scholarly journals Epoxy-based/BaTiO3 nanodielectrics: Relaxation dynamics, charge transport and energy storage

2022 ◽  
Vol 145 ◽  
pp. 111537
Author(s):  
Stavros X. Drakopoulos ◽  
Anastasios C. Patsidis ◽  
Georgios C. Psarras
Keyword(s):  
Energy Storage ◽  
Charge Transport ◽  
Relaxation Dynamics

scholarly journals Resonance circuits for adiabatic circuits

2003 ◽  
Vol 1 ◽  
pp. 223-228
Author(s):  
C. Schlachta ◽  
M. Glesner
Keyword(s):  
Energy Storage ◽  
Power Consumption ◽  
Charge Transport ◽  
Cmos Circuits ◽  
Digital Cmos ◽  
Storage Element

Abstract. One of the possible techniques to reduces the power consumption in digital CMOS circuits is to slow down the charge transport. This slowdown can be achieved by introducing an inductor in the charging path. Additionally, the inductor can act as an energy storage element, conserving the energy that is normally dissipated during discharging. Together with the parasitic capacitances from the circuit a LCresonant circuit is formed.

Dipole-relaxation dynamics in a modified polythiourea with high dielectric constant for energy storage applications

2019 ◽  
Vol 115 (16) ◽  
pp. 163901 ◽  
Author(s):  
Chao Wu ◽  
Zongze Li ◽  
Gregory M. Treich ◽  
Mattewos Tefferi ◽  
Riccardo Casalini ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
High Dielectric Constant ◽  
Relaxation Dynamics ◽  
Dipole Relaxation ◽  
Energy Storage Applications ◽  
High Dielectric

Role of MXenes/Polyaniline Nanocomposites in Fabricating Innovative Supercapacitor Technology

2021 ◽  
pp. 30-53
Author(s):  
Dipanwita Majumdar
Keyword(s):  
Energy Storage ◽  
Charge Transport ◽  
Special Reference ◽  
Structural Properties ◽  
Scientific Community ◽  
High Performance ◽  
Storage Systems ◽  
Electronic Charge ◽  
Wearable Electronics

Versatile and exclusive electronic, optical, physicochemical, electrochemical and mechanical features of both conducting polymers and MXenes have stimulated global scientists to take serious impetuses in designing innovative high-performance energy storage systems with these materials, for resolving the growing needs for auto-powering mechanically flexible and wearable electronics for all essential technological fields. However, both the materials have experienced some serious practical limitations, which have driven the scientific community to look for necessary modifications in the form of MXenes/PANI nanocomposites with suitable compositions that would essentially restore their representative characteristics but successfully suppress their functional drawbacks concurrently and considerably. Accordingly, in the present overview, the different strategies of fabrication of MXenes/PANI nanocomposites for advanced supercapacitors with special reference to the necessary morphological modifications brought about by synthetic improvisations that resulted in superior capacitive, electronic charge transport as well as structural properties have also been recognized and compared. Such analysis would purposefully assist in adjusting the integral mechanical and electrochemical responses for scheming smarter and highly flexible microelectronics soon.

scholarly journals Carrier Transport and Molecular Displacement Modulated dc Electrical Breakdown of Polypropylene Nanocomposites

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1207 ◽  
Author(s):  
Daomin Min ◽  
Chenyu Yan ◽  
Rui Mi ◽  
Chao Ma ◽  
Yin Huang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Charge Transport ◽  
Carrier Mobility ◽  
Breakdown Strength ◽  
Electrical Breakdown ◽  
Dielectric Materials ◽  
Breakdown Field ◽  
Smart Power ◽  
Electrical Breakdown Strength ◽  
Effective Carrier

Dielectric energy storage capacitors have advantages such as ultra-high power density, extremely fast charge and discharge speed, long service lifespan and are significant for pulsed power system, smart power grid, and power electronics. Polypropylene (PP) is one of the most widely used dielectric materials for dielectric energy storage capacitors. It is of interest to investigate how to improve its electrical breakdown strength by nanodoping and the influencing mechanism of nanodoping on the electrical breakdown properties of polymer nanocomposites. PP/Al2O3 nanocomposite dielectric materials with various weight fraction of nanoparticles are fabricated by melt-blending and hot-pressing methods. Thermally stimulated current, surface potential decay, and dc electrical breakdown experiments show that deep trap properties and associated molecular chain motion are changed by incorporating nanofillers into polymer matrix, resulting in the variations in conductivity and dc electrical breakdown field of nanocomposite dielectrics. Then, a charge transport and molecular displacement modulated electrical breakdown model is utilized to simulate the dc electrical breakdown behavior. It is found that isolated interfacial regions formed in nanocomposite dielectrics at relatively low loadings reduce the effective carrier mobility and strengthen the interaction between molecular chains, hindering the transport of charges and the displacement of molecular chains with occupied deep traps. Accordingly, the electrical breakdown strength is enhanced at relatively low loadings. Interfacial regions may overlap in nanocomposite dielectrics at relatively high loadings so that the effective carrier mobility decreases and the interaction between molecular chains may be weakened. Consequently, the molecular motion is accelerated by electric force, leading to the decrease in electrical breakdown strength. The experiments and simulations reveals that the influence of nanodoping on dc electrical breakdown properties may origin from the changes in the charge transport and molecular displacement characteristics caused by interfacial regions in nanocomposite dielectrics.

