scholarly journals Natural sliced wood veneer as a universal porous lightweight substrate for supercapacitor electrode materials

RSC Advances ◽  
2017 ◽  
Vol 7 (86) ◽  
pp. 54806-54812 ◽  
Author(s):  
Shaoyi Lyu ◽  
Yanping Chen ◽  
Shenjie Han ◽  
Limin Guo ◽  
Na Yang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Wood Veneer ◽  
Active Materials ◽  
Supercapacitor Electrode Materials

We herein report the use of natural sliced wood veneer as a porous lightweight substrate for supercapacitor electrodes, where PANI/RGO and PPy/RGO were employed as active materials, and both wood electrodes showed good electrochemical performance.

Effect of dopant on the morphology and electrochemical performance of Ni1-xCaxCo2O4 (0 ≤ x ≤ 0.8) oxide hierarchical structures

MRS Advances ◽  
2020 ◽  
pp. 1-8
Author(s):  
D. Guragain ◽  
C. Zequine ◽  
R. Bhattarai ◽  
J. Choi ◽  
R. K. Gupta ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Energy Band ◽  
Electrode Materials ◽  
Morphological Structure ◽  
Hierarchical Structures ◽  
High Specific Capacitance ◽  
Supercapacitor Electrode ◽  
Binary Metal Oxides ◽  
Supercapacitor Electrode Materials

ABSTRACT The binary metal oxides are increasingly used as supercapacitor electrode materials in energy storing devices. Particularly NiCo2O4 has shown promising electrocapacitive performance with high specific capacitance and energy density. The electrocapacitive performance of these oxides largely depends on their morphology and electrical properties governed by their energy band-gaps and defects. The morphological structure of NiCo2O4 can be altered via the synthesis route, while the energy band-gap could be altered by doping. Also, doping can enhance crystal stability and bring in grain refinement, which can further improve the much-needed surface area for high specific capacitance. Given the above, this study evaluates the electrochemical performance of Ca-doped Ni1-xCaxCo2O4 (0 ≤ x ≤ 0.8) compounds. This stipulates promising applications for electrodes in future supercapacitors.

Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87077-87083 ◽  
Author(s):  
Fen Ran ◽  
Xuanxuan Zhang ◽  
Yuansen Liu ◽  
Kuiwen Shen ◽  
Xiaoqin Niu ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Cycle Life ◽  
Supercapacitor Electrode ◽  
Active Materials ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Hierarchical Porous ◽  
Long Life ◽  
Hollow Carbon ◽  
Supercapacitor Electrode Materials

Remarkable supercapacitor electrodes with a high specific supercapacitance and a super long cycle life were achieved by using hierarchical porous hollow carbon microcapsules (HPHCMs) as active materials.

Enhanced electrochemical performance of hybrid SnO2@MOx (M = Ni, Co, Mn) core–shell nanostructures grown on flexible carbon fibers as the supercapacitor electrode materials

2015 ◽  
Vol 3 (7) ◽  
pp. 3676-3682 ◽  
Author(s):  
Yang Liu ◽  
Yang Jiao ◽  
Bosi Yin ◽  
Siwen Zhang ◽  
Fengyu Qu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Carbon Fibers ◽  
High Performance ◽  
Electrode Materials ◽  
Core Shell ◽  
Carbon Cloth ◽  
Supercapacitor Electrode ◽  
Shell Nanostructures ◽  
Supercapacitor Electrode Materials ◽  
Enhanced Electrochemical Performance

In this paper, hierarchical SnO2@MOx (SnO2@NiO, SnO2@Co3O4, SnO2@MnO2) heterostructures grown on carbon cloth (CC) for high performance supercapacitors are fabricated by a two-step solution-based method.

Polyaniline Grafted Amino-Functionalized Graphene Nanocomposite with Excellent Electrochemical Performance for Supercapacitor Electrode Materials

2014 ◽  
Vol 789 ◽  
pp. 12-17
Author(s):  
Yu Liu ◽  
Xin Yan Su ◽  
Shan Yi Guang ◽  
Hong Yao Xu
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Oxidative Polymerization ◽  
Graphene Sheets ◽  
Functionalized Graphene ◽  
Supercapacitor Electrode ◽  
Sem Images ◽  
Excellent Electrochemical Performance ◽  
Vis Spectroscopy ◽  
Supercapacitor Electrode Materials

The amino-functionalized graphene/polyaniline nanocomposites (AGNS/PANI) were fabricated through in-situ chemical oxidative polymerization of aniline in the presence of amino-functionalized graphene sheets (AGNS). FTIR, UV-vis spectroscopy analyses revealed that aminophenyl groups covalently bound to the basal plane of graphene via a diazonium addition, and the polyaniline chains grafted to graphene sheets. The FE-SEM images show that PANI nanorods aligned vertically on the surface of graphene. The AGNS/PANI nanocomposite exhibits excellent electrochemical performance for supercapacitor electrode materials.

Synthesis of cobalt-doped nickel sulfide nanomaterials with rich edge sites as high-performance supercapacitor electrode materials

2018 ◽  
Vol 5 (5) ◽  
pp. 1218-1225 ◽  
Author(s):  
Shengli Xie ◽  
Jianxia Gou ◽  
Bin Liu ◽  
Chenguang Liu
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Nickel Sulfide ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Supercapacitor Application ◽  
Edge Site ◽  
Supercapacitor Electrode Materials

Edge site enrichment enhanced the electrochemical performance of Ni0.75Co0.25S2 for supercapacitor application.

Electrochemical Performance of Carbon/MnO2Nanocomposites Prepared via Molecular Bridging as Supercapacitor Electrode Materials

2015 ◽  
Vol 162 (5) ◽  
pp. A5179-A5184 ◽  
Author(s):  
C. Ramirez-Castro ◽  
O. Crosnier ◽  
L. Athouël ◽  
R. Retoux ◽  
D. Bélanger ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Supercapacitor Electrode Materials

High Performance Supercapacitor Electrode Materials Based on Activated Carbon and Conducting Polypyrrole

2015 ◽  
Vol 645-646 ◽  
pp. 1150-1155 ◽  
Author(s):  
Wen Tao Yuan ◽  
Ya Jie Yang ◽  
Yong Long Qiu ◽  
Jian Hua Xu ◽  
Wen Yao Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Synergistic Effect ◽  
Electrochemical Performance ◽  
High Performance ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Uniform Structure ◽  
Discharge Process ◽  
Supercapacitor Electrode ◽  
Supercapacitor Electrode Materials

The traditional supercapacitor is made of activated carbon, which shows lower specific capacity and higher resistance. In this paper, we demonstrated preparation of high performance supercapacitor electrode materials based on activated carbon and conducting polymer polypyrrole (ppy). In order to obtain well dispersion of ppy in activated carbon for lower resistance of electrode, a high-speed agate beads milling process was used to mix the ppy and porous carbon powder. By controlling the synergistic effect between ppy and activated carbon, a uniform structure composite electrode was prepared and the performance of this composite based supercapacitor was investigated. Compared with pure activated electrode, the obvious electrochemical performance improvement was achieved in composite electrode after the introduction of ppy. It has been found that electrode based on this composite has a maximum specific capacitance about 159 F/g, which was higher than pure activated carbon, and exhibited low resistance about 3.35 Ohm. The cycle performance results revealed that a 142 F/g (more than 88% of initial capacitance) capacitance was kept in composite electrode after 1000 cycles charge/discharge process. We conclude that the excellent synergistic effect between activated carbon and ppy resulted in superior electrochemical performance of composite electrode. Furthermore, the simple preparing method of composite electrode for supercapacitor assembly has potential commercial applications.

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