Preparation of graphene/δ-MnO<sub>2</sub> composites and supercapacitor performance

ZHU Hongyan; ZHAO Jianguo; PANG Mingjun; JIANG Shang; XING Baoyan; QIANG Dingding; DU Yaqin

doi:10.11949/j.issn.0438-1157.20171036

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Preparation of graphene/δ-MnO₂ composites and supercapacitor performance

更新时间：2025-12-10

- Preparation of graphene/δ-MnO₂ composites and supercapacitor performance
- CIESC Journal Issue 12, Pages: 4824-4832(2017)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171036
  CLC： Q031.2
- Online First：05 December 2017，
  
  Published：05 December 2017
- 稿件说明：
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ZHU Hongyan, ZHAO Jianguo, PANG Mingjun, et al. Preparation of graphene/δ-MnO₂ composites and supercapacitor performance[J]. CIESC Journal, 2017, (12): 4824-4832. DOI: 10.11949/j.issn.0438-1157.20171036.
DOI：

ZHU Hongyan, ZHAO Jianguo, PANG Mingjun, et al. Preparation of graphene/δ-MnO₂ composites and supercapacitor performance[J]. CIESC Journal, 2017, (12): 4824-4832. DOI: 10.11949/j.issn.0438-1157.20171036. DOI：

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。

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.

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Preparation of graphene/δ-MnO2 composites and supercapacitor performance

DOI：10.11949/j.issn.0438-1157.20171036

摘要

Abstract

关键词

Keywords

references

Preparation of graphene/δ-MnO₂ composites and supercapacitor performance