High performance electrochemical capacitors based on MnO2/activated-carbon-paper

2015 ◽  
Vol 3 (24) ◽  
pp. 6166-6171 ◽  
Author(s):  
Zhiyu Cheng ◽  
Guiping Tan ◽  
Yongfu Qiu ◽  
Bing Guo ◽  
Faliang Cheng ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
High Performance ◽  
Electrochemical Capacitors ◽  
Rate Capability ◽  
Electrochemical Capacitor ◽  
High Specific Capacitance ◽  
Carbon Paper ◽  
First Time

The composite MnO2/activated-carbon-paper has been reported for the first time and it shows high specific capacitance and remarkable rate capability as an electrochemical capacitor.

Electrodeposition of manganese dioxide film on activated carbon paper and its application in supercapacitors with high rate capability

RSC Advances ◽  
2014 ◽  
Vol 4 (109) ◽  
pp. 64187-64192 ◽  
Author(s):  
Yongfu Qiu ◽  
Pingru Xu ◽  
Bing Guo ◽  
Zhiyu Cheng ◽  
Hongbo Fan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Manganese Dioxide ◽  
Specific Capacitance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
High Rate ◽  
Carbon Paper ◽  
High Rate Capability ◽  
First Time ◽  
Dioxide Film

The composite MnO2/ACP is reported for the first time and it shows high specific capacitance and remarkable rate capability.

Sustainable activated carbon fibers from liquefied wood with controllable porosity for high-performance supercapacitors

2014 ◽  
Vol 2 (30) ◽  
pp. 11706-11715 ◽  
Author(s):  
Zhi Jin ◽  
Xiaodong Yan ◽  
Yunhua Yu ◽  
Guangjie Zhao
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
Surface Area ◽  
Carbon Fibers ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Activated Carbon Fibers ◽  
Micropore Surface Area ◽  
Liquefied Wood

The combination of the high micropore surface area and the controlled mesopore size and mesopore/micropore ratio is responsible for high specific capacitance and excellent rate capability.

scholarly journals Facile fabrication of hierarchical porous carbon for a high-performance electrochemical capacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46329-46335 ◽  
Author(s):  
Guixiang Du ◽  
Qiuxiao Bian ◽  
Jingbo Zhang ◽  
Xinhui Yang
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
Electrochemical Capacitor ◽  
High Specific Capacitance ◽  
Cycling Performance ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Facile Fabrication ◽  
Rapid Pyrolysis

A facile and rapid pyrolysis method is developed for the synthesis of 3D hierarchical porous carbon, which exhibits a high specific capacitance, good rate capability and good cycling performance.

scholarly journals Dissected carbon nanotubes functionalized by 1-hydroxyanthraquinone for high-performance asymmetric supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48341-48353 ◽  
Author(s):  
Xia Yang ◽  
Yuying Yang ◽  
Quancai Zhang ◽  
Xiaotong Wang ◽  
Yufeng An ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Covalent Modification ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene

1-Hydroxyanthraquinone (HAQ) is selected to functionalize the dissected carbon nanotubes (rDCNTs) with reduced graphene oxide layers through non-covalent modification. The composite achieves high specific capacitance and ultrahigh rate capability.

Preparation of lignite-based activated carbon with high specific capacitance for electrochemical capacitors

2015 ◽  
Vol 08 (04) ◽  
pp. 1550031 ◽  
Author(s):  
Baolin Xing ◽  
Jianliang Cao ◽  
Yan Wang ◽  
Guiyun Yi ◽  
Chuanxiang Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electron Microscope ◽  
Specific Capacitance ◽  
Current Density ◽  
Electrode Materials ◽  
High Current Density ◽  
Electrochemical Capacitors ◽  
High Specific Capacitance ◽  
High Current ◽  
Charge Discharge

A lignite-based activated carbon (LAC) for electrochemical capacitors (ECs) was prepared from high moisture lignite by KOH activation, and the as-prepared sample was characterized by the N 2-sorption, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) techniques. The electrochemical performances of ECs with activated carbon as electrodes in 3 M KOH aqueous solution were evaluated by constant current charge-discharge and cyclic voltammetry. The LAC exhibits a well-developed surface area of 2581 m2/g, a relative wide pore size distribution of 0.5–10 nm. The ECs with LAC as electrode materials presents a high specific capacitance of 392 F/g at a low current density of 50 mA/g, and still remains 315 F/g even at a high current density of 5 A/g. The residual specific capacitance is as high as 92.9% after 2000 cycles. Compared with the commercial activated carbon (Maxsorb: Commercial product, Kansai, Japan), the LAC based electrode materials shows superior capacitive performance in terms of specific capacitance and charge–discharge performance at the high current density.

