High field tunneling as a limiting factor of maximum energy density in dielectric energy storage capacitors

2008 ◽  
Vol 92 (14) ◽  
pp. 142909 ◽  
Author(s):  
Qin Chen ◽  
Yong Wang ◽  
Xin Zhou ◽  
Q. M. Zhang ◽  
Shihai Zhang
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
High Field ◽  
Maximum Energy ◽  
Limiting Factor

The high energy density and efficiency of PVDF-based composites with double-shell Nd-BaTiO3 particles as fillers

2020 ◽  
Vol 13 (06) ◽  
pp. 2051042
Author(s):  
Zhong Yang ◽  
Jing Wang ◽  
Long He ◽  
Chaoyong Deng ◽  
Kongjun Zhu
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
High Energy ◽  
Maximum Energy ◽  
Dielectric Constants ◽  
High Energy Density ◽  
Element Simulation ◽  
Poly Vinylidene Fluoride

Flexible dielectric capacitors are becoming shining stars in modern electronic devices. Ceramic particles with large dielectric constants and benign compatibility are attractive candidates to enhance the energy storage density of pristine polymer capacitors while guaranteeing their flexibility. In this work, double-shell structure of Al2O3 (AO) and dopamine (PDA) were successively coated on the Nd-doped BaTiO3 (NBT) particles and then introduced into the Poly(vinylidene fluoride) (PVDF) matrix. Obvious enhancement in dielectric constants was observed while the dielectric loss remained nearly constant. For the composite films with 1–4[Formula: see text]vol.% NBT@AO@PDA NPs, the maximum energy density of 9.1[Formula: see text]J/cm3 and energy efficiency of 65% was achieved at 430[Formula: see text]MV/m in the sample with 1[Formula: see text]vol.% filling ratio, which are 1.4 and 1.3 times larger than those of pristine PVDF at 450[Formula: see text]MV/m. The finite element simulation reveals the effective relief of the electric field concentration in the composite film induced by the AO and PDA layers. The greater improvement in the energy storage performance could be anticipated if the dispersity of NBT@AO@PDA NPs was further improved.

Co3S4/NiCo2S4 Nano-Arrays on Nickel Foam as Energy Storage for Supercapacitors

2021 ◽  
Vol 16 (6) ◽  
pp. 891-904
Author(s):  
Xiang-Sen Meng ◽  
Jun Xiang ◽  
Nan Bu ◽  
Yan Guo ◽  
Sroeurb Loy ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Current Density ◽  
Retention Rate ◽  
Nickel Foam ◽  
Maximum Energy ◽  
Capacity Retention ◽  
A Current

In this work, Co3S4/NiCo2S4 nano-arrays electrode with Co3S4 nanocones and NiCo2S4 nanosheets interlaced arrangement are prepared by the promising hydrothermal method. Compared with single Co3S4/NF or NiCo2S4/NF electrode, the prepared Co3S4/NiCo2S4/NF electrode exhibits excellent specific capacitance. At a current density of 2 mA cm−2, the surface capacitance is as high as 9036 mF cm−2, and it still maintains a surface capacitance of 5664 mF cm−2 at a current density of 8 mA cm−2. Co3S4/NiCo2S4/NF||ASC has a high electrochemical performance with a maximum energy density of 0.62 Wh cm−3 and a power density of 15.94 W cm−3. At a current density of 5 mA cm−2, the capacity retention rate is 83.75% after 3000 cycles.

scholarly journals Rescaling of metal oxide nanocrystals for energy storage having high capacitance and energy density with robust cycle life

2015 ◽  
Vol 112 (26) ◽  
pp. 7914-7919 ◽  
Author(s):  
Hyung Mo Jeong ◽  
Kyung Min Choi ◽  
Tao Cheng ◽  
Dong Ki Lee ◽  
Renjia Zhou ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Metal Oxide ◽  
High Performance ◽  
Negative Electrode ◽  
High Energy ◽  
Maximum Energy ◽  
High Energy Density ◽  
High Capacitance ◽  
Dynamics Simulations

Nanocrystals are promising structures, but they are too large for achieving maximum energy storage performance. We show that rescaling 3-nm particles through lithiation followed by delithiation leads to high-performance energy storage by realizing high capacitance close to the theoretical capacitance available via ion-to-atom redox reactions. Reactive force-field (ReaxFF) molecular dynamics simulations support the conclusion that Li atoms react with nickel oxide nanocrystals (NiO-n) to form lithiated core–shell structures (Ni:Li2O), whereas subsequent delithiation causes Ni:Li2O to form atomic clusters of NiO-a. This is consistent with in situ X-ray photoelectron and optical spectroscopy results showing that Ni2+ of the nanocrystal changes during lithiation–delithiation through Ni0 and back to Ni2+. These processes are also demonstrated to provide a generic route to rescale another metal oxide. Furthermore, assembling NiO-a into the positive electrode of an asymmetric device enables extraction of full capacitance for a counter negative electrode, giving high energy density in addition to robust capacitance retention over 100,000 cycles.

