Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO<sub>2</sub>/CNTs/MnO<sub>2</sub> mesoporous materials

CHEN Zhiyuan; YAN Dong; QIAN Fan; LI Wencui

doi:10.11949/0438-1157.20190826

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Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO₂/CNTs/MnO₂ mesoporous materials

Material science and engineering\, nanotechnology | 更新时间：2026-07-24

- Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO₂/CNTs/MnO₂ mesoporous materials
- CIESC Journal Vol. 70, Issue 12, Pages: 4864-4871(2019)
- 作者机构：
  
  大连理工大学化工学院，辽宁大连 116024
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190826
  CLC： TQ 152
- Received：18 July 2019，
  
  Revised：2019-09-18，
  
  Online First：09 June 2020，
  
  Published：05 December 2019
- 稿件说明：
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陈志远, 颜冬, 钱凡, 李文翠. 高导电三明治状MnO₂/CNTs/MnO₂介孔材料的制备及其赝电容性能[J]. 化工学报, 2019, 70(12): 4864-4871 DOI: 10.11949/0438-1157.20190826.

CHEN Zhiyuan, YAN Dong, QIAN Fan, LI Wencui. Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO₂/CNTs/MnO₂ mesoporous materials[J]. CIESC Journal, 2019, 70(12): 4864-4871 DOI: 10.11949/0438-1157.20190826.
陈志远, 颜冬, 钱凡, 李文翠. 高导电三明治状MnO₂/CNTs/MnO₂介孔材料的制备及其赝电容性能[J]. 化工学报, 2019, 70(12): 4864-4871 DOI: 10.11949/0438-1157.20190826. DOI：

CHEN Zhiyuan, YAN Dong, QIAN Fan, LI Wencui. Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO₂/CNTs/MnO₂ mesoporous materials[J]. CIESC Journal, 2019, 70(12): 4864-4871 DOI: 10.11949/0438-1157.20190826. DOI：

摘要

MnO

具有低成本、无毒性、高天然丰度和优异的理论比电容等优点，被认为是一种极具前景的超级电容器(SC)电极材料。赝电容电极材料MnO

仍然存在导电性差以及充放电过程中易剥落的问题。本文利用恒电流沉积的方法在硝酸预氧化处理的碳纸表面制备了一种MnO

/CNTs/MnO

复合电极材料。X射线衍射(XRD)、扫描电子显微镜(SEM)和氮吸附测试证明，所制备的复合材料具有一种三明治状的夹层结构，同时富含5 nm左右的介孔，介孔结构能够保证电解液离子的高效传输。采用三维立体的碳纸能够为MnO

提供丰富的附着位点，而电沉积法合成的α-MnO

生长在有效的导电位点上，具有蓬松多孔的形貌，在MnO

发生膨胀/收缩过程中，这种海绵状形貌可以有效降低材料受到的膨胀应力。中间层碳纳米管(CNTs)相互搭接于内外两层MnO

之间，作为一种导电中继，提高了复合材料的导电性。该复合材料具有优异的电化学性能：在0.1 A·g

-1

的电流密度下，能够获得428.8 F·g

-1

的可逆比电容，并在5 A·g

-1

的高电流密度下仍能具有80%的电容保持率。同时，电极表现出优异的循环稳定性，在1 A·g

-1

循环6000次之后比电容仅衰减5%。

Abstract

MnO

is regarded as the most attrac

tive electrode material for supercapacitor (SC) because of its low cost and non-toxic nature

high natural abundance

and superb theoretical specific capacitance. The tantalum capacitor electrode material MnO

still has a problem of poor conductivity and easy peeling during charging and discharging. In this study

a sandwich MnO

/CNTs/MnO

mesoporous composite is fabricated by a facile galvanostatic electrochemical deposition approach on the surface of carbon paper pre-oxidized by nitric acid

and the middle layer of CNTs was added by a simple smear-drying method. The crystal structure

surface morphology and pore characteristics of the sandwich composite are characterized by means of X-ray diffraction (XRD)

scanning electron microscopy (SEM) and nitrogen adsorption test. The prepared composite shows a sandwich structure with mesopores of about 5 nm

which could ensure the efficient diffusion of electrolyte ions. Three-dimensional carbon paper could provide abundant conductive sites for attachment of MnO

. The synthesized α-MnO

has a fluffy and porous morphology

which could reduce the expansion stress of the composite effectively. The intermediate layer of carbon nanotubes (CNTs) serve as conductive media relay between the inner and outer layers of MnO

to further improve the conductivity of composite. The composite exhibits excellent electrochemical performance: the electrode has a reversible specific capacity of 428.8 F·g

-1

at a current density of 0.1 A·g

-1

and an outstanding specific capacitance retention of

ca.

80% at 5 A·g

-1

. Moreover

the electrode still has an excellent cycle stability (95% retention rate) at a current density of 1 A·g

-1

after 6000 cycles.

关键词

Keywords

references

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⁰

Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO2/CNTs/MnO2 mesoporous materials

DOI：10.11949/0438-1157.20190826

摘要

Abstract

关键词

Keywords

references

Preparation and pseudocapacitance properties of highly conductive sandwich-shaped MnO₂/CNTs/MnO₂ mesoporous materials