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Electrospun deposited Mn2O3/GO nanofiber composite electrode for hybrid coin cell supercapacitor devices
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2021-09-12 , DOI: 10.1007/s10854-021-06920-4
Aviraj M. Teli 1 , Sagar M. Mane 1 , Jiseong Go 1 , Jae Cheol Shin 1 , Sonali A. Beknalkar 2 , Pramod S. Patil 2 , Vijay C. Karade 3
Affiliation  

In this study, the nanocomposite of manganese oxide (Mn2O3)/graphene oxide (GO) is deposited on a current collector using the single-nozzle electrospinning method. The effects of the GO concentration (volume %) of the Mn2O3 nanofibers (NFs) on the structural, morphological, and electrochemical properties are investigated systematically. The presence of GO in the Mn2O3 NF samples is confirmed using X-ray diffraction patterns, Raman spectroscopy, and X-ray photoelectron spectroscopy, where sp2 hybridization can be observed. The influence of the GO (volume %) in the Mn2O3 NF samples on the contribution of the capacitive and diffusion-controlled process has been calculated mathematically. GO at 5 vol% in the Mn2O3 sample exhibited a high specific capacitance of 588 Fg−1 at a current density of 0.5 mAcm−2 (2.5 Ag−1) in 1 M aqueous electrolyte with 98% cyclic stability up to 1000 cycles. Furthermore, a coin cell hybrid device was assembled using Mn2O3/GO and a Li-chip as an electrode, 1 M LiPF6 as an electrolyte, and a polypropylene sheet as a separator. This device exhibited a capacitance, an energy density, and a power density of 0.33 F (specific capacitance of 740 Fg−1), 925 Whkg−1, and 3.3 kWkg−1, respectively at a current density of 1 mAcm−2 (2.5 Ag−1) along with 90% retention in capacitance measured till 5000 cycles.



中文翻译:

用于混合纽扣电池超级电容器装置的电纺沉积Mn2O3/GO纳米纤维复合电极

在这项研究中,使用单喷嘴静电纺丝方法将氧化锰 (Mn 2 O 3 )/氧化石墨烯 (GO)的纳米复合材料沉积在集电器上。系统地研究了 Mn 2 O 3纳米纤维 (NF)的 GO 浓度(体积 %)对结构、形态和电化学性能的影响。使用 X 射线衍射图、拉曼光谱和 X 射线光电子光谱证实了 Mn 2 O 3 NF 样品中存在 GO ,其中可以观察到sp 2杂化。Mn 2 O 3 中GO(体积%)的影响NF 样本对电容和扩散控制过程的贡献已进行数学计算。Mn 2 O 3样品中 5 vol% 的 GO 在0.5 mAcm -2 (2.5 Ag -1 )的电流密度下在 1 M 水性电解质中表现出 588 Fg -1的高比电容,循环稳定性高达 1000 年的 98%循环。此外,使用Mn 2 O 3 /GO 和锂芯片作为电极、1 M LiPF 6作为电解质和聚丙烯片作为隔板组装纽扣电池混合装置。该器件的电容、能量密度和功率密度为 0.33 F(比电容为 740 Fg -1)、925 Whkg -1和 3.3 kWkg -1,分别在 1 mAcm -2 (2.5 Ag -1 )的电流密度下以及测量到 5000 次循环的 90% 电容保持率。

更新日期:2021-09-12
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