Hydrolysis Precipitation Synthesis of SnO₂·XH₂O as Electrode Materials for Supercapacitors

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• 作者：Wang Shuyun ; Zhao Jiachang ; ^{zjc@sues.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Gao Shuai ; Gao Yilong ; Liu Xijian ; Wu Yuandong ; Xu Jingli
• 关键词：SnO2· ; XH2O ; hydrolysis precipitation process ; supercapacitors ; electrochemical performance
• 刊名：Rare Metal Materials and Engineering
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：45
• 期：1
• 页码：62-65
• 全文大小：954 K

文摘

Electrode materials of SnO₂·XH₂O were synthesized by hydrolysis precipitation process. After calcination at various temperatures, the materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). XRD patterns confirm that the structure of SnO₂·XH₂O is tetragonal (rutile). TEM images reveal the morphology of the SnO₂·XH₂O. TGA shows the water content in SnO₂·XH₂O decreases as the calcination temperature increases. Electrochemical tests, such as cyclic voltammetry (CV), chronopotentiometry and cycling were also performed to study the supercapacitor behavior of SnO₂·XH₂O. CV results indicate that SnO₂·XH₂O calcined at 200 °C has a specific capacitance of 36.1 F/g at the scan rate of 5 mV/s in 0.5 mol/L H₂SO₄ electrolyte. Cycling test of the same sample also shows excellent long-term cyclic stability, which has lost less than 2% of the total specific capacitance after 2000 cycles. These results indicate that the prepared SnO₂·XH₂O materials are excellent candidates as electrode materials for supercapacitors.