Fabrication of ultra-high energy and power asymmetric supercapacitors based on hybrid 2D MoS2/graphene oxide composite electrodes: a binder-free approach

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43261-43271 ◽  
Author(s):  
Umakant M. Patil ◽  
Min Sik Nam ◽  
Seokwon Kang ◽  
Ji Soo Sohn ◽  
Heung Bo Sim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
2D Materials ◽  
High Energy ◽  
Energy Storage Materials ◽  
Two Dimensional ◽  
Composite Electrodes ◽  
Ultra High Energy ◽  
Asymmetric Supercapacitors ◽  
Binder Free

Two-dimensional (2D) materials, graphene oxide (GO) and layered molybdenum disulfide (MoS2) nanosheets composite have been potentially investigated as novel energy storage materials due to their unique physicochemical properties.

Two-dimensional heterostructures of V2O5 and reduced graphene oxide as electrodes for high energy density asymmetric supercapacitors

2014 ◽  
Vol 2 (40) ◽  
pp. 17146-17152 ◽  
Author(s):  
D. H. Nagaraju ◽  
Qingxiao Wang ◽  
P. Beaujuge ◽  
H. N. Alshareef
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
High Energy ◽  
High Conductivity ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Two Dimensional ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene

The 2D layered heterostructures of V2O5 nanosheets and reduced graphene oxide show high conductivity and superior asymmetric supercapacitor properties.

scholarly journals Ultra-High Energy Density Hybrid Supercapacitors Using MnO2/Reduced Graphene Oxide Hybrid Nanoscrolls

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 2049 ◽  
Author(s):  
Janardhanan. R. Rani ◽  
Ranjith Thangavel ◽  
Minjae Kim ◽  
Yun Sung Lee ◽  
Jae-Hyung Jang
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Energy Density ◽  
Storage Systems ◽  
High Energy ◽  
High Energy Density ◽  
Ultra High Energy ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Reduced Graphene

Manganese oxide (MnO2) is a promising material for supercapacitor applications, with a theoretical ultra-high energy density of 308 Wh/kg. However, such ultra-high energy density has not been achieved experimentally in MnO2-based supercapacitors because of several practical issues, such as low electrical conductivity of MnO2, incomplete utilization of MnO2, and dissolution of MnO2. The present study investigates the potential of MnO2/reduced graphene oxide (rGO) hybrid nanoscroll (GMS) structures as electrode material for overcoming the difficulties and for developing ultra-high-energy storage systems. A hybrid supercapacitor, comprising MnO2/rGO nanoscrolls as anode material and activated carbon (AC) as a cathode, is fabricated. The GMS/AC hybrid supercapacitor exhibited enhanced energy density, superior rate performance, and promising Li storage capability that bridged the energy–density gap between conventional Li-ion batteries (LIBs) and supercapacitors. The fabricated GMS/AC hybrid supercapacitor demonstrates an ultra-high lithium discharge capacity of 2040 mAh/g. The GMS/AC cell delivered a maximum energy density of 105.3 Wh/kg and a corresponding power density of 308.1 W/kg. It also delivered an energy density of 42.77 Wh/kg at a power density as high as 30,800 W/kg. Our GMS/AC cell’s energy density values are very high compared with those of other reported values of graphene-based hybrid structures. The GMS structures offer significant potential as an electrode material for energy-storage systems and can also enhance the performance of the other electrode materials for LIBs and hybrid supercapacitors.

Recent Advances and Need of Green Synthesis in Two-Dimensional Materials for Energy Conversion and Storage Applications

2021 ◽  
Vol 16 ◽  
Author(s):  
Joice Sophia Ponraj ◽  
Muniraj Vignesh Narayanan ◽  
Ranjith Kumar Dharman ◽  
Valanarasu Santiyagu ◽  
Ramalingam Gopal ◽  
...  
Keyword(s):  
Energy Storage ◽  
Green Synthesis ◽  
2D Materials ◽  
Synthesis Method ◽  
Energy Storage And Conversion ◽  
Two Dimensional ◽  
Severe Problem ◽  
Energy Conversion And Storage ◽  
Energy Application ◽  
The Impact

