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Facile Hydrothermal Synthesis and Electrochemical Properties of CaMoO4 Nanoparticles for Aqueous Asymmetric Supercapacitors
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-06-14 00:00:00 , DOI: 10.1021/acssuschemeng.9b01708 Jai Bhagwan 1 , Sk. Khaja Hussain 1 , Jae Su Yu 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-06-14 00:00:00 , DOI: 10.1021/acssuschemeng.9b01708 Jai Bhagwan 1 , Sk. Khaja Hussain 1 , Jae Su Yu 1
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Calcium molybdate (CaMoO4) nanoparticles were prepared by a facile, adoptable, and cost-effective hydrothermal method. The synthesized nanoparticles were investigated by various material analysis techniques. The prepared nanomaterials were subjected as an electrode material for supercapacitors to check their electrochemical properties. The supercapacitive properties of CaMoO4 electrode material were obtained using the cyclic voltammetry, galvanostatic charging/discharging, and electrochemical impedance spectroscopy measurements. The specific capacity of the electrode material was found to be 118.25 mAh g–1 at 2 A g–1. At the high current density of 20 A g–1, the specific capacity of 50 mAh g–1 was obtained. To test the practical application of the electrode material, aqueous asymmetric supercapacitors (ASCs) were fabricated using CaMoO4 and activated carbon (AC) as positive and negative electrodes, respectively. The fabricated CaMoO4//AC device showed the specific capacity and energy density of 25.77 mAh g–1 and 18.68 W h kg–1, respectively at 0.5 A g–1. Twelve light-emitted diodes and a motor fan were powered using series-connected two ASC devices.
中文翻译：
水性不对称超级电容器的CaMoO 4纳米粒子的简便水热合成和电化学性能
钼酸钙（CaMoO 4）纳米粒子是通过一种简便，可采用且经济高效的水热法制备的。通过各种材料分析技术研究了合成的纳米颗粒。将制备的纳米材料用作超级电容器的电极材料，以检查其电化学性能。CaMoO 4电极材料的超电容特性使用循环伏安法，恒电流充电/放电和电化学阻抗谱测量获得。所述电极材料的比容量被发现是118.25毫安克-1以2A克-1。在20 A g –1的高电流密度下，比容量为50 mAh g –1获得了。为了测试电极材料的实际应用，分别使用CaMoO 4和活性炭（AC）作为正极和负极制造了水性不对称超级电容器（ASC）。所制造的CaMoO 4 // AC器件显示出25.77毫安克的比容量和能量密度-1和18.68 W时千克-1，分别在0.5 A克-1。使用串联的两个ASC设备为十二个发光二极管和一个电动机风扇供电。
更新日期：2019-06-14
中文翻译：
水性不对称超级电容器的CaMoO 4纳米粒子的简便水热合成和电化学性能
钼酸钙（CaMoO 4）纳米粒子是通过一种简便，可采用且经济高效的水热法制备的。通过各种材料分析技术研究了合成的纳米颗粒。将制备的纳米材料用作超级电容器的电极材料，以检查其电化学性能。CaMoO 4电极材料的超电容特性使用循环伏安法，恒电流充电/放电和电化学阻抗谱测量获得。所述电极材料的比容量被发现是118.25毫安克-1以2A克-1。在20 A g –1的高电流密度下，比容量为50 mAh g –1获得了。为了测试电极材料的实际应用，分别使用CaMoO 4和活性炭（AC）作为正极和负极制造了水性不对称超级电容器（ASC）。所制造的CaMoO 4 // AC器件显示出25.77毫安克的比容量和能量密度-1和18.68 W时千克-1，分别在0.5 A克-1。使用串联的两个ASC设备为十二个发光二极管和一个电动机风扇供电。
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