期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 824, 期 -, 页码 226-237出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2018.07.046
关键词
Pseudocapacitor; Mesoporous; MnO2; MoS2; Nanocomposite
资金
- MHRD (Govt. of India)
- CSIR, New Delhi, India [22(658)/14/EMR-II]
Herein, we are reporting the synthesis of flower - like MoS2, spherical MnO2 and their nanocomposites using versatile hydrothermal approach. The structural and morphological studies of the synthesized samples have been performed using X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Field emission scanning electron microscopy (FESEM). Thermal gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) have also been carried out to evaluate the thermal stability, elemental composition and functional groups present in the samples, respectively. Surface area and pore size distribution are determined by the Brunauer-Emmett-Teller (BET) analysis. The effect of molar ratio of MnO2 and MoS2 on the electrochemical properties of MnO2@MoS2 nanocomposite has been investigated thoroughly using conventional three electrodes set-up in 2 M KOH aqueous electrolyte at room temperature. From the experimental results, the synthesized nanocomposite with 3:1 molar ratio of MnO2 and MoS(2 )exhibits higher BET specific surface area (similar to 133 m(2)/g), optimum pore size distribution, specific capacitance of 352 F g(-1) at 1 A g(-1), similar to 72% capacity retention and similar to 88% coulombic efficiency after 2000 successive cycles at 3 A g(-1) in 2 M KOH. This sample exhibits smaller relaxation time constant (tau(o) = 150 ms) and higher diffusion coefficient (D-a = 162.99 x 10(-10) cm(2) s(-1)). The detail correlation between electrochemical behavior and structural characterization of as synthesized nanocomposites has been described and discussed in this paper.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据