Journal of Taibah University for Science ( IF 3.3 ) Pub Date : 2020-12-31 , DOI: 10.1080/16583655.2020.1867338 Muhammad Naeem Ashiq 1 , Ali Aman 1 , Thamraa Alshahrani 2 , Muhammad Faisal Iqbal 3 , Aamir Razzaq 4 , Muhammad Najam-Ul-Haq 1 , Afzal Shah 5 , Jan Nisar 6 , Deependra Tyagi 7 , Muhammad Fahad Ehsan 8, 9
ABSTRACT
Silver-coated ZrO2 and individual ZrO2 nanoparticles have been synthesized using the simple reduction and co-precipitation methods, respectively. The synthesized products were examined using the X-ray diffraction, energy-dispersive X-ray and UV–visible spectroscopy, which confirmed the successful synthesis of materials. Scanning electron microscopy and transmission electron microscopy revealed the round-shaped nanoparticles of both materials. The cyclic voltammograms revealed the well-defined redox peaks and recommended the pseudocapacitive nature of the electrodes. The silver-coated zirconia showed higher specific capacitance of 792 F/g at 10 mV/s as compared to individual zirconia (10.22 F/g). Silver-coated ZrO2 also showed good power density of 274.5 W/kg at current density of 5 mA/cm2 through the galvanostatic charge discharge profile. Hence, the results suggest that silver-coated ZrO2 showed improved electrochemical performance as compared individual ZrO2 due to higher electrical conductivity and specific surface area. Hence, silvercoated ZrO2 nanoparticles can be employed as an electrode material for supercapacitor applications.
中文翻译:
用于超级电容器的银包覆氧化锆纳米粒子的增强电化学性能
摘要
分别使用简单的还原和共沉淀方法合成了涂银的ZrO 2和单个ZrO 2纳米颗粒。使用X射线衍射,能量色散X射线和UV-可见光谱对合成产物进行了检查,这证实了材料的成功合成。扫描电子显微镜和透射电子显微镜显示两种材料的圆形纳米颗粒。循环伏安图显示了明确定义的氧化还原峰,并推荐了电极的伪电容性质。与单个氧化锆(10.22 F / g)相比,涂银的氧化锆在10 mV / s时显示出更高的比电容792 F / g。镀银ZrO 2通过恒电流电荷放电曲线,在电流密度为5 mA / cm 2时,也显示出274.5 W / kg的良好功率密度。因此,结果表明,由于单独的ZrO 2具有更高的电导率和比表面积,因此与单个ZrO 2相比,涂银的ZrO 2显示出改善的电化学性能。因此,可以将涂银的ZrO 2纳米颗粒用作超级电容器应用的电极材料。