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1. Sulfur doped cobalt hydroxide electrode for high-performance supercapacitors | |||
ZHAO Li,HU Xinju,XIANG Bin | |||
Chemical Engineering 02 April 2023 | |||
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Abstract:Sulfur-doped Co(OH)2 layered nano-sheet electrode materials were prepared by a simple one-step electrodeposition method using three substances, namely thiourea (TU), thioacetamide (TAA), and N-methylthiourea (N-MTU), as sulfur sources. The morphology, crystallinity, and electronic structure of Co(OH)2 materials changed with different sulfur source doping. Three-electrode electrochemical testing in 2 M KOH showed that the electrochemical performance of the materials improved significantly after being doped with the three kinds of sulfur sources. Among them, the material doped with TU as the sulfur source exhibited the highest specific capacitance (1687.27 F g-1 at 1 A g-1), while the materials doped with TAA and N-MTU as the sulfur sources had specific capacitances of 1478.18 F g-1 and 1007.27 F g-1, respectively. Compared with pure Co(OH)2 (678.18 F g-1 at 1 A g-1), the specific capacitance was significantly improved. The S-Co(OH)2 sample doped with TU was used as the positive electrode and FeOOH@rGO was used as the negative electrode to form an STU-Co(OH)2//FeOOH@rGO ASC, which achieved a high energy density of 61.1 Wh kg-1 at a power density of 800 W kg-1 and still maintained an 83% capacity retention rate after 5000 cycles, demonstrating good practical application ability. | |||
TO cite this article:ZHAO Li,HU Xinju,XIANG Bin. Sulfur doped cobalt hydroxide electrode for high-performance supercapacitors[OL].[ 2 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760160 |
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