Nafion改性多级孔径石墨烯气凝胶制备与性能研究

doi:10.15541/jim20170165

无机材料学报 ›› 2018, Vol. 33 ›› Issue (4): 469-474.DOI: 10.15541/jim20170165 CSTR: 32189.14.10.15541/jim20170165

所属专题：乘风破浪的新能源材料

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Nafion改性多级孔径石墨烯气凝胶制备与性能研究

王勇^1,2, 于云¹, 冯爱虎^1,2, 江峰^1,2, 胡学兵³, 宋力昕¹

1. 中国科学院上海硅酸盐研究所无机涂层重点实验室, 上海 200050;
2. 中国科学院大学, 北京 100049;
3. 景德镇陶瓷大学江西省高等学校无机膜重点实验室, 景德镇 333001

收稿日期:2017-04-10 出版日期:2018-04-30 网络出版日期:2018-03-27
作者简介:王勇. E-mail: ouyuu@foxmail.com

Nafion Modified Graphene Aerogel with Hierarchical Porous Structures

WANG Yong^1,2, YU Yun¹, FENG Ai-Hu^1,2, JIANG Feng^1,2, HU Xue-Bing³, SONG Li-Xin¹

1. Chinese Academy of Sciences Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Key Laboratory of Inorganic Membrane, Jindezhen Ceramic Institute, Jingdezhen 333001, China

Received:2017-04-10 Published:2018-04-30 Online:2018-03-27
About author:WANG Yong (1984-), male, candidate of PhD. E-mail: ouyuu@foxmail.com
Supported by:
National Natural Science Foundation of China (51662019)

摘要/Abstract

摘要：

通过溶胶-凝胶法制备了孔径小于1 μm的多级孔径新型石墨烯气凝胶。制备过程中, 首先通过Nafion对氧化石墨烯(GO)表面进行化学修饰, 并利用乙二胺还原制备石墨烯水凝胶, 最终通过冷冻干燥形成石墨烯气凝胶。实验发现Nafion可以有效减少制备过程中氧化石墨烯的团聚, 使石墨烯气凝胶形成多级孔径形貌。所得石墨烯气凝胶的孔径可控制在1 μm以内, 远小于传统石墨烯气凝胶材料的孔径(20~100 μm)。这种具有独特结构的石墨烯气凝胶表现出优异的性能, 例如高比表面积, 高孔隙率, 其电化学电容性能相对传统气凝胶提高了约40%。

关键词: 三维石墨烯, 石墨烯气凝胶, 石墨烯, 氧化石墨烯, Nafion

Abstract:

A novel graphene aerogel with pore size less than 1 µm was synthesized by Sol-Gel method, in which Nafion was skillfully introduced as modifiers connecting graphene oxides (GO). Ethylenediamine was used to produce a chemically linked graphene hydrogel during reducing process, which can then be freeze-dried to remove the absorbed water to form graphene aerogel. Nafion in GO solution prohibits the re-stacking of individual graphene sheets during reduction and freeze-drying process. By the above method, the pore size of as-prepared graphene aerogel could be effectively controlled within 1 µm, much less than that of the traditional graphene aerogel (20- 100 µm). The new graphene aerogel with unique structure exhibited excellent properties, such as high specific surface area, high porosity, and better electrochemical properties. All data suggest that this graphene aerogel may have promising application prospect in the field of energy.

Key words: three-dimensional graphene, graphene aerogel, graphene, graphene oxide, Nafion

中图分类号:

O613

王勇, 于云, 冯爱虎, 江峰, 胡学兵, 宋力昕. Nafion改性多级孔径石墨烯气凝胶制备与性能研究[J]. 无机材料学报, 2018, 33(4): 469-474.

WANG Yong, YU Yun, FENG Ai-Hu, JIANG Feng, HU Xue-Bing, SONG Li-Xin. Nafion Modified Graphene Aerogel with Hierarchical Porous Structures[J]. Journal of Inorganic Materials, 2018, 33(4): 469-474.

图/表 8

Fig. 1 AFM height image of GO (a), GO modified with Nafion (b) and the height profiles of GO (c) and GO modified with Nafion (d)

Fig. 2 XRD patterns of GO, rGO, graphite, GA and GA-Nafion

Fig. 3 Raman spectra of GO, rGO, GA and GA-Nafion

Fig. 4 FT-IR spectra of GO, rGO, GA and GA-Nafion

Fig. 5 SEM morphologies of GA (a), GO nano sheets modified with Nafion (b), GA-Nafion (c) and its high resolution morphology (d)

Fig. 6 Chemical structure of Nafion

Fig. 7 Specific surface area of GO, rGO, GO-EDA, and GA-Nafion

Fig. 8 Cyclic voltammogram of activated carbon (AC), GA and GA-Nafion

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Nafion改性多级孔径石墨烯气凝胶制备与性能研究

Nafion Modified Graphene Aerogel with Hierarchical Porous Structures

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