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首页> 外文期刊>International Journal of Electrochemical Science >Enhancing the Supercapacitive Properties of Iron Oxide Electrode through Cu2+-doping: Cathodic Electrosynthesis and Characterization
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Enhancing the Supercapacitive Properties of Iron Oxide Electrode through Cu2+-doping: Cathodic Electrosynthesis and Characterization

机译：通过Cu 2 + 掺杂增强氧化铁电极的超电容性能：阴极电合成和表征

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摘要

Cu2+ doped iron oxide nanoparticles (Cu-IONPs) are prepared via a one-step facile electrodeposition procedure. In this procedure, Cu-IONPs are electro-deposited in a two-electrode set up from an additive-free aqueous solution of mixed Fe(NO3)3, FeCl2 and CuCl2 salts. The applied deposition parameters were current density of 10 mA cm-2, bath temperature of 25oC and deposition time of 30 min. The structural and morphological characterizations through X-ray diffraction (XRD), field emission electron microscopy (FE-SEM) and energy-dispersive X-ray (EDX) confirmed that the fabricated Cu-IONPs sample is composed of Cu2+ doped magnetite phase with particles with average size of 20 nm. Magnetic studies by VSM showed that the deposited Cu-IONPs provide proper super- paramagnetic characters of saturation magnetization(Ms=54.47 emu g–1), remanent magnetization (Mr) –1 (Mr=0.41 emu g ) and coercivity (HCi=10.53 G). The obtained electrochemical data indicated that Cu- IONPs are enable to exhibit specific capacitance as high as 189.6 F g?1 at a discharging current of 2 A g?1, and 88.8% capacity retention after 2000 GCD cycling. Based on the obtained results, our developed electrosynthesis method is proposed as a facile route for the synthesis of high performance Cu-IONPs.
机译：通过一步式简便电沉积程序制备了掺杂Cu2 +的氧化铁纳米颗粒（Cu-IONPs）。在此过程中，将Cu-IONPs电沉积在由混合的Fe（NO3）3，FeCl2和CuCl2盐组成的无添加剂水溶液中的两电极中。施加的沉积参数为10 mA cm-2的电流密度，25oC的浴温和30分钟的沉积时间。通过X射线衍射（XRD），场发射电子显微镜（FE-SEM）和能量色散X射线（EDX）对结构和形态进行表征，证实了所制备的Cu-IONPs样品由掺杂有Cu2 +的磁铁矿相和颗粒组成。平均尺寸为20 nm。 VSM的磁性研究表明，沉积的Cu-IONPs具有适当的超顺磁特性，即饱和磁化强度（Ms = 54.47 emu g–1），剩余磁化强度（Mr）–1（Mr = 0.41 emu g）和矫顽力（HCi = 10.53） G）。所获得的电化学数据表明，Cu-IONPs能够在2 A g？1的放电电流下表现出高达189.6 F g？1的比电容，并在2000 GCD循环后保持88.8％的容量。根据获得的结果，提出了我们开发的电合成方法，作为合成高性能Cu-IONPs的简便途径。

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