% capacity retained at 20 A g −1, improved energy density of 8.3 Wh kg −1 at the power density of 4268.5 W kg −1 as well as remarkable stability for 10, 000 charge-discharge cycles.