Preparation of graphene/δ-MnO2 composites and supercapacitor performance

doi:10.11949/j.issn.0438-1157.20171036

CIESC Journal ›› 2017, Vol. 68 ›› Issue (12): 4824-4832.DOI: 10.11949/j.issn.0438-1157.20171036

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Preparation of graphene/δ-MnO₂ composites and supercapacitor performance

ZHU Hongyan^1,2, ZHAO Jianguo^1,2, PANG Mingjun², JIANG Shang², XING Baoyan², QIANG Dingding², DU Yaqin²

1 Institute of Chemistry and Materials Science, Shanxi Normal University, Linfen 041000, Shanxi, China;
2 Institute of Carbon Materials, Shanxi Datong University, Datong 037009, Shanxi, China

Received:2017-07-31 Revised:2017-08-28 Online:2017-12-05 Published:2017-12-05
Supported by:
supported by Shanxi Graphene Industrialization Application Technology of Collaborative Innovation Center, Shanxi Graphene Functional Materials Engineering Technology Research Center (201705D141034), the Special Talents in Shanxi Province (Talents Science and Technology Innovation)(201705D211010),the Key Research Plan (Project) in Industry of Shanxi Province (201703D121037-2) and Datong Applied Basic Research (2017123).

石墨烯/δ-MnO₂复合材料的制备及其超级电容器性能

朱红艳^1,2, 赵建国^1,2, 庞明俊², 蒋尚², 邢宝岩², 强丁丁², 杜雅琴²

1 山西师范大学化学与材料科学学院, 山西临汾 041000;
2 山西大同大学炭材料研究所, 山西大同 037009

通讯作者: 赵建国
基金资助:
山西省石墨烯产业化应用技术协同创新中心项目；山西省石墨烯功能材料工程技术研究中心项目（201705D141034）；山西省人才专项（优秀人才科技创新）（201705D211010）；山西省重点研发计划（工业项目）（201703D121037-2）；大同市应用基础研究项目（2017123）。

Abstract

Abstract:

This work mainly uses the one pot to synthesis RGO/δ-MnO₂ composites, which is characterized using X-ray powder diffraction (XRD), low pressure nitrogen adsorption stripping (BET), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), energy spectrum (EDS) and thermal gravimetric analyzer (TGA). The electrochemical performance is tested by the cyclic voltammetry (CV), constant current charge/discharge test (GCD) and loop test. Results show that the RGO/δ-MnO₂ composites possess more excellent electrochemical performance than pure δ-MnO₂ and pure graphene. When the current density is 1 A·g^-1, the specific capacitance of RGO/δ-MnO₂ composite can reach 322.6 F·g^-1, which is higher than that of the pure δ-MnO₂ (234.2 F·g^-1) and the pure graphene (212.1 F·g^-1). Moreover, the specific capacitance retention of RGO/δ-MnO₂ composites remains 79.1% when current density increases to 10 A·g^-1. The specific capacitance of RGO/δ-MnO₂ composite is still as high as 252 F·g^-1 (99.6%) even after 1000 times constant current charge/discharge tests. These results indicate that the composite will be a kind of promising supercapacitor electrode material.

Key words: supercapacitor, electrode material, specific capacitance, electrochemistry

摘要：

采用螯合法制备了RGO/δ-MnO₂复合材料，并用X射线粉末衍射（XRD）、低压氮气吸附脱附（BET）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱（EDS）、热重（TGA）对其结构和物相进行表征。采用循环伏安测试（CV）、恒电流充放电（GCD）以及循环测试对所制材料电化学储能进行测试。结果表明RGO/δ-MnO₂复合材料比纯石墨烯和纯δ-MnO₂具有更优异的电化学性能。当电流密度为1 A·g^-1时，RGO/δ-MnO₂复合材料的比电容可达322.6 F·g^-1，比纯δ-MnO₂电极材料高234.2 F·g^-1，比纯石墨烯高212.1 F·g^-1。当电流密度放大10倍后，RGO/δ-MnO₂复合材料的比电容保留率为79.1%。在1000次恒流充放电测试后，比电容为252 F·g^-1（99.6%），说明该方法制备的RGO/δ-MnO₂复合材料是一种有应用前景的超级电容器电极材料。

关键词: 超级电容器, 电极材料, 比电容, 电化学

CLC Number:

TQ031.2

ZHU Hongyan, ZHAO Jianguo, PANG Mingjun, JIANG Shang, XING Baoyan, QIANG Dingding, DU Yaqin. Preparation of graphene/δ-MnO₂ composites and supercapacitor performance[J]. CIESC Journal, 2017, 68(12): 4824-4832.

朱红艳, 赵建国, 庞明俊, 蒋尚, 邢宝岩, 强丁丁, 杜雅琴. 石墨烯/δ-MnO₂复合材料的制备及其超级电容器性能[J]. 化工学报, 2017, 68(12): 4824-4832.

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Preparation of graphene/δ-MnO₂ composites and supercapacitor performance

石墨烯/δ-MnO₂复合材料的制备及其超级电容器性能

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