scholarly journals Analysis of a Shaftless Semi-Hard Magnetic Material Flywheel on Radial Hysteresis Self-Bearing Drives

Actuators ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 87 ◽  
Author(s):  
Salvatore Circosta ◽  
Angelo Bonfitto ◽  
Christopher Lusty ◽  
Patrick Keogh ◽  
Nicola Amati ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Energy Storage ◽  
Energy Density ◽  
Research Effort ◽  
Magnetic Hysteresis ◽  
Magnetic Suspension ◽  
Maximum Speed ◽  
Hard Magnetic Material ◽  
One Dimensional ◽  
Outer Rotor

Flywheel Energy Storage Systems are interesting solutions for energy storage, featuring advantageous characteristics when compared to other technologies. This has motivated research effort focusing mainly on cost aspects, system reliability and energy density improvement. In this context, a novel shaftless outer-rotor layout is proposed. It features a semi-hard magnetic FeCrCo 48/5 rotor coupled with two bearingless hysteresis drives. The novelty lies in the use of the semi-hard magnetic material, lending the proposed layout advantageous features thanks to its elevated mechanical strength and magnetic properties that enable the use of bearingless hysteresis drives. The paper presents a study of the proposed layout and an assessment of its energetic features. It also focuses on the modeling of the radial magnetic suspension, where the electromagnets providing the levitating forces are modeled through a one-dimensional approach. The Jiles–Atherton model is used to describe the magnetic hysteresis of the rotor material. The proposed flywheel features a mass of 61.2 kg, a storage capability of 600 Wh at the maximum speed of 18,000 rpm and achieves an energy density of 9.8 Wh/kg. The performance of the magnetic suspension is demonstrated to be satisfactory and the influence of the hysteresis of the rotor material is highlighted.

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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