Fabrication and electrochemical properties of flexible transparent supercapacitor electrode materials based on cellulose nanofibrils and reduced graphene oxide

2019 ◽  
Vol 41 (3) ◽  
pp. 1135-1144
Author(s):  
Bo Wu ◽  
Wen He ◽  
Mengting Lu ◽  
Ze Li ◽  
Han Qiang
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Properties ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Cellulose Nanofibrils ◽  
Supercapacitor Electrode ◽  
Reduced Graphene ◽  
Supercapacitor Electrode Materials

Template-free single pot synthesis of SnS2@Cu2O/reduced graphene oxide (rGO) nanoflowers for high performance supercapacitors

2017 ◽  
Vol 41 (7) ◽  
pp. 2702-2716 ◽  
Author(s):  
Goutam Hatui ◽  
Ganesh Chandra Nayak ◽  
G. Udayabhanu ◽  
Yogendra Kumar Mishra ◽  
Devendra Deo Pathak
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Electrode Materials ◽  
Hydrothermal Route ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Reduced Graphene ◽  
Template Free ◽  
Supercapacitor Electrode Materials

A template-free one-pot hydrothermal route was adopted for the facile synthesis of SnS2@Cu2O/reduced graphene oxide (rGO) nanoflowers for supercapacitor electrode materials.

scholarly journals Fabrication and Performance of Self-Supported Flexible Cellulose Nanofibrils/Reduced Graphene Oxide Supercapacitor Electrode Materials

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2793 ◽  
Author(s):  
Wen He ◽  
Bo Wu ◽  
Mengting Lu ◽  
Ze Li ◽  
Han Qiang
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Retention Rate ◽  
Rapid Development ◽  
Cellulose Nanofibrils ◽  
Flexible Supercapacitors ◽  
Reduced Graphene

With the rapid development of portable and wearable electronic devices, self-supporting flexible supercapacitors have attracted much attention, and higher requirements have been put forward for the electrode of the device, that is, it is necessary to have good mechanical properties while satisfying excellent electrochemical performance. In this work, a facile method was invented to obtain excellent self-supported flexible electrode materials with high mechanical properties and outstanding electrochemical performance by combining cellulose nanofibrils (CNFs) and reduced graphene oxide (RGO). We focused on the effect of the ratio of the addition of CNFs and the formation process of the film on the electrochemical and mechanical properties. The results show that the CNFs/RGO12 (where the ratio of CNFs to GO is 1:2) film displayed outstanding comprehensive properties; its tensile strength and conductivity were up to 83 MPa and 202.94 S/m, respectively, and its CA value was as high as 146 mF cm−2 under the current density of 5 mA cm−2. Furthermore, the initial retention rate of the specific capacitance was about 83.7% when recycled 2000 times; moreover, its capacitance did not change much after perpendicular bending 200 times. Therefore, the films prepared by this study have great potential in the field of flexible supercapacitors.

scholarly journals Synthesis of Polypyrrole/Reduced Graphene Oxide Hybrids via Hydrothermal Treatment for Energy Storage Applications

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2273 ◽  
Author(s):  
Adam Moyseowicz ◽  
Krzysztof Pająk ◽  
Katarzyna Gajewska ◽  
Grażyna Gryglewicz
Keyword(s):  
Graphene Oxide ◽  
Chemical Composition ◽  
Electrochemical Properties ◽  
Reduced Graphene Oxide ◽  
Hydrothermal Treatment ◽  
Hybrid Materials ◽  
Electrode Materials ◽  
Conductive Polymer ◽  
Surface Areas ◽  
Reduced Graphene

Herein, we propose hydrothermal treatment as a facile and environmentally friendly approach for the synthesis of polypyrrole/reduced graphene oxide hybrids. A series of self-assembled hybrid materials with different component mass ratios of conductive polymer to graphene oxide was prepared. The morphology, porous structure, chemical composition and electrochemical performance of the synthesized hybrids as electrode materials for supercapacitors were investigated. Nitrogen sorption analysis at 77 K revealed significant changes in the textural development of the synthesized materials, presenting specific surface areas ranging from 25 to 199 m2 g−1. The combination of the pseudocapacitive polypyrrole and robust graphene material resulted in hybrids with excellent electrochemical properties, which achieved specific capacitances as high as 198 F g−1 at a current density of 20 A g−1 and retained up to 92% of their initial capacitance after 3000 charge–discharge cycles. We found that a suitable morphology and chemical composition are key factors that determine the electrochemical properties of polypyrrole/reduced graphene oxide hybrid materials.

Sulfur-doped porous reduced graphene oxide hollow nanosphere frameworks as metal-free electrocatalysts for oxygen reduction reaction and as supercapacitor electrode materials

Nanoscale ◽  
2014 ◽  
Vol 6 (22) ◽  
pp. 13740-13747 ◽  
Author(s):  
Xi'an Chen ◽  
Xiaohua Chen ◽  
Xin Xu ◽  
Zhi Yang ◽  
Zheng Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxygen Reduction Reaction ◽  
High Performance ◽  
Electrode Materials ◽  
Reduction Reaction ◽  
Hollow Nanosphere ◽  
Supercapacitor Electrode ◽  
Metal Free ◽  
Reduced Graphene ◽  
Supercapacitor Electrode Materials

3D S-PGHS frameworks are used as efficient metal-free electrocatalysts for ORR and as high performance supercapacitor electrode materials.

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