激光直写微型RGO/MWCNT/CF平面柔性超级电容器的制备及性能

doi:10.7503/cjcu20190480

高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (2): 300.doi: 10.7503/cjcu20190480

激光直写微型RGO/MWCNT/CF平面柔性超级电容器的制备及性能

关芳兰¹,李昕^1,^*(),张群¹,龚¹,林紫钰¹,陈耀¹,王乐军²

^1. 北京服装学院材料科学与工程学院, 服装材料研究开发与评价北京市重点实验室, 北京市纺织纳米纤维工程技术研究中心, 北京 100029
^2. 恒天纤维集团有限公司, 北京 100020

收稿日期:2019-09-06 出版日期:2020-02-10 发布日期:2019-11-04
通讯作者: 李昕 E-mail:clylx@mail.bift.edu.cn
基金资助:
国家自然科学基金(51873003);北京市教委面上项目(KM201810012005);北京市教委面上项目(KZ201910012015);北京服装学院高水平教师队伍建设专项资金(BIFTXZ201802);北京市朝阳区协同创新项目资助(CYXC1718)

Fabrication and Capacitance Performance of Laser-machined RGO/MWCNT/CF In-plane Flexible Micro-supercapacitor ^†

GUAN Fanglan¹,LI Xin^1,^*(),ZHANG Qun¹,GONG Yan¹,LIN Ziyu¹,CHEN Yao¹,WANG Lejun²

^1. Beijing Key Laboratory of Clothing Materials R&D and Assessments, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
^2. Heng Tian Fiber Group Co. Ltd., Beijing 100020, China

Received:2019-09-06 Online:2020-02-10 Published:2019-11-04
Contact: Xin LI E-mail:clylx@mail.bift.edu.cn
Supported by:
? Supported by the National Natural Science Foundation of China(51873003);the Scientific and Technology of Key and General Project of Beijing Educational Committee, China(KM201810012005);the Scientific and Technology of Key and General Project of Beijing Educational Committee, China(KZ201910012015);the Special Fund for the Construction of High-level Teachers in Beijing Institute of Fashion Technology, China(BIFTXZ201802);the Beijing Chaoyang District Collaborative Innovation Project, China(CYXC1718)

摘要/Abstract

摘要：

将采用改性Hummers法制备的氧化石墨烯与多壁碳纳米管(MWCNT)复合, 通过激光直写的方法制备了以棉织物(Cotton fabric, CF)为基底的石墨烯复合碳纳米管的同心圆形织物柔性平面超级电容器(RGO/MWCNT/CF). 通过扫描电子显微镜、 X 射线衍射和拉曼光谱技术对RGO/MWCNT/CF进行了表征, 并对超级电容器的电导率和电化学性能进行了测试. 结果表明, 电极材料经激光还原后导电率达到了7.19×10 ⁴ S/m, 表现出良好的导电性能. 以RGO/MWCNT/CF为工作电极、 PVA/LiCl凝胶为电解质组装的超级电容器具有良好的电化学性能, 在电位窗口为0~1 V、电流密度为40.8 mA/cm ²时比电容达到24 mF/cm ², 功率密度为61 mW·h/kg, 能量密度为1.22 mW·h/kg, 且循环1000次仍能保持92%的比电容.

关键词: 还原氧化石墨烯, 多壁碳纳米管, 棉织物, 柔性超级电容器, 激光加工

Abstract:

Micro and flexible supercapacitors are promising energy storage devices that were prerequisite in smart-garment system. However, the electrochemical performance of micro-supercapacitor is lower than that of batteries. Herein, RGO/MWCNT/CF micro-supercapacitor was prepared via laser-machining of graphene oxide(GO) and multi-walled carbon nanotubes(MWCNT) on the cotton fabric(CF). The GO was reduced and MWCNT was fixed on the graphene layer when the laser sculptured the in-plane pattern on the cotton fabric. This nanomaterial shows high electrical conductivity(7. 19×10 ⁴ S/m), attributed to the combined nanomaterials increasing the integrality of the conducting network. The best monolithic supercapacitor exhibited an area capacitance of 24 mF/cm ² in PVA-LiCl electrolyte(PVA=polyvinyl alcohol). The energy density attained 1.22 mW·h/kg and the power density reached 61 mW·h/kg. Micro-supercapacitors exhibited remarkably high mechanical fiexibility and showed a good cycling stability, with 92% retention of the specific capacity after 1000 cycles.

Key words: Reduced graphene oxide(RGO), Multi-walled carbon nanotubes(MWCNT), Cotton fabric(CF), Flexible supercapacitor, Laser-machining

中图分类号:

O646

TrendMD:

关芳兰,李昕,张群,龚,林紫钰,陈耀,王乐军. 激光直写微型RGO/MWCNT/CF平面柔性超级电容器的制备及性能. 高等学校化学学报, 2020, 41(2): 300.

GUAN Fanglan,LI Xin,ZHANG Qun,GONG Yan,LIN Ziyu,CHEN Yao,WANG Lejun. Fabrication and Capacitance Performance of Laser-machined RGO/MWCNT/CF In-plane Flexible Micro-supercapacitor ^†. Chem. J. Chinese Universities, 2020, 41(2): 300.

图/表 8

Fig.1 Fabrication of composite textile electrodes

Fig.2 SEM images of RGO/21%MWCNT/CF (A) Interface between RGO/MWCNT and cotton Fabric; (B) RGO/MWCNT layered structure reduced by 5 W laser; (C) cross-sectional image of the folded RGO/21%MWCNT/CF electrode; (D) network structure formed by RGO/21%MWCNT/CF electrode.

Fig.3 Raman spectra(A, B) and XRD patterns(C, D) of RGO/21%MWCNT/CF electrode with 4 W(A, C) and 5 W(B, D) laser reducing

Fig.4 Electrode conductivity of RGO/MWCNT/CF with 4 W(a) and 5 W(b) laser reducing

Fig.5 CV curves at scan rates from 10 mA/s to 100 mA/s of supercapacitors F(A) and A(B)

Fig.6 Cycling performance of supercapacitor A(A) and EIS spectra(B) of RGO/MWCNT/CF at a scan rate of 100 mA/cm2 a. Supercapacitor A; b. supercapacitor B; c. supercapacitor C; d. supercapacitor D; e. supercapacitor E; f. supercapacitor F. Inset of (A): GCD curves of supercapacitor A. Inset of (B): the equivalent circuit.

Fig.7 GCD curves(A) at a scan rates of 100 mA/cm2 and specific capacitance of supercapacitor G at different current density(B)

Table 1 Specific capacitance comparison among different planar flexible supercapacitor

Electrode material	Current collector	Base	Test condition	Capacitance/(mF·cm^-2)	Ref.
RGO/MWCNT	Foamed Ni	Cotton	100 mV/s	24	This work
Nylon-graphene	Au-coated vinyl film	Nonwoven	10 mV/s	10.37	[31]
GO	None	PET film	16.8 mA/cm³	2.32	[32]
GO	Patterned polyvinyl tap	None	40 mV/s	0.51	[33]
MXene	Au	Paper	20 mV/s	25	[34]

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激光直写微型RGO/MWCNT/CF平面柔性超级电容器的制备及性能

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激光直写微型RGO/MWCNT/CF平面柔性超级电容器的制备及性能

Fabrication and Capacitance Performance of Laser-machined RGO/MWCNT/CF In-plane Flexible Micro-supercapacitor †

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Fabrication and Capacitance Performance of Laser-machined RGO/MWCNT/CF In-plane Flexible Micro-supercapacitor ^†