Charge-transport anisotropy in black phosphorus: critical dependence on the number of layers

2016 ◽  
Vol 18 (24) ◽  
pp. 16345-16352 ◽  
Author(s):  
Swastika Banerjee ◽  
Swapan K. Pati
Keyword(s):  
Charge Transport ◽  
Carrier Transport ◽  
2D Materials ◽  
Black Phosphorus ◽  
Relaxation Dynamics ◽  
Scattering Process ◽  
Number Of Layers

Tri-layer black phosphorus exhibits unique carrier-transport features. Two descriptors have been proposed to analyze the scattering process of electrons and holes and their recombination as well as relaxation dynamics in black phosphorus. This approach is general enough to be applied for the assessment of transport-anisotropy in any 2D (or quasi-2D) materials as well as the critical dependence on the number of layers.

A supramolecular approach for the synthesis of cross-linked ionic polyacetylene network gels

2020 ◽  
Vol 4 (2) ◽  
pp. 645-650
Author(s):  
Yong Tian ◽  
Lingwei Kong ◽  
Huiling Mao ◽  
Jianbing Shi ◽  
Bin Tong ◽  
...  
Keyword(s):  
Energy Storage ◽  
Charge Transport ◽  
Storage Device ◽  
Energy Storage Device ◽  
Ordered Structure

We present a facile approach to prepare π-conjugated ionic polyacetylene gel. IPN-1A with a highly ordered structure facilitated the charge transport and can be used to fabricate a flexible energy-storage device to light miniature bulbs.

Charge Transport in Energy Storage and Conversion Devices

2018 ◽  
Vol 19 ◽  
pp. 1-17
Author(s):  
Volker Döge ◽  
Árpád W. Imre
Keyword(s):  
Energy Storage ◽  
Charge Transport ◽  
Specific Energy ◽  
High Power ◽  
Lithium Ion ◽  
High Energy ◽  
Transport Processes ◽  
Power Load ◽  
Power Capability ◽  
Electrical Loss

Charge transport is one of the most important phenomena, which directly influences the performance of the energy storage and conversation devices. In this work, the authors provide an overview of various rechargeable energy storage battery chemistries and designs, and discuss the charge transport processes related to power capability of the lithium-ion technology. The load distribution by parallel connection of high power batteries or supercapacitor and high-energy cells is discussed and general conclusions are provided. Thus, the reduced peak power load on the high-energy cells are approved by simulation and experiment in passive parallel circuitry of high power and a high energy lithium-ion cells. The definition and advantages of the earlier deduced electrical loss time are explained. It is shown, that at a constant C-rate, defined as the ratio of the applied current and the rated cell capacity in Ah, the electrical loss time has a direct linear correlation to efficiency, and that the electrical loss time allows a direct power capability comparison of various battery cell chemistries and systems. The power capability, specific energy, and energy density of the industry relevant Li-ion battery cells based on electrical loss time approach are summarized and the following conclusions made. Today prismatic cells reach the maximum specific energy of small cylindrical cells, at the same time showing a little bit better power capability, than the investigated high energy cylindrical cells.

scholarly journals Small Polaron Hopping in Fe:LiNbO3 as a Function of Temperature and Composition

Crystals ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 294 ◽  
Author(s):  
Laura Vittadello ◽  
Marco Bazzan ◽  
Simon Messerschmidt ◽  
Mirco Imlau
Keyword(s):  
Charge Transport ◽  
Transient Absorption ◽  
Small Polaron ◽  
Transient Absorption Spectroscopy ◽  
Relaxation Dynamics ◽  
Experimental Conditions ◽  
Polaron Hopping ◽  
Small Polaron Hopping ◽  
Wide Range ◽  
Temperature Ranges

Small-polaron hopping involved in charge transport in Fe-doped congruent lithium niobate is investigated as a function of temperature and composition by means of light-induced transient absorption spectroscopy. The relaxation dynamics of the light-induced polaron population is characterized by individual activation energies within different temperature ranges. A numerical investigation carried out by Monte Carlo simulations reveals that these findings may be understood in terms of the varying abundance of the different types of hops that the polarons may perform among regular or defective lattice sites. The role of the temperature and of the sample composition on the distribution of the different hop types is thus explored for a wide range of parameters, allowing one to preview the charge transport properties for a given set of experimental conditions.

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