不同电解质对Mxene掺杂活性炭/钠离子超电容性能的影响

IF 2.6 4区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
ChemNanoMat Pub Date : 2025-05-30 DOI:10.1002/cnma.202500087
Savita S. Mane, Girish M. Joshi
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引用次数: 0

摘要

在此,活性炭/Nafion Mxene复合材料被证明是超级电容器的活性材料;由x射线衍射观察到的结构非晶相变为半晶。傅里叶红外光谱证实了新诱导的O - H (3397 cm−1)和C - H (2123 cm−1)成键。拉曼光谱显示了G和D波段的存在。利用电子显微镜技术对微孔隙度进行了预测。brunauer - emmet - teller分析显示,由于Mxene的加载,表面积减少(1017.5至686.95 m1 g−1)。电化学电导率和电容性能作为水溶液电解质(H2SO4、Na2SO4、KCl-FeCN6和KOH)的函数进行了测试。电化学性能主要取决于电解质介质。理想的H2SO4电解质证实了这一点,并表现出更高的电容和电导率,具有更低的电压降。通过线性拟合(V2/1 vs i/ V1/1)进一步证实了这一点。图中显示了Dunn模型所映射的电容和扩散贡献。Mxene含量为10 wt%的电极在电流密度为0.6 a g−1的H2SO4电解液中表现出429 F g−1的高电容。该电极在500次循环中电容保持率为93%,可用于器件应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of Different Electrolytes on Supercapacitive Performance of Activated Charcoal/Nafion Doped by Mxene Hybrid Electrode

Effect of Different Electrolytes on Supercapacitive Performance of Activated Charcoal/Nafion Doped by Mxene Hybrid Electrode

Effect of Different Electrolytes on Supercapacitive Performance of Activated Charcoal/Nafion Doped by Mxene Hybrid Electrode

Effect of Different Electrolytes on Supercapacitive Performance of Activated Charcoal/Nafion Doped by Mxene Hybrid Electrode

Effect of Different Electrolytes on Supercapacitive Performance of Activated Charcoal/Nafion Doped by Mxene Hybrid Electrode

Herein, activated charcoal/Nafion Mxene composite is demonstrated as an active material for supercapacitors; modified structural amorphous phase to semicrystalline, which is observed by X-ray diffraction. Newly induced OH (3397 cm−1) and CH (2123 cm−1) bonding are confirmed by Fourier transform infrared spectroscopy. Raman spectroscopy reveals presence of G and D bands. Microporosity is forseen by electron microscopy technique. Brunauer–Emmett–Teller analysis discloses a decrease in surface area (1017.5 to 686.95 m1 g−1) due to Mxene loading. Electrochemical conductivity and capacitance performance are tested as a function of aqueous electrolytes (H2SO4, Na2SO4, KCl-FeCN6, and KOH). Electrochemical performance is mainly dependent on the electrolyte medium. The desirable H2SO4 electrolyte confirms it, and exhibits higher capacitance and conductivity, with lower voltage drop. It is further confirmed by linear fitting (V2/1 vs i/ V1/1). It is displayed for capacitance and diffusion contribution mapped by Dunn's model. Electrode with a 10 wt% of Mxene demonstrated the higher capacitance of 429 F g−1 in H2SO4 electrolyte with a current density of 0.6 A g−1. This electrode demonstrated a capacitance retention of 93% over 500 cycles may be enable to deploy for the device application.

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来源期刊
ChemNanoMat
ChemNanoMat Energy-Energy Engineering and Power Technology
CiteScore
6.10
自引率
2.60%
发文量
236
期刊介绍: ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.
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