High-strength graphene composite films by molecular level couplings for flexible supercapacitors with high volumetric capacitance

2017 ◽  
Vol 5 (29) ◽  
pp. 15008-15016 ◽  
Author(s):  
Jun Cao ◽  
Chen Chen ◽  
Kena Chen ◽  
Qiongqiong Lu ◽  
Qingrong Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Reduced Graphene Oxide ◽  
Molecular Level ◽  
Composite Films ◽  
High Strength ◽  
Flexible Supercapacitor ◽  
Graphene Composite ◽  
Reduced Graphene ◽  
Volumetric Capacitance

A strategy to prepare freestanding reduced graphene oxide@polyvinyl alcohol composite films was developed. After introducing H2SO4, they can serve as flexible supercapacitor electrodes with high volumetric capacitance.

Achieving ultrahigh volumetric performance of graphene composite films by an outer–inner dual space utilizing strategy

2020 ◽  
Vol 8 (19) ◽  
pp. 9661-9669 ◽  
Author(s):  
Cong Huang ◽  
Qunli Tang ◽  
Qiushui Feng ◽  
Yanhua Li ◽  
Yali Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Composite Film ◽  
Reduced Graphene Oxide ◽  
Dual Space ◽  
Composite Films ◽  
Oxide Composite ◽  
Graphene Composite ◽  
Reduced Graphene

An outer–inner dual space utilizing strategy is reported for the fabrication of an ultrahigh volumetric performance polydopamine-coated dopamine/reduced graphene oxide composite film.

scholarly journals Contribution of reduced graphene oxidetohemicelluloses-basedfilms with enhanced mechanical and conductivity properties

2021 ◽  
Author(s):  
Yule Wu ◽  
Jun Rao ◽  
Feng Peng ◽  
Liping Zhang ◽  
Hui Gao ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Low Cost ◽  
Composite Films ◽  
High Strength ◽  
Flexible Electrode ◽  
Structures And Properties ◽  
Reduced Graphene

Abstract Aquaternized hemicellulose (QH)/chitosan/reduced graphene oxide (rGO) composite film with good mechanical propertyand electrical conductivity was prepared bysolution-casting method. The effects of reduced graphene oxide contents on the structures and properties of the composite films were investigated.The mechanical property and electrical conductivity of the film with rGO containing 0.5 wt.% was reached 102.09 MPa and 12.8 × 10− 2 S/cm, respectively.Under the functions of hydrogen bonds and Van Der Waals forces, three components were combined to obtain QH/CS/rGO composite films with higher thermal stability and conductivity. Due to the compositing of rGO, the composite films showed good UV-blocking properties.This work provided a low-cost and sustainable pathway for the application of high-strength hemicellulose composite films with electrical conductivity and UV resistance in flexible electrode materials.

All-porous heterostructure of reduced graphene oxide–polypyrrole–nanoporous gold for a planar flexible supercapacitor showing outstanding volumetric capacitance and energy density

2018 ◽  
Vol 6 (45) ◽  
pp. 22858-22869 ◽  
Author(s):  
Taniya Purkait ◽  
Guneet Singh ◽  
Navpreet Kamboj ◽  
Manisha Das ◽  
Ramendra Sundar Dey
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Nanoporous Gold ◽  
Flexible Supercapacitor ◽  
Reduced Graphene ◽  
Volumetric Capacitance ◽  
Porous Morphology

We propose a new prototype of flexible planar supercapacitor with highly conductive all-porous morphology of all the electroactive layers that shows outstanding volumetric stack capacitance (245.34 F cm−3) and energy density (98.48 mW h cm−3).

scholarly journals The Role of Bio-Extracted Reduced Graphene Oxide in the Crystallization Kinetics of Chitosan Bio-Polymer

2021 ◽  
pp. 1-4
Author(s):  
Solomon L Joseph ◽  
◽  
Agumba O John ◽  
Fanuel M Keheze ◽  
◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Nanomaterials ◽  
High Strength ◽  
Limiting Factor ◽  
Reduced Graphene ◽  
Electrical Conductivities ◽  
Coating Method ◽  
Potential Applications ◽  
New Applications

Carbon nanomaterials have recently attracted wide scientific applications due to their tunable properties. These novel materials act as best fillers that can provide substantial benefits due to their high strength, thermal conductivity, and electrical conductivities. With their huge applications as bulk materials, when implemented in polymer matrix as fillers, they give rise to new promising materials with which their properties can be tuned to suit a particular application. Besides the development of these new nanocomposite materials, there exist some challenges which must be fully surpassed to explore the potentiality of application of carbon-based nanocomposites. Reduced graphene oxide is one of the carbon derivatives which has attracted the current advancement in technology, and recently, it found its new applications in super capacitors used in electronic industries. The limiting factor for its exploration is the affordability. New and affordable sources of these graphene-based nanomaterial have to be devised, for fully realization of their potential applications. In this study, reduced graphene oxide and the bio-polymer chitosan were extracted from the locally available bio waste materials. Nanocomposites were prepared at 50% rGO: chitosan ratio. The films were then prepared by spin coating method. Prepared films were subjected to morphological analysis. From the results, it was observed that rGO induced chitosan crystallization, which led to formation of dendritic structures. Cellulose nanocrystals have thus displayed temperature dependent positive uniaxial birefringence

Large-Area Reduced Graphene Oxide Composite Films for Flexible Asymmetric Sandwich and Microsized Supercapacitors

2018 ◽  
Vol 28 (18) ◽  
pp. 1707247 ◽  
Author(s):  
Xinyu Wang ◽  
Fang Wan ◽  
Linlin Zhang ◽  
Zifang Zhao ◽  
Zhiqiang Niu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Composite Films ◽  
Large Area ◽  
Oxide Composite ◽  
Reduced Graphene
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