Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 45, Pages 26131-26138Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta09692b
Keywords
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Funding
- Innovation Entrepreneurship Program of Jiangsu Province [Suren caiban [2016] 32]
- National Natural Science Foundation of China [21878129]
- Industry Prospect and Key Core Technology (Competition Project) of Jiangsu Province [BE2019093]
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It is an effective strategy to prepare polymetallic multi-dimensional hierarchical nanoarrays to enhance the electrochemical capacity and energy density of supercapacitors. Herein, 3D hierarchical nanoarrays consisting of NiCoZn-S nanosheets coupled with granular NiCo2S4 nanowires were fabricated on carbon fibers (CF@NiCoZn-S/NiCo2S4). First, using 2D Zn-MOF as a precursor, 3D architecture carbonate hydroxide nanoarrays (CF@NiCoZn-CH/NiCo-CH) were synthesized via a one-step hydrothermal approach in situ. Then, the hierarchical CF@NiCoZn-S/NiCo2S4 was fabricated via a simple hydrothermal reaction in a sodium sulfide aqueous solution, and it showed an outstanding capacity of 194 mA h g(-1) at 1 A g(-1). Significantly, the hybrid supercapacitors (HSCs) assembled with CF@NiCoZn-S/NiCo2S4 as the cathode and carbon nanosheets inserted with single-walled carbon nanotubes (CNS-CNTs) as the anode delivered an utmost energy density of 48.7 W h kg(-1) at a power density of 800 W kg(-1). In addition, this HSC device achieved a capacity retention of 70.1% after 10000 charge-discharge cycles. Such excellent energy storage characteristics are entirely attributed to the unique structure of the cathode that includes 1D NiCo2S4 nanowires with a fast ion/electron transport, 2D NiCoZn-S nanosheets with enhanced structural stability and 3D carbon fiber cloths with excellent mechanical flexibility. Therefore, these 3D architecture electrodes may possess a great potential in energy storage, electrocatalysis or environmental applications.
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