scholarly journals Preparation of Al/Ni Reactive Multilayer Foils and its Application in Thermal Battery

2020 ◽  
Vol 646 (4) ◽  
pp. 200-206
Author(s):  
Yanli Zhu ◽  
Jia Geng ◽  
Fang Wang ◽  
Shi Yan ◽  
Penglong Zhao ◽  
...  
Keyword(s):  
Thermal Battery ◽  
Multilayer Foils

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Advanced Emergency Power System Using Thermal Battery for Future Aircraft

2006 ◽  
Author(s):  
Jae Byoung Cha ◽  
Dong Kyoo Choi ◽  
Sun Wook Park ◽  
Kwang Chae Jung ◽  
Sang Baek Lee ◽  
...  
Keyword(s):  
Power System ◽  
Thermal Battery ◽  
Emergency Power

Development of 2D thermal battery model for Lithium-ion pouch cells

2013 ◽  
Author(s):  
Ahmadou Samba ◽  
Noshin Omar ◽  
Hamid Gualous ◽  
Peter Van den Bossche ◽  
Joeri Van Mierlo ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Thermal Battery ◽  
Battery Model

scholarly journals Phase Transformations in Cu-Zr Multilayers

1993 ◽  
Vol 311 ◽  
Author(s):  
T.T. Weihs ◽  
T.T. Barbee ◽  
M.M. Wall
Keyword(s):  
Phase Transformations ◽  
Equilibrium Phase ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Multilayer Foils ◽  
Short Range Ordering ◽  
Magnetron Sputter Deposition ◽  
Magnetron Sputter ◽  
Long Range Ordering ◽  
Zr Alloys

ABSTRACTA study of phase transformations is reported for Cu-rich, Cu-Zr multilayer foils that were synthesized using magnetron sputter deposition and annealed using a differential scanning calorimeter. The foils range in composition from 1.6 at% to 9.0 at% Zr and consist of alternate layers of polycrystalline Cu and Zr. Differential scanning calorimetry, X-ray analysis and electron microscopy were used to examine three distinct reactions in the foils: a mixing and an amorphization of the Cu and the Zr, a crystallization to the metastable intermetallic, Cu51Zr14, and a transformation of the Cu51Zr14 phase into the equilibrium phase, Cu9Zr2. The asdeposited layering remained stable during the first two reactions and then broke down in the third reaction as large grains of Cu9Zr2 encompassed the smaller Cu grains. The heats of the reactions and the activation energies of these reactions are measured and are compared to values reported for bulk samples. The measured heats support the observation that amorphous Cu-Zr alloys phase separate and provide evidence that mixing and short range ordering produce 3.5 times more heat than long range ordering when Cu and Zr react and form Cu51Zr14.

scholarly journals Multi-Objective Optimization of Activation Time and Discharge Time of Thermal Battery Using a Genetic Algorithm Approach

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6477
Author(s):  
Qing Li ◽  
Yu-Qiang Shao ◽  
Huan-Ling Liu ◽  
Xiao-Dong Shao
Keyword(s):  
Genetic Algorithm ◽  
Heat Transfer Analysis ◽  
Activation Time ◽  
Discharge Time ◽  
Thermal Battery ◽  
Multi Objective ◽  
Multi Objective Genetic Algorithm ◽  
Thermal Batteries ◽  
Genetic Algorithm Approach ◽  
Bottom Heat

Activation time and discharge time are important criteria for the performance of thermal batteries. In this work a heat transfer analysis is carried out on the working process of thermal batteries. The effects of the thicknesses of heat pellets which are divided into three groups and that of the thickness of insulation layers on activation time and discharge time of thermal batteries are numerically studied using Fluent 15.0 when the sum of the thickness of heating plates and insulation layers remain unchanged. According to the numerical results, the optimal geometric parameters are obtained by using multi-objective genetic algorithm. The results show that the activation time is mainly determined by the thickness of the bottom heat pellet, while the discharge time is determined by the thickness of the heat pellets and that of the insulation layers. The discharge time of the optimized thermal battery is increased by 4.08%, and the activation time is increased by 1.23%.

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