: Increasing energy crisis across the globe requires immediate solutions. Two-dimensional (2D) materials are in great significance because of its application in energy storage and conversion devices but the production process significantly impacts the environment thereby posing a severe problem in the field of pollution control. Green synthesis method provides an eminent way of reduction in pollutants. This article reviews the importance of green synthesis in the energy application sector. The focus of 2D materials like graphene, MoS2, VS2 in energy storage and conversion devices are emphasized based on supporting recent reports. The emerging Li-ion batteries are widely reviewed along with their promising alternatives like Zn, Na, Mg batteries and are featured in detail. The impact of green methods in the energy application field are outlined. Moreover, future outlook in the energy sector is envisioned by proposing an increase in 2D elemental materials research.

scholarly journals A SnO2QDs/GO/PPY ternary composite film as positive and graphene oxide/charcoal as negative electrodes assembled solid state asymmetric supercapacitor for high energy storage applications

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 27801-27811
Author(s):  
M. Vandana ◽  
Y. S. Nagaraju ◽  
H. Ganesh ◽  
S. Veeresh ◽  
H. Vijeth ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Solid State ◽  
Composite Film ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Ternary Composite ◽  
Negative Electrodes ◽  
Energy Storage Applications ◽  
High Energy Storage

Representation of the synthesis steps of SnO2QDs/GO/PPY ternary composites and SnO2QDs/GO/PPY//GO/charcoal asymmetric supercapacitor device.

Modulating 2D Heterointerface with g-C3N4 Meshes: A Suitable Hetero-Layered Architecture for High-Power and Long-Life Energy Storage

2021 ◽  
Author(s):  
Yunping Wu ◽  
Wei Wei ◽  
Tianyi Ding ◽  
Sheng Chen ◽  
Rui Zhai ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Power ◽  
2D Materials ◽  
Two Dimensional ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Efficient Energy ◽  
Layered Architecture ◽  
The Common ◽  
Long Life

Two-dimensional (2D) heterostructures combine the advantageous features of different 2D materials and represent advanced electrode architectures for development of efficient energy storage devices. However, the common 2D heterostructures made by...

scholarly journals Liquid Phase Synthesis of CoP Nanoparticles with High Electrical Conductivity for Advanced Energy Storage

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Guo-Qun Zhang ◽  
Bo Li ◽  
Mao-Cheng Liu ◽  
Shang-Ke Yuan ◽  
Leng-Yuan Niu
Keyword(s):  
Electrical Conductivity ◽  
Energy Storage ◽  
Liquid Phase ◽  
Specific Capacitance ◽  
Current Density ◽  
High Surface ◽  
High Surface Area ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Materials

Transition metal phosphide alloys possess the metalloid characteristics and superior electrical conductivity and are a kind of high electrical conductive pseudocapacitive materials. Herein, high electrical conductive cobalt phosphide alloys are fabricated through a liquid phase process and a nanoparticles structure with high surface area is obtained. The highest specific capacitance of 286 F g−1 is reached at a current density of 0.5 A g−1. 63.4% of the specific capacitance is retained when the current density increased 16 times and 98.5% of the specific capacitance is maintained after 5000 cycles. The AC//CoP asymmetric supercapacitor also shows a high energy density (21.3 Wh kg−1) and excellent stability (97.8% of the specific capacitance is retained after 5000 cycles). The study provides a new strategy for the construction of high-performance energy storage materials by enhancing their intrinsic electrical conductivity.

Graphene Composites

2019 ◽  
Vol 23 ◽  
pp. 57-63 ◽  
Author(s):  
Chin Wei Lai
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Polymer Composites ◽  
Applied Research ◽  
Scientific Literature ◽  
Filler Content ◽  
2D Materials ◽  
Industrial Applications ◽  
Research Interest ◽  
Two Dimensional

This chapter reviews recent development of graphene-based polymer composites. The formation of graphene oxide and graphene are a vital two dimensional (2D) material has received a lot of research interest in commercialization aspect due to its excellent electrical, thermal as well as mechanical properties at very low filler content. In this manner, utilization of graphene-based polymer composites with different polymer matrixes have been attracted increasing attention in recent years for both fundamental studies and applied research into industrial applications in many fields. Herein, novel properties of polymer (epoxy, polystyrene, and PANI) / graphene composites will be reviewed along with detailed examples drawn from the scientific literature. Keywords: Graphene-based polymer composites, thermo-mechanical properties, two dimensional (2D) materials

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