微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究

方华; 王力臻; 高可政; 方薇; 陈丹丹; 范弘扬; 裴梦莎

doi:10.3969/j.issn.2096-1553.2017.4.002

CN 41-1437/TS ISSN 2096-1553

微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究

方华 , 王力臻 , 高可政 , 方薇 , 陈丹丹 , 范弘扬 , 裴梦莎

方华, 王力臻, 高可政, 等. 微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究[J]. 轻工学报, 2017, 32(4): 8-15. doi: 10.3969/j.issn.2096-1553.2017.4.002

引用本文: 方华, 王力臻, 高可政, 等. 微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究[J]. 轻工学报, 2017, 32(4): 8-15. doi: 10.3969/j.issn.2096-1553.2017.4.002

FANG Hua, WANG Li-zhen, GAO Ke-zheng, et al. Study on preparation and capacitive properties of three dimensional porous graphene by microwave radiation pyrolysis expansion method[J]. Journal of Light Industry, 2017, 32(4): 8-15. doi: 10.3969/j.issn.2096-1553.2017.4.002

Citation: FANG Hua, WANG Li-zhen, GAO Ke-zheng, et al. Study on preparation and capacitive properties of three dimensional porous graphene by microwave radiation pyrolysis expansion method[J]. Journal of Light Industry, 2017, 32(4): 8-15. doi: 10.3969/j.issn.2096-1553.2017.4.002

微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究

郑州轻工业学院材料与化学工程学院, 河南郑州 450001
基金项目: 国家自然科学基金-河南人才培养联合基金资助项目（U1504204）
中图分类号: TQ152

Study on preparation and capacitive properties of three dimensional porous graphene by microwave radiation pyrolysis expansion method

College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
Received Date: 2017-04-28
Available Online: 2017-07-15
CLC number: TQ152

摘要: 采用微波辐射热解膨胀法制备了三维多孔石墨烯.利用FE-SEM，TEM和低温氮气吸脱附测试表征所制备的三维多孔石墨烯的形貌和孔结构，将所制备的三维多孔石墨烯组装模拟超级电容器，并利用循环伏安、恒流充放电和交流阻抗等电化学测试方法研究其电化学性能.结果表明：所制备的石墨烯具有蠕虫状三维多孔的形貌，其纳米片呈半透明的薄纱状，具有明显的石墨烯片层的褶皱；三维多孔石墨烯的比表面积达158.7 m²·g^-1，平均孔径为11.2 nm；三维多孔石墨烯具有优异的电化学电容性能，当电流密度为1.25 A·g^-1时，比电容为161 F·g^-1，电流密度增加到25.00 A·g^-1时，比电容为91 F·g^-1，在1.25 A·g^-1电流密度下循环充放电5000次后，容量保持率为90%，循环稳定性较好.
- 三维多孔石墨烯 /
- 微波辐射热解膨胀法 /
- 超级电容器
Abstract: Wormlike three dimensional (3D) porous graphene was prepared by microwave radiation pyrolysis expansion method.The morphology and pore structure of the as-prepared samples were characterized by SEM, TEM and N₂ adsorption/desorption test.Simulated supercapacitors were assembled to perform electrochemical test by using the as-prepared 3D graphene.And the electrochemical properties were tested by cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance test. The results showed wormlike 3D porous structure was characterized by translucent gossamer-like morphology and had obvious folds belonging to grephene nanosheet. The sample showed a specific surface area of 158.7 m²·g^-1 and an average pore size of 11.2 nm.The as-prepared graphene showed excellent electrochemical performances, with a specific capacitance of 161 F·g^-1 at 1.25 A·g^-1 and 91 F·g^-1 when the current increased to 25.00 A·g^-1. At 1.25 A·g^-1,the capacity retention rate was 90% after cycling charge and discharge 5000 times,which indicated the cycle stability was excellent.
- three dimensional porous graphene /
- microwave radiation pyrolysis expansion method /
- super capacitor
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方华, 王力臻, 高可政, 等. 微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究[J]. 轻工学报, 2017, 32(4): 8-15. doi: 10.3969/j.issn.2096-1553.2017.4.002

微波辐射热解膨胀法制备三维多孔石墨烯及其电容性能研究

郑州轻工业学院材料与化学工程学院, 河南郑州 450001

收稿日期: 2017-04-28
网络出版日期: 2017-07-15

基金项目: 国家自然科学基金-河南人才培养联合基金资助项目（U1504204）

关键词:

摘要: 采用微波辐射热解膨胀法制备了三维多孔石墨烯.利用FE-SEM，TEM和低温氮气吸脱附测试表征所制备的三维多孔石墨烯的形貌和孔结构，将所制备的三维多孔石墨烯组装模拟超级电容器，并利用循环伏安、恒流充放电和交流阻抗等电化学测试方法研究其电化学性能.结果表明：所制备的石墨烯具有蠕虫状三维多孔的形貌，其纳米片呈半透明的薄纱状，具有明显的石墨烯片层的褶皱；三维多孔石墨烯的比表面积达158.7 m²·g^-1，平均孔径为11.2 nm；三维多孔石墨烯具有优异的电化学电容性能，当电流密度为1.25 A·g^-1时，比电容为161 F·g^-1，电流密度增加到25.00 A·g^-1时，比电容为91 F·g^-1，在1.25 A·g^-1电流密度下循环充放电5000次后，容量保持率为90%，循环稳定性较好.

English Abstract

Study on preparation and capacitive properties of three dimensional porous graphene by microwave radiation pyrolysis expansion method

College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China

Received Date: 2017-04-28
Available Online: 2017-07-15

Abstract: Wormlike three dimensional (3D) porous graphene was prepared by microwave radiation pyrolysis expansion method.The morphology and pore structure of the as-prepared samples were characterized by SEM, TEM and N₂ adsorption/desorption test.Simulated supercapacitors were assembled to perform electrochemical test by using the as-prepared 3D graphene.And the electrochemical properties were tested by cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance test. The results showed wormlike 3D porous structure was characterized by translucent gossamer-like morphology and had obvious folds belonging to grephene nanosheet. The sample showed a specific surface area of 158.7 m²·g^-1 and an average pore size of 11.2 nm.The as-prepared graphene showed excellent electrochemical performances, with a specific capacitance of 161 F·g^-1 at 1.25 A·g^-1 and 91 F·g^-1 when the current increased to 25.00 A·g^-1. At 1.25 A·g^-1,the capacity retention rate was 90% after cycling charge and discharge 5000 times,which indicated the cycle stability was excellent.