Vandana Molahalli, Gowri Soman, Vinay S. Bhat, Apoorva Shetty, Abdullah Alodhayb and Gurumurthy Hegde
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Electrochemical properties of the prepared material nanocomposite were analyzed by applying cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. An asymmetric supercapacitor (ASC) was constructed using ZS/GP nanocomposite as the positive electrode and <em>Caesalpinia</em> pod-based carbonaceous material as the negative electrode material, and its performance was investigated. As a result, the fabricated ASCs were found to have an excellent specific capacitance of 165.88 F g<small><sup>−1</sup></small> at 1.4 V, with an energy density of 5.12 W h kg<small><sup>−1</sup></small> and a power density of 2672 W kg<small><sup>−1</sup></small>. The prepared nanocomposite material for the ASC showed a cycle stability of 17k cycles at a current density of 5 A g<small><sup>−1</sup></small>. This study revealed that the electrode material ZS/GP nanocomposite is highly suitable for supercapacitor applications. The ASC device's extended cycle life experiments for 17k cycles produced a coulombic efficiency of 97% and a capacitance retention of 73%, demonstrating the promising potential of the electrode materials for greener as well as efficient energy storage applications while converting abundant bio waste into effective energy.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra05340k?page=search","citationCount":"0","resultStr":"{\"title\":\"Zinc oxide/tin oxide nanoflower-based asymmetric supercapacitors for enhanced energy storage devices\",\"authors\":\"Vandana Molahalli, Gowri Soman, Vinay S. 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引用次数: 0
摘要
储能设备研究的重点是利用两种不同的电极材料改进不对称超级电容器(ASC)。在这项工作中,我们通过水热法成功制备了一种独特的材料--ZnO/SnO2 纳米花。氧化石墨烯(GO)是通过改良的 Hummers 技术合成的。ZnO/SnO2 纳米花通过两个步骤沉积在聚吡咯(PPY)纳米管/氧化石墨烯复合材料(ZS/GP)上:原位化学聚合,然后是水热法。应用循环伏安法(CV)、电静态充放电法(GCD)和电化学阻抗光谱法(EIS)分析了所制备材料纳米复合材料的电化学特性。以 ZS/GP 纳米复合材料为正极,以 Caesalpinia 豆荚基碳质材料为负极,构建了非对称超级电容器(ASC),并对其性能进行了研究。结果发现,所制备的 ASCs 在 1.4 V 下具有 165.88 F g-1 的优异比电容,能量密度为 5.12 W h kg-1,功率密度为 2672 W kg-1。所制备的 ASC 纳米复合材料在 5 A g-1 的电流密度下显示出 17k 周期的循环稳定性。这项研究表明,ZS/GP 纳米复合电极材料非常适合超级电容器应用。ASC 装置的循环寿命实验延长了 17k 周期,库仑效率达到 97%,电容保持率达到 73%,这表明电极材料在将丰富的生物废物转化为有效能源的同时,还具有绿色高效储能应用的巨大潜力。
Zinc oxide/tin oxide nanoflower-based asymmetric supercapacitors for enhanced energy storage devices
Research on energy storage devices has focused on improving asymmetric supercapacitors (ASCs) by utilizing two different electrode materials. In this work, we have successfully prepared a unique material, ZnO/SnO2 nanoflower, via the hydrothermal method. Graphene oxide (GO) was synthesized by applying the modified Hummers' technique. The ZnO/SnO2 nanoflower was deposited on a polypyrrole (PPY) nanotube/graphene oxide composite (ZS/GP) in two steps: in situ chemical polymerization, followed by a hydrothermal method. Electrochemical properties of the prepared material nanocomposite were analyzed by applying cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. An asymmetric supercapacitor (ASC) was constructed using ZS/GP nanocomposite as the positive electrode and Caesalpinia pod-based carbonaceous material as the negative electrode material, and its performance was investigated. As a result, the fabricated ASCs were found to have an excellent specific capacitance of 165.88 F g−1 at 1.4 V, with an energy density of 5.12 W h kg−1 and a power density of 2672 W kg−1. The prepared nanocomposite material for the ASC showed a cycle stability of 17k cycles at a current density of 5 A g−1. This study revealed that the electrode material ZS/GP nanocomposite is highly suitable for supercapacitor applications. The ASC device's extended cycle life experiments for 17k cycles produced a coulombic efficiency of 97% and a capacitance retention of 73%, demonstrating the promising potential of the electrode materials for greener as well as efficient energy storage applications while converting abundant bio waste into effective energy.
期刊介绍:
An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.