Pseudo bismuth vanadate anchored EDLC-MWCNTs: Supercapacitive electrode to a symmetric solid-state device

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Lakshmana Kumar Bommineedi , Tushar B. Deshmukh , Avinash C. Mendhe , Sachin R. Rondiya , Babasaheb R. Sankapal
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引用次数: 0

Abstract

Sponge analogous nano pebbles of bismuth vanadate (BiVO4) decorated over multi-walled carbon nanotubes (MWCNTs) synthesized by the successive ionic layer adsorption and reaction (SILAR) method have been explored towards supercapacitor application through enhanced (8 times) surface roughness (Sa) compared to bare MWCNTs; well supported by wettability studies. Electrochemical studies through CV, GCD, EIS, and electrochemical stability performances of the electrode have been performed in 1 M KCl electrolyte where MWCNTs/BiVO4 showed the highest capacitance (1334.66 F/g) at 3 mV/s with good electrochemical stability of 103 % even after 3500 CV cycles. Interestingly, symmetric solid-state supercapacitor assembled using PVA embedded LiClO4 gel exhibited a remarkable potential window of 1.83 V with corresponding energy and power densities of 18.38 Wh/kg and 2.13 kW/kg, respectively at 1 mA/cm2. The novelty of this work lies in the introduction of a symmetric device using MWCNTs/BiVO4 electrodes for the first time along with its potential for real-world use by illuminating ‘VNIT ‘acronym consisting of 21 red LEDs.

Abstract Image

伪钒酸铋锚定EDLC-MWCNTs:对称固态器件的超级电容电极
通过连续离子层吸附和反应(SILAR)方法合成的多壁碳纳米管(MWCNTs)表面表面粗糙度(Sa)比裸MWCNTs增强(8倍),探索了在多壁碳纳米管(MWCNTs)上装饰类似钒酸铋(BiVO4)海绵纳米鹅卵石的超级电容器应用;润湿性研究很好地支持了这一点。在1 M KCl电解液中,通过CV、GCD、EIS和电化学稳定性性能进行了电化学研究,其中MWCNTs/BiVO4在3 mV/s下表现出最高的电容(1334.66 F/g),即使在3500 CV循环后也保持了103%的良好电化学稳定性。有趣的是,使用PVA嵌入LiClO4凝胶组装的对称固态超级电容器在1 mA/cm2下具有1.83 V的显著电位窗口,相应的能量和功率密度分别为18.38 Wh/kg和2.13 kW/kg。这项工作的新颖之处在于首次引入了使用MWCNTs/BiVO4电极的对称器件,并通过照亮由21个红色led组成的“VNIT”首字母缩写来实现其在现实世界中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Carbon Trends
Carbon Trends Materials Science-Materials Science (miscellaneous)
CiteScore
4.60
自引率
0.00%
发文量
88
审稿时长
77 days
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