水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响

引用本文: 汪建德, 彭同江, 孙红娟, 侯云丹. 水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响[J]. 物理化学学报, 2014, 30(11): 2077-2084. doi: 10.3866/PKU.WHXB201409152 shu

Citation: WANG Jian-De, PENG Tong-Jiang, SUN Hong-Juan, HOU Yun-Dan. Effect of the Hydrothermal Reaction Temperature on Three-Dimensional Reduced Graphene Oxide's Appearance, Structure and Super Capacitor Performance[J]. Acta Physico-Chimica Sinica, 2014, 30(11): 2077-2084. doi: 10.3866/PKU.WHXB201409152 shu

水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响

基金项目:
国家自然科学基金(41272051) (41272051)

西南科技大学博士基金(11ZX7135) (11ZX7135)

西南科技大学研究生创新基金(14ycx003)资助项目 (14ycx003)

摘要:

以氧化石墨凝胶制备的氧化石墨烯溶胶为前驱体, 在120-220 ℃条件下, 采用水热法制备了系列不同还原程度的三维还原氧化石墨烯, 采用扫描电镜(SEM), X射线衍射(XRD), 傅里叶变换红外(FTIR)光谱, X射线光电子能谱(XPS)和电化学测试等手段研究了水热反应温度对材料形貌、结构和超级电容性能的影响. 结果表明: 采用水热法制备的三维还原氧化石墨烯呈多孔网状结构, 材料的体积和内部网状孔径随着水热反应温度的升高而减小; 同时, 氧化石墨烯的还原程度随反应温度的升高而增加, 有序度提高, 其结构逐渐向着类石墨结构转化; 而材料的比电容和能量密度则随反应温度的升高呈现出先增大后减小的趋势, 且均以双电层电容为主;相比之下, 当水热反应温度为180 ℃时, 制备的三维还原氧化石墨烯具有最佳的超级电容性能, 在电解液为6mol·L^-1的KOH溶液中, 0.5 A·g^-1电流密度下其比电容达到315 F·g^-1, 10 A·g^-1时仍能保持212 F·g^-1的高比容量, 能量密度为40.5 Wh·kg^-1, 5000次循环后比电容保持率为86%, 表现出了良好的电化学性能.

关键词:

English

Effect of the Hydrothermal Reaction Temperature on Three-Dimensional Reduced Graphene Oxide's Appearance, Structure and Super Capacitor Performance

1.
1. School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan Province, P. R. China;
2. Center of Forecasting and Analysis, Southwest University of Science and Technology, Mianyang 621010, Sichuan Province, P. R. China;
3. Institute of Mineral Materials & Application, Southwest University of Science and Technology, Mianyang 621010, Sichuan Province, P. R. China
Received Date: 28 July 2014
Available Online: 30 October 2014
Fund Project:
国家自然科学基金(41272051)

西南科技大学博士基金(11ZX7135)

西南科技大学研究生创新基金(14ycx003)资助项目

Abstract:

Three-dimensional reduction of graphene oxide with a series of different degrees of reduction was performed by the hydrothermal method in the temperature range from 120 to 220 ℃, with graphene oxide sols as the precursor and prepared by graphite oxide gels. The effect of the temperature of the hydrothermal reaction on the materials appearance, structure, and super capacitor performance was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. The results show that the prepared three dimensional reduction of graphene oxide was porous and reticulated, and its volume and inner mesh aperture gradually decreased with increasing temperature, while its degree of reduction and order increased at the same time, and its structure gradually transformed to the graphite oxide structure. However, thematerials' specific capacitance and energy density showed the tendency of first increasing and then decreasing, with the electric double-layer capacitor mainly remaining. The three-dimensional reduction of graphene oxide materials at 180 ℃ resulted in the best super capacitor performance, with a specific capacitance of 315 F·g^-1 when the current density was 0.5 A·g^-1 and 212 F·g^-1 when the current density was 10 A·g^-1. Its energy density was 40.5 Wh·kg^-1 and its specific capacitance was 86% after 5000 cycles, with all these properties indicating its od super capacitor performance.

Key words:

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响

English

Effect of the Hydrothermal Reaction Temperature on Three-Dimensional Reduced Graphene Oxide's Appearance, Structure and Super Capacitor Performance

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响

English

Effect of the Hydrothermal Reaction Temperature on Three-Dimensional Reduced Graphene Oxide's Appearance, Structure and Super Capacitor Performance

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

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