SnO<sub>2</sub>/石墨纳米片复合电极及其在超级电容器中的应用

引用本文: 陈婵娟, 胡中爱, 胡英瑛, 李丽, 杨玉英, 安宁, 李志敏, 吴红英. SnO₂/石墨纳米片复合电极及其在超级电容器中的应用[J]. 物理化学学报, 2014, 30(12): 2256-2262. doi: 10.3866/PKU.WHXB201409302 shu

Citation: CHEN Chan-Juan, HU Zhong-Ai, HU Ying-Ying, LI Li, YANG Yu-Ying, AN Ning, LI Zhi-Min, WU Hong-Ying. SnO₂/Graphite Nanosheet Composite Electrodes and Their Application in Supercapacitors[J]. Acta Physico-Chimica Sinica, 2014, 30(12): 2256-2262. doi: 10.3866/PKU.WHXB201409302 shu

SnO₂/石墨纳米片复合电极及其在超级电容器中的应用

基金项目:
国家自然科学基金(20963009, 21163017) (20963009, 21163017)

高等学校博士学科点专项科研基金(20126203110001)资助项目 (20126203110001)

摘要:

在电场的作用下对石墨棒进行电化学剥离, 使其表面形成相互平行排列, 且垂直于石墨棒基底的二维(2D)石墨纳米片阵列(GNSA). 然后通过阴极还原电沉积法制备SnO₂/石墨纳米片阵列(SnO₂/GNSA)复合电极.采用场发射扫描电镜(FE-SEM)、X射线衍射(XRD)和傅里叶变换红外(FT-IR)光谱对其形貌和结构进行了表征.电化学测试表明该复合电极具有优异的超电容性能, 在0.5 mol·L^-1 LiNO₃电解质中, 扫描速率为5 mV·s^-1, 电位窗口为1.4 V时, 比电容达4015 F·m^-2. 由SnO₂/GNSA复合电极和相同电解质组装成的对称型超级电容器, 在扫描速率为5 mV·s^-1时, 其电位窗口可增至1.8 V, 能量密度达到0.41 Wh·m^-2, 循环5000 圈后其比电容仍保持为初始比电容的81%.

关键词:

English

SnO₂/Graphite Nanosheet Composite Electrodes and Their Application in Supercapacitors

1.
Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
Received Date: 09 June 2014
Available Online: 27 November 2014
Fund Project:
国家自然科学基金(20963009, 21163017)

高等学校博士学科点专项科研基金(20126203110001)资助项目

Abstract:

Electrochemical exfoliation of graphite rods under the action of an electric field force led to the formation of two-dimensional (2D) graphite nanosheet arrays (GNSAs) perpendicular to the surface of the graphite substrate and parallel to each other in arrangement. Subsequently, SnO₂/graphite nanosheet array (SnO₂/GNSA) composite electrodes were prepared by the cathodic reduction electrodeposition method. The morphology, composition, and microstructure of the samples were characterized using field emission scanning electron microscopy (FESEM), powder X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy, respectively. Electrochemical measurements showed that the composite electrodes achieved specific capacitance values as high as 4105 F·m^-2 in the potential window up to 1.4 V with a scan rate of 5 mV·s^-1 in 0.5 mol·L^-1 LiNO₃ solution. Asymmetric supercapacitor fabricated with the as-prepared SnO₂/GNSAs exhibited excellent capacitive performance with energy density of 0.41 Wh·m^-2 in the potential window up to 1.8 V and retention of 81% after 5000 cycles.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

SnO₂/石墨纳米片复合电极及其在超级电容器中的应用

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中国化学会秘书处

SnO2/石墨纳米片复合电极及其在超级电容器中的应用

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