Electrode thickness design toward bulk energy storage devices with high areal/volumetric energy density

2021 ◽  
Vol 289 ◽  
pp. 116734 ◽  
Author(s):  
Feng Wang ◽  
Lin Zhang ◽  
Qian Zhang ◽  
Jinjiang Yang ◽  
Gaigai Duan ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Energy Storage Devices ◽  
Electrode Thickness ◽  
Storage Devices ◽  
Bulk Energy

High energy density aqueous zinc–benzoquinone batteries enabled by carbon cloth with multiple anchoring effects

2021 ◽  
Author(s):  
Zhiqiang Luo ◽  
Silin Zheng ◽  
Shuo Zhao ◽  
Xin Jiao ◽  
Zongshuai Gong ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Porous Carbon ◽  
Large Scale ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Cloth ◽  
Anchoring Effects ◽  
High Theoretical Capacity ◽  
Energy Storage Applications

Benzoquinone with high theoretical capacity is anchored on N-plasma engraved porous carbon as a desirable cathode for rechargeable aqueous Zn-ion batteries. Such batteries display tremendous potential in large-scale energy storage applications.

scholarly journals Designing high energy density flow batteries by tuning active-material thermodynamics

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5432-5443
Author(s):  
Shyam K. Pahari ◽  
Tugba Ceren Gokoglan ◽  
Benjoe Rey B. Visayas ◽  
Jennifer Woehl ◽  
James A. Golen ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Density ◽  
Fossil Fuels ◽  
Active Material ◽  
High Energy ◽  
Theoretical Framework ◽  
High Energy Density ◽  
Density Flow ◽  
The Cost

With the cost of renewable energy near parity with fossil fuels, energy storage is paramount. We report a breakthrough on a bioinspired NRFB active-material, with greatly improved solubility, and place it in a predictive theoretical framework.

Evolutionary Structure Prediction Assisted Design of Anode Materials for Ca-Ion Battery Based on Phoshphorene

2021 ◽  
Author(s):  
Chandra Chowdhury ◽  
Pranab Gain ◽  
Ayan Datta
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Structure Prediction ◽  
Anode Materials ◽  
Energy Storage Devices ◽  
Efficient Manner ◽  
Storage Devices ◽  
Multivalent Ions ◽  
Store Energy Density ◽  
P Utilization

Utilization of multivalent ions such as Ca(II), Mg(II), Al(III) in the energy storage devices opens up new opportunities to store energy density in a more efficient manner rather than monovalent...

Excellent comprehensive energy storage capabilities achieved in linear polymer composites via inserting acrylic rubber dielectric elastomers

2021 ◽  
Author(s):  
Jie Chen ◽  
Yifei Wang ◽  
Weixing Chen
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Polymer Composites ◽  
Linear Polymer ◽  
Dielectric Elastomers ◽  
Organic Film ◽  
Available Energy ◽  
Multilayer Composites ◽  
Potential Applications

Multilayer composites have the potential applications in organic film capacitors due to their excellent dielectric and breakdown characteristic. However, poor efficiency (η) and limited available energy density (Ue) of the...

Integration of Single Co Atoms and Ru Nanoclusters Boosts the Cathodic Performance of Nitrogen-Doped 3D Graphene towards Lithium–Oxygen Batteries

2021 ◽  
Author(s):  
Mingrui Liu ◽  
Jing Li ◽  
Bing Chi ◽  
Long Zheng ◽  
Yuexing Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Next Generation ◽  
Energy Storage Devices ◽  
3D Graphene ◽  
Storage Devices ◽  
Nitrogen Doped ◽  
Automotive Batteries ◽  
Lithium Oxygen Batteries

The Li-O2 battery is recognized as one of the most promising energy storage devices for next-generation automotive batteries due to its extremely high theoretical energy density. The design and preparation...

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