Electrodeposition of polyaniline on three-dimensional graphene hydrogel as a binder-free supercapacitor electrode with high power and energy densities

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 58854-58861 ◽  
Author(s):  
Shuya Gao ◽  
Li Zhang ◽  
Yadong Qiao ◽  
Pei Dong ◽  
Jun Shi ◽  
...  
Keyword(s):  
High Power ◽  
Three Dimensional ◽  
High Energy ◽  
Supercapacitor Electrode ◽  
3D Graphene ◽  
Binder Free ◽  
Power And Energy ◽  
Power Densities

3D graphene hydrogel (GH) provides a promising support for electrodepositing PANI, and the supercapacitor based on GH/PANI conformal heterostructure displays high energy and power densities.

Highly conductive three-dimensional MnO2–carbon nanotube–graphene–Ni hybrid foam as a binder-free supercapacitor electrode

Nanoscale ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 1079-1085 ◽  
Author(s):  
Guoyin Zhu ◽  
Zhi He ◽  
Jun Chen ◽  
Jin Zhao ◽  
Xiaomiao Feng ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Three Dimensional ◽  
Supercapacitor Electrode ◽  
Binder Free ◽  
Hybrid Foam

Realizing both High Energy and High Power Densities by Twisting Three Carbon-Nanotube-Based Hybrid Fibers

2015 ◽  
Vol 127 (38) ◽  
pp. 11329-11334 ◽  
Author(s):  
Ye Zhang ◽  
Yang Zhao ◽  
Xunliang Cheng ◽  
Wei Weng ◽  
Jing Ren ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Power ◽  
High Energy ◽  
Hybrid Fibers ◽  
Power Densities

Three-Dimensional Graphene/MnO2 Nanowalls Hybrid for High-Efficiency Electrochemical Supercapacitors

NANO ◽  
2018 ◽  
Vol 13 (01) ◽  
pp. 1850013 ◽  
Author(s):  
Chuanyin Xiong ◽  
Tiehu Li ◽  
Tingkai Zhao ◽  
Alei Dang ◽  
Xianglin Ji ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Specific Capacitance ◽  
High Efficiency ◽  
Hydrogen Reduction ◽  
Three Dimensional ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
3D Graphene

In this paper, a facile method is designed to fabricate three-dimensional (3D) graphene (GR)/manganese dioxide (MnO2) nanowall electrode material. The 3D GR/MnO2 hybrid is prepared by a combination of electrochemical deposition (ELD) and electrophoresis deposition (EPD), followed by thermal reduction (TR). Firstly, the 3D graphene oxide (GO)/MnO2 hybrid is obtained by the ELD–EPD method. Secondly, the 3D GR/MnO2 hybrid is obtained through hydrogen reduction at a certain temperature. The as-fabricated hybrid has been characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman spectroscopy. The electrochemical properties have been also measured by cyclic voltammetry. The results showed that the 3D GR/MnO2 nanowalls hybrid has a high specific capacitance of 266.75[Formula: see text]Fg[Formula: see text] and a high energy density of 25.36[Formula: see text]Whkg[Formula: see text]. Moreover, a high specific capacitance (240.15[Formula: see text]Fg[Formula: see text]) at a high scan rate of 200[Formula: see text]mVs[Formula: see text] (90% capacity retention) has been also obtained. Additionally, the hybrid can serve directly as the electrodes of supercapacitor without adding binder. This work provides a novel road to fabricate a binder-free 3D GR-based hybrid for high-performance energy storage devices.

A high-performance asymmetric supercapacitor electrode based on a three-dimensional ZnMoO4/CoO nanohybrid on nickel foam

Nanoscale ◽  
2019 ◽  
Vol 11 (28) ◽  
pp. 13639-13649 ◽  
Author(s):  
Pengxi Li ◽  
Chaohui Ruan ◽  
Jing Xu ◽  
Yibing Xie
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Nickel Foam ◽  
Three Dimensional ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Supercapacitor Electrode ◽  
Storage Performance ◽  
High Energy Storage

A three-dimensional criss-crossed ZnMoO4/CoO nanohybrid was synthesized to deliver high energy storage performance.

Advanced asymmetric supercapacitors based on CNT@Ni(OH)2 core–shell composites and 3D graphene networks

2015 ◽  
Vol 3 (38) ◽  
pp. 19545-19555 ◽  
Author(s):  
Huan Yi ◽  
Huanwen Wang ◽  
Yuting Jing ◽  
Tianquan Peng ◽  
Yiran Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Nickel Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
High Power Density ◽  
Asymmetric Supercapacitors ◽  
3D Graphene

Asymmetric supercapacitors with CNT@nickel hydroxide nanosheet composites and 3-D graphene networks demonstrated a high energy density (∼44.0 W h kg−1) and high power density (∼16 kW kg−1) in aqueous KOH electrolyte.

scholarly journals Lightweight, interconnected VO2 nanoflowers hydrothermally grown on 3D graphene networks for wide-voltage-window supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35558-35564 ◽  
Author(s):  
Junya Wang ◽  
Xuetao Zhang ◽  
Yue Zhang ◽  
Asim Abas ◽  
Xiaohua Zhao ◽  
...  
Keyword(s):  
Three Dimensional ◽  
High Conductivity ◽  
Supercapacitor Electrode ◽  
3D Graphene

Highly stable and interconnected VO2 nanoflowers were uniformly grown on flexible three dimensional graphene networks, which directly served as a lightweight and high conductivity supercapacitor electrode (VO2 NF@3DG).

scholarly journals Carbon-coated fluorinated graphite for high energy and high power densities primary lithium batteries

2010 ◽  
Vol 195 (9) ◽  
pp. 2914-2917 ◽  
Author(s):  
Q. Zhang ◽  
S. D’Astorg ◽  
P. Xiao ◽  
X. Zhang ◽  
L. Lu
Keyword(s):  
High Power ◽  
Lithium Batteries ◽  
High Energy ◽  
Fluorinated Graphite ◽  
Carbon Coated ◽  
Power Densities

scholarly journals Beyond Activated Carbon: Graphite‐Cathode‐Derived Li‐Ion Pseudocapacitors with High Energy and High Power Densities

2019 ◽  
Vol 31 (14) ◽  
pp. 1807712 ◽  
Author(s):  
Gang Wang ◽  
Steffen Oswald ◽  
Markus Löffler ◽  
Klaus Müllen ◽  
Xinliang Feng
Keyword(s):  
Activated Carbon ◽  
High Power ◽  
High Energy ◽  
Graphite Cathode ◽  
Li Ion ◽  
Power Densities
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