Journal
RSC ADVANCES
Volume 6, Issue 64, Pages 58916-58924Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra10048a
Keywords
-
Categories
Funding
- Natural Science Foundation of China [21106124, 21375116]
- Postdoctoral Science Foundation of China [2014M551668]
- Testing Center of Yangzhou University
Ask authors/readers for more resources
NiS2-CoS2 composites with different Ni and Co molar ratios for supercapacitors (SCs) were synthesized by one-step hydrothermal co-deposition method using cheap Na2S2O3 center dot 5H(2)O as sulfur source. With the increase of Ni content, the composites particle size increases gradually and the hollow sphere structure becomes more obvious. The electrochemical measurements demonstrate that these composites possess a high specific capacitance (C-m) performance, good rate capability and long cycle stability. To be specific, the Cm of Ni/Co/S-1 composite is the largest, up to 954.3 F g(-1) at 1 A g(-1), and as high as 309.5 F g(-1) even at large current density of 20 A g(-1). Furthermore, the Ni/Co/S-1 maintains 99.9% of its initial Cm after 1000 cycles at 5 A g(-1). Moreover, the asymmetric supercapacitors with Ni/Co/S-1 as positive electrode and active carbon as negative electrode are of prominent energy density of 29.3 W h(-1) kg(-1) at the power density of 0.7 kW kg(-1), and superior cycling stability of 99.1% initial value retention after 1000 cycles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available