Homogeneous Growth of Ni(OH)2 Nanoparticle on Graphene Nanosheet for High-Performance Supercapacitor Electrode Material

2016 ◽  
Vol 852 ◽  
pp. 921-927 ◽  
Author(s):  
Huan Lin ◽  
Dong Lin Zhao ◽  
Ran Ran Yao ◽  
Zhao Hui Qiang ◽  
Wan Xin Zhang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Chemical Precipitation ◽  
High Energy ◽  
High Rate ◽  
Supercapacitor Electrode ◽  
Graphene Nanosheet

A homogeneous Ni (OH)2/graphene nanosheet (GNS) nanocomposite with excellent supercapacitive performance has been synthesized by a facile chemical precipitation. The Ni (OH)2/GNS nanocomposite presented an ideal morphology with the nanosized Ni (OH)2 particles homogeneously growing on the GNS. Its microstructure, morphology were investigated by XRD, SEM and TEM. The electrochemical performance of the Ni (OH)2/GNS nanocomposite was test by cyclic voltammetry, galvanostatic charge−discharge and electrochemical impedance spectroscopy techniques. The homogeneous Ni (OH)2/GNS nanocomposite exhibited a high specific capacitance of 1667 F/g at a current density of 1A/g and maintained a good stability in 5000 cycles, suggesting that it can be a promising candidate for supercapacitor. The high specific capacitance and remarkable rate capability are promising for applications in supercapacitors with both high energy and power densities. The Ni (OH)2/GNS nanocomposite exhibited large specific capacitance, high rate capability and good cycling stability.

Facile synthesis of a metal–organic framework-derived Mn2O3 nanowire coated three-dimensional graphene network for high-performance free-standing supercapacitor electrodes

2016 ◽  
Vol 4 (21) ◽  
pp. 8283-8290 ◽  
Author(s):  
Dong Ji ◽  
Hu Zhou ◽  
Jian Zhang ◽  
Yuanyuan Dan ◽  
Hongxun Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Free Standing ◽  
Metal Organic ◽  
Oxide Composites ◽  
First Time ◽  
Good Rate Capability

3DGN and MOF-derived metal oxide composites as free-standing electrodes for supercapacitors have been reported for the first time which exhibit a high specific capacitance, good rate capability and excellent long cycle stability.

Facile synthesis of γ-MnO2/rice husk-based-activated carbon and its electrochemical properties

2017 ◽  
Vol 10 (05) ◽  
pp. 1750057 ◽  
Author(s):  
Xiaolan Song ◽  
Hailong Duan ◽  
Ying Zhang ◽  
Haibo Wang ◽  
Hongyun Cao
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
Low Cost ◽  
Chemical Deposition ◽  
Electrochemical Capacitor ◽  
High Specific Capacitance ◽  
Charge Transfer Resistance ◽  
Electrochemical Performances ◽  
Equivalent Series Resistance ◽  
Transfer Resistance

In this study, composite [Formula: see text]-MnO2/activated carbon (AC) was prepared by chemical deposition method, and then it was assembled into electrode and electrochemical capacitor. Effects of reaction temperature and MnO2 content were studied. Materials were characterized by X-ray diffraction, scanning electron microscope and electrochemical test. MnO2 prepared at 30[Formula: see text]C was amorphous, and it displayed the high specific capacitance as nearly four times as MnO2 at 80[Formula: see text]C. Due to MnO2 particles which would block carbon pores when its content was too high, the composite containing 30% of MnO2 exhibited the largest specific capacitance of 278.3[Formula: see text]F/g at 0.2[Formula: see text]A/g in K2SO4 electrolyte. The equivalent series resistance and charge transfer resistance of material were only 1.35[Formula: see text][Formula: see text] and 1.41[Formula: see text][Formula: see text], respectively. After 1000 cycles, the capacitance retention was still 91.6%. It indicated that chemical deposition was a facile, low cost and effective method to prepare MnO2/AC with good electrochemical performances.

Yolk–shell-structured MnO2 microspheres with oxygen vacancies for high-performance supercapacitors

2018 ◽  
Vol 6 (4) ◽  
pp. 1601-1611 ◽  
Author(s):  
Yongsheng Fu ◽  
Xiangyu Gao ◽  
Daosong Zha ◽  
Junwu Zhu ◽  
Xiaoping Ouyang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
Oxygen Vacancies ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Excellent Cycling Stability

An electrode consisting of yolk–shell-structured MnO2 microspheres with oxygen vacancies exhibits high specific capacitance, excellent cycling stability (10 000 cycles) and superior rate capability.

Sign in / Sign up

Export Citation Format

Share Document