羧基功能化和表面活性剂修饰对石墨烯电化学性能的影响

doi:10.15541/jim20150378

无机材料学报 ›› 2016, Vol. 31 ›› Issue (2): 220-224.DOI: 10.15541/jim20150378 CSTR: 32189.14.10.15541/jim20150378

• • 上一篇

羧基功能化和表面活性剂修饰对石墨烯电化学性能的影响

于建华^{1, 2}, 许丽丽¹, 朱倩倩¹, 王晓霞¹, 云茂金³, 董立峰¹

(1. 青岛科技大学材料科学与工程学院, 青岛266042; 2. 中国科学院上海硅酸盐研究所, 特种无机涂层重点实验室, 上海201899; 3.青岛大学物理科学学院, 青岛266071)

收稿日期:2015-08-13 修回日期:2015-10-19 出版日期:2016-02-20 网络出版日期:2016-01-15
作者简介:于建华. E-mail: jianhuayu@qust.edu.cn

Superior Electrochemical Performance of Graphene via Carboxyl Functionalization and Surfactant Intercalation

YU Jian-Hua^1,2, XU Li-Li¹, ZHU Qian-Qian¹, WANG Xiao-Xia¹, YUN Mao-Jin³, DONG Li-Feng¹

(1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; 2. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China; 3.?College of Physics Science, Qingdao University, Qingdao 266071, China)

Received:2015-08-13 Revised:2015-10-19 Published:2016-02-20 Online:2016-01-15
About author:YU Jian-Hua (1984–), female, assistant professor. E-mail: jianhuayu@qust.edu.cn
Supported by:
Qingdao Municipal Science and Technology Program (13-1-4-219-jch);Open Fund of Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences (KLICM-2012-06);National Natural Science Foundation of China (51172113 & 51373086);International Science & Technology Cooperation Program of China (2014DFA60150)

摘要/Abstract

摘要：

通过简单的两步溶液法对石墨烯进行羧基接枝和表面活性剂修饰, 并研究其电化学性能。研究结果表明, 与纯石墨烯(比电容50 F/g)相比, 表面活性剂本身并不能有效提高石墨烯的比电容(45 F/g), 羧基功能化可以将石墨烯的比电容提高至130 F/g。而羧基功能化和表面活性剂修饰双处理工艺能够将石墨烯的比电容提高到230 F/g, 且经800次充放电循环后其比电容仍然具有95%的保持率, 表明该材料具有良好的循环稳定性。因此, 调控石墨烯的表面化学特性对提高其电化学性能具有重要的意义。

关键词: 石墨烯, 功能化, 电化学性能

Abstract:

Superior capacitance of carboxyl functionalized and surfactant-intercalated graphene were prepared by a relatively simple with two-step solution-based processing technique. In comparison to pristine graphene, surface carboxyl functionalization and surfactant intercalation can tailor its specific capacitance from 50 F/g to 230 F/g. Meanwhile, the modified materials retain more than 95% of their capacitance after 800 charge-discharge cycles, demonstrating good cyclic stability. Surfactant itself cannot improve the performance of pristine graphene as graphene intercalated with surfactant has a specific capacitance of 45 F/g, however, carboxyl groups can dramatically enhance specific capacitance to 130 F/g. The excellent performance of functionalized graphene emphasizes the importance of controlling its surface chemistry.

Key words: graphene, functionalization, electrochemical performance

中图分类号:

TQ174

于建华, 许丽丽, 朱倩倩, 王晓霞, 云茂金, 董立峰. 羧基功能化和表面活性剂修饰对石墨烯电化学性能的影响[J]. 无机材料学报, 2016, 31(2): 220-224.

YU Jian-Hua, XU Li-Li, ZHU Qian-Qian, WANG Xiao-Xia, YUN Mao-Jin, DONG Li-Feng. Superior Electrochemical Performance of Graphene via Carboxyl Functionalization and Surfactant Intercalation[J]. Journal of Inorganic Materials, 2016, 31(2): 220-224.

图/表 4

Fig. 1 FTIR spectra of various graphene-based samples (PG, PGS, PGC, and PGCS)

Fig. 2 The N2 adsorption-desorption isotherms (a) and the pore size distribution (b) of the samples

Table 1 BET surface areas, pore volumes, and average pore sizes of obtained samples.

Samples	BET surface area/(m²·g^-1)	Pore volume/(cm³·g^-1)	Average pore size/nm
PG PGS PGC PGCS	88.7 74.6 104.6 102.1	0.37 0.37 0.38 0.40	16.8 19.8 14.5 15.8

Fig. 3 (a) CV curves (at 50 mV/s, b) galvanostatic charge/discharge curves (at current density of 1 A/g), (c) nyquist plots of PG, PGS, PGC, and PGCS, and (d) cyclic stability of PCS and PGCS electrodes at current density of 1 A/g (1 mol/L H2SO4 being used as electrolyte)

参考文献 17

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羧基功能化和表面活性剂修饰对石墨烯电化学性能的影响

Superior Electrochemical Performance of Graphene via Carboxyl Functionalization and Surfactant Intercalation

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