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学科主题: 高分子化学 ; 氟化学
题名: Improving supercapacitor performance of alkylated graphene nanosheets via partial fluorination on their alkyl chains
其他题名: 通过部分氟化烷基链提高烷基化纳米石墨薄片的超级电容器的性能
作者: Zhao G(赵刚)1; Zhao FG(赵福刚)1; Sun JQ(孙建青)1; Lu Y(陆洋)1; Wang W(王伟)1; Li WS(李维实)1; Chen QY(陈庆云)1
通讯作者: 李维实 ; 陈庆云
刊名: RSC Adv.
发表日期: 2015
DOI: 10.1039/c5ra19779a
卷: 5, 期:112, 页:92159-92164
收录类别: SCI
文章类型: 论文
英文摘要: Redox-active graphene materials are highly desirable for the production of high performance supercapacitors. Following our previous work that found that alkylated graphene nanosheets are a new kind of such material, we report here that the simple replacement of alkyl side chains with partially fluorinated alkyl chains further improves their capacitive electrode performance. In this work, one partially fluorinated graphene material (pFAG) was prepared by the reaction of KOH-pretreated graphene oxide with 2-perfluorohexylethyl bromide in the presence of a phase transfer catalyst. Compared with the graphene material modified with octyl side chains (AG), pFAG possesses a larger amount of residual oxygen functionalities, which is favorable to endow the material with a redox-active nature and achieve a larger faradaic capacitance. Moreover, pFAG presented a special self-assembly behavior and formed continuous and large plate-like objects in the solid state. Finally, a supercapacitor electrode was fabricated with pFAG and its performance was compared with the previously reported AG-based electrode in detail. It was found that the pFAG electrode has a much better capacitive performance than that based on AG (218.3 vs. 160.0 F g(-1) at a scan rate of 100 mV s(-1) by cyclic voltammetry, and 187.0 vs. 118.8 F g(-1) at a current density of 3 A g(-1) by galvanostatic charge/discharge method). When charge/discharge was carried out at 1 A g(-1), the specific capacitance of pFAG-based electrode reached 388.0 F g(-1), among the highest values of reported graphene-based electrodes. Furthermore, pFAG electrodes exhibited a good cycling stability. All these demonstrate graphene nanosheets modified with partially fluorinated alkyl chains would be a good way to achieve high performance redox-active electrode materials.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000364032500031
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/39860
Appears in Collections:高分子材料研究室_期刊论文

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作者单位: 1.中科院上海有机化学研究所, 有机氟化学重点实验室
2.中科院上海有机化学研究所, 有机功能分子合成与组装化学重点实验室

Recommended Citation:
Zhao G,Zhao FG,Sun JQ,et al. Improving supercapacitor performance of alkylated graphene nanosheets via partial fluorination on their alkyl chains[J]. RSC Adv.,2015,5(112):92159-92164.
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