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Citation: YOU Chunqin, LUO Min, KAN Xiamei, FU Rongrong, LIANG Bin. One-step Hydrothermal Synthesis of Mesoporous Ruffle-like Sulfide Microspheres for Supercapacitors[J]. Chinese Journal of Applied Chemistry, ;2015, 32(12): 1455-1461. doi: 10.11944/j.issn.1000-0518.2015.12.150181 shu

One-step Hydrothermal Synthesis of Mesoporous Ruffle-like Sulfide Microspheres for Supercapacitors

1.
School of Chemistry and Chemical Engineering, Key Laboratory of Energy Resources and Chemical Engineering, Ningxia University, Yinchuan 750021, China

Corresponding author: LUO Min,
Received Date: 25 May 2015
Available Online: 10 July 2015
Fund Project: 国家自然科学基金资助项目(21361020,21561026) (21361020,21561026)

Mesoporous α-NiS,Co₃S₄ and CoNi₂S₄ electrode materials were synthesized by a simple one-step hydrothermal method,and their electrochemical properties were investigated. X-ray diffraction and electron microscopy results show that as-obtained mesoporous sulfide electrode materials are assembled by single-phase sulfide nanoparticles and the CoNi₂S₄ electrode materials have the unique structure of ruffle-like microspheres consisting of 2D nanoplates. The binary CoNi₂S₄ electrode exhibits much higher specific capacitance of 1678.3 F/g than that of either Co₃S₄(1532.7 F/g) or α-NiS(787.4 F/g) in 6 mol/L KOH at a scan rate of 5 mV/s,and shows excellent capability retention of 45.8% from 5 mV/s to 100 mV/s,which is ~15% higher than that of α-NiS and Co₃S₄. The excellent cycling stability of binary CoNi₂S₄ electrode is achieved with 96.3% of the initial capacitance over 900 consecutive cycles at 15 A/g. Moreover,the columbic efficiency consistently remains above 94.3% within 900 cycles. The fine specific capacitance and good cycling stability demonstrate that the mesoporous CoNi₂S₄ electrode has potential applications in supercapacitors.
- nickel and cobalt metal sulfide,
- supercapacitor,
- rufflelike microsphere,
- hydrothermal,
- mesoporous electrode material
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