Seed-assisted smart construction of high mass loading Ni–Co–Mn hydroxide nanoflakes for supercapacitor applications. Issue 32 (27th July 2017)

• Record Type: Journal Article
• Authors: Yang, Shaoran; Wu, Chun; Cai, Junjie; Zhu, Ying; Zhang, Hongti; Lu, Yang; Zhang, Kaili
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 32(2017)
• Page Start: 16776
• Page End: 16785
• Publication Date: 2017-07-27
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta03932h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Mesoporous Ni–Co–Mn hydroxide nanoflakes (NCMH) with excellent supercapacitive performance have been firstly prepared by facile and cost effective seed-assisted methods. Abstract : Smartly designed nanoarchitectures with effective hybridization of transition metal oxides/hydroxides are promising to realize high performance electrodes for energy storage devices. To promote the applications of high-power supercapacitors, a seed-assisted method is firstly applied to prepare mesoporous Ni–Co–Mn hydroxide nanoflakes (NCMH) on nickel foam with practical mass loadings (higher than 5 mg cm −2 ). Further mechanism study reveals that the Ni(OH)2 nanorod arrays, which are firstly prepared by a hydrothermal process, serve as seeds for the successful deposition of NCMH nanoflakes. Through this convenient and cost effective method, this design results in a more orderly spatial distribution, lower intrinsic resistance and shorter electron transport pathways. The proof-of-concept application of NCMH as a binder-free supercapacitor electrode reveals an impressive specific capacity of 1043.1 μA h cm −2 at a high mass loading of 5.2 mg cm −2 . The NCMH//activated carbon asymmetric device delivered a maximum energy density of 55.42 W h kg −1 at a power density of 750 W kg −1, exhibiting great potential as an energy storage device and shedding light on the structural design of nanomaterials.