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Effects of deposition temperatures on the nanoflakes Co(OH)_2 porous films for supercapacitors

机译:沉积温度对超级电容器纳米薄片Co(OH)_2多孔膜的影响

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Nanoflakes Co(OH)_2 porous films were successfully synthesized by a facile electrochemical technique. The morphology was characterized by field emission scanning electron microscopy (FESEM). Electrochemical techniques such as cyclic voltammetry (CV), galvanostaitc charge/discharge and electrochemical impedance spectroscopy were used to study the effects of deposition temperatures on the capacitance of the films. The results exhibited that the Co(OH)_2 films single electrode had high specific capacitance in KOH electrolyte. A maximum specific capacitance of 2780 F/g could be achieved for the Co(OH)_2 film deposited at 50℃ in 2 M aqueous KOH with 0 to 0.4V potential at a charge-discharge current density of 4 mA/cm~2. Therefore, the obtained nanoflakes Co(OH)_2 porous films can be a potential application electrode material for supercapacitors.
机译:通过一种简便的电化学技术成功地合成了纳米片状的Co(OH)_2多孔薄膜。通过场发射扫描电子显微镜(FESEM)表征了形态。电化学技术,例如循环伏安法(CV),恒电流充/放电和电化学阻抗谱法,用于研究沉积温度对薄膜电容的影响。结果表明,Co(OH)_2薄膜单电极在KOH电解质中具有较高的比电容。在50mA的2M KOH水溶液中,在0到0.4V的电势下,在4mA / cm〜2的电流密度下,于50℃下沉积Co(OH)_2膜,可获得的最大比电容为2780 F / g。因此,获得的纳米薄片Co(OH)_2多孔膜可以作为超级电容器的潜在应用电极材料。

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