Facile synthesis of a copper oxide/molybdenum disulfide heterostructure for asymmetric supercapacitors of high specific energy

被引:47
作者
Awasthi, Ganesh Prasad [1 ]
Poudel, Milan Babu [1 ]
Shin, Miyeon [2 ]
Sharma, Krishna Prasad [2 ]
Kim, Han Joo [1 ]
Yu, Changho [1 ,2 ]
机构
[1] Jeonbuk Natl Univ, Div Convergence Technol Engn, Jeonju 54896, Jeollabuk Do, South Korea
[2] Jeonbuk Natl Univ, Dept Energy Storage Convers Engn, Grad Sch FOUR BK21, Jeonju 54896, Jeollabuk Do, South Korea
基金
新加坡国家研究基金会;
关键词
p-n heterostructure; CuO/MoS2; composite; BAC; Asymmetric supercapacitor; Specific energy; ELECTROCHEMICAL SUPERCAPACITORS; HYDROTHERMAL SYNTHESIS; CO3O4; NANOPARTICLES; MOS2; NANOSHEETS; NI-FOAM; PERFORMANCE; HYBRID; CARBON; ELECTRODE; STORAGE;
D O I
10.1016/j.est.2021.103140
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A unique p-n heterostructural CuO/MoS2 composite is synthesized by a facile hydrothermal method. The active edge-sites of two-dimensional MoS2 nanosheets provide ample surface area for firm attachment of urchin-shaped CuO particles without agglomeration during formation of the p-n heterostructure. The composition and morphology of the heterostructure are characterized by field-emission scanning electron microscopy, X-ray diffraction, Fourier - transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The synergism between CuO and MoS2 enhances electrochemical performance by increasing the number of sites available for redox reactions. Electrochemical measurements establish a specific capacitance of 268 F/g and a cyclic stability of 90.02 % in an alkaline electrolyte solution. An asymmetric supercapacitor fabricated with a CuO/MoS2 positive electrode and a biomass-derived activated carbon (BAC) negative electrode (CuO/MoS2//BAC) achieved a specific energy of 26.66 W h/kg at a specific power of 1599.6 W/kg.
引用
收藏
页数:10
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