The role of defects and dimensionality in influencing the charge, capacitance, and energy storage of graphene and 2D materials

2017 ◽  
Vol 6 (5) ◽  
pp. 421-433 ◽  
Author(s):  
Prabhakar R. Bandaru ◽  
Hidenori Yamada ◽  
Rajaram Narayanan ◽  
Mark Hoefer
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Charge Density ◽  
Space Charge ◽  
Surface Area ◽  
2D Materials ◽  
Two Dimensional ◽  
Charge Capacitance

AbstractThe inevitable presence of defects in graphene and other two-dimensional (2D) materials influences the charge density and distribution along with the concomitant measured capacitance and the related energy density. We review, in this paper, the various manifestations of the capacitance including both the classical electrostatic (e.g. associated with double layer, space charge, chemical capacitances) and the quantum forms, as well as a few methodologies to tune the respective capacitances. The role of a proper determination of the surface area of 2D materials, considering the presence of defects, in determining the capacitance and the magnitude of the energy storage is also considered.

Co-planar two-dimensional Metal-Insulator-Semiconductor Capacitor: Numerical study of the device electrostatics.

2017 ◽  
Author(s):  
Varun Bheemireddy
Keyword(s):  
Space Charge ◽  
High Performance ◽  
Numerical Study ◽  
2D Materials ◽  
Space Charge Density ◽  
Two Dimensional ◽  
Short Channel ◽  
Metal Insulator ◽  
Metal Insulator Semiconductor ◽  
New Family

The two-dimensional(2D) materials are highly promising candidates to realise elegant and e cient transistor. In the present letter, we conjecture a novel co-planar metal-insulator-semiconductor(MIS) device(capacitor) completely based on lateral 2D materials architecture and perform numerical study of the capacitor with a particular emphasis on its di erences with the conventional 3D MIS electrostatics. The space-charge density features a long charge-tail extending into the bulk of the semiconductor as opposed to the rapid decay in 3D capacitor. Equivalently, total space-charge and semiconductor capacitance densities are atleast an order of magnitude more in 2D semiconductor. In contrast to the bulk capacitor, expansion of maximum depletion width in 2D semiconductor is observed with increasing doping concentration due to lower electrostatic screening. The heuristic approach of performance analysis(2D vs 3D) for digital-logic transistor suggest higher ON-OFF current ratio in the long-channel limit even without third dimension and considerable room to maximise the performance of short-channel transistor. The present results could potentially trigger the exploration of new family of co-planar at transistors that could play a signi significant role in the future low-power and/or high performance electronics.<br>

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.

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 Controlled Two-Dimensional Ferromagnetism in 1T–CrTe2: The Role of Charge Density Wave and Strain

2020 ◽  
Vol 124 (38) ◽  
pp. 21047-21053 ◽  
Author(s):  
Adolfo Otero Fumega ◽  
Jan Phillips ◽  
Victor Pardo
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Two Dimensional

Ultrathin mesoporous F-doped α-Ni(OH)2 nanosheets as an efficient electrode material for water splitting and supercapacitors

2019 ◽  
Vol 7 (16) ◽  
pp. 9656-9664 ◽  
Author(s):  
Nadeem Hussain ◽  
Wenjuan Yang ◽  
Jianmin Dou ◽  
Yanan Chen ◽  
Yitai Qian ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Surface ◽  
Surface Area ◽  
Water Splitting ◽  
Specific Surface Area ◽  
Electrode Material ◽  
Storage Systems ◽  
High Specific Surface Area ◽  
Two Dimensional ◽  
2D Nanomaterials

Two-dimensional (2D) nanomaterials with a high specific surface area and mesoporous nature are attractive and have wide applications in catalysis, energy storage systems, etc.

Chromatographic Charge Density Determination of Materials with Low Surface Area

Langmuir ◽  
1994 ◽  
Vol 10 (3) ◽  
pp. 855-860 ◽  
Author(s):  
Christa S. Buergisser ◽  
Andre M. Scheidegger ◽  
Michal Borkovec ◽  
Hans Sticher
Keyword(s):  
Charge Density ◽  
Surface Area ◽  
Density Determination

Role of Surface Structure on Li-Ion Energy Storage Capacity of Two-Dimensional Transition-Metal Carbides

2014 ◽  
Vol 136 (17) ◽  
pp. 6385-6394 ◽  
Author(s):  
Yu Xie ◽  
Michael Naguib ◽  
Vadym N. Mochalin ◽  
Michel W. Barsoum ◽  
Yury Gogotsi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Transition Metal ◽  
Storage Capacity ◽  
Two Dimensional ◽  
Metal Carbides ◽  
Ion Energy ◽  
Transition Metal Carbides ◽  
Energy Storage Capacity ◽  
Li Ion
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