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Improving supercapacitor performance of alkylated graphene nanosheets via partial fluorination on their alkyl chains
Alternative Title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
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
2015
Source PublicationRSC Adv.
Volume5Issue:112Pages:92159-92164
AbstractRedox-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.
Subtype论文
Subject Area高分子化学 ; 氟化学
DOI10.1039/c5ra19779a
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000364032500031
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sioc.ac.cn/handle/331003/39860
Collection高分子材料研究室
Corresponding AuthorLi WS(李维实); Chen QY(陈庆云)
Affiliation1.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
GB/T 7714
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.
APA 赵刚.,赵福刚.,孙建青.,陆洋.,王伟.,...&陈庆云.(2015).Improving supercapacitor performance of alkylated graphene nanosheets via partial fluorination on their alkyl chains.RSC Adv.,5(112),92159-92164.
MLA 赵刚,et al."Improving supercapacitor performance of alkylated graphene nanosheets via partial fluorination on their alkyl chains".RSC Adv. 5.112(2015):92159-92164.
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