Muhammad Bilal, Farooq Ahmad, Sidra Zawar, Umer Waqas, Muhammad Ahmed Khan, S. Ramay, S. Atiq
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The electrolyte employed for the electrochemical characterizations was 1 M potassium hydroxide (KOH), carried-out using three-electrode cell. The composite sample Sr2Fe2O5/15% reduced graphene oxide showed excellent electrochemical performance compared to other samples. It demonstrated maximum specific capacitance of ⁓360.29 F g−1 at a lower scan rate of 0.01 V s−1, as observed using cyclic voltammetry. The electrochemical analysis of this electrode through the GCD system has a high value of capacitance ⁓1110 F g−1 followed by a high energy density value of ⁓32.76 Wh/kg, respectively. The Nyquist plot revealed less barrier to charge transfer. Therefore, the comprehensive investigation of this electrode material suggested that this as-synthesized composite could be utilized in high-performance energy storage devices.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimized Charge Dynamics of Sr2Co2O5/rGO Composite Electrodes: Redefining Supercapacitor Efficiency\",\"authors\":\"Muhammad Bilal, Farooq Ahmad, Sidra Zawar, Umer Waqas, Muhammad Ahmed Khan, S. Ramay, S. 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引用次数: 0
摘要
混合过渡金属氧化物因其显著的循环稳定性和更高的电容而成为高效电极材料,并因此显示出卓越的电化学性能。本研究通过溶热技术轻松合成了 Sr2Fe2O5/还原氧化石墨烯复合材料,并对其电化学性能进行了研究。X 射线衍射图样证实了 Sr2Fe2O5 的立方包晶结构。形态分析表明,晶粒清晰,边界锐利,具有均匀分布的多孔区域。通过元素分析确认了样品成分的化学计量比。电化学特性分析采用的电解质是 1 M 氢氧化钾(KOH),使用三电极电池进行。与其他样品相比,Sr2Fe2O5/15% 还原氧化石墨烯复合样品表现出优异的电化学性能。根据循环伏安法的观察,在 0.01 V s-1 的较低扫描速率下,它的最大比电容为 ⁓360.29 F g-1。通过 GCD 系统对该电极进行的电化学分析显示,其电容值⁓1110 F g-1 较高,能量密度值⁓32.76 Wh/kg。奈奎斯特图显示电荷转移障碍较小。因此,对这种电极材料的综合研究表明,这种合成的复合材料可用于高性能储能装置。
Optimized Charge Dynamics of Sr2Co2O5/rGO Composite Electrodes: Redefining Supercapacitor Efficiency
Mixed transition metal oxides have become highly effective electrode materials due to their remarkable cyclic stability and improved capacitance, which has consequently lead them to display exceptional electrochemical performance. In this work, a facile synthesis of Sr2Fe2O5/reduced graphene oxide composites was carried out through solvothermal technique to investigate the electrochemical performance. X-ray diffraction patterns confirmed cubic perovskite structure of Sr2Fe2O5. The morphological analysis revealed well-defined grains with sharp boundaries, having uniformly distributed porous regions. The stoichiometric ratios of sample compositions were confirmed using elemental analysis. The electrolyte employed for the electrochemical characterizations was 1 M potassium hydroxide (KOH), carried-out using three-electrode cell. The composite sample Sr2Fe2O5/15% reduced graphene oxide showed excellent electrochemical performance compared to other samples. It demonstrated maximum specific capacitance of ⁓360.29 F g−1 at a lower scan rate of 0.01 V s−1, as observed using cyclic voltammetry. The electrochemical analysis of this electrode through the GCD system has a high value of capacitance ⁓1110 F g−1 followed by a high energy density value of ⁓32.76 Wh/kg, respectively. The Nyquist plot revealed less barrier to charge transfer. Therefore, the comprehensive investigation of this electrode material suggested that this as-synthesized composite could be utilized in high-performance energy storage devices.