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

Abstract

The conventional heating materials of thermal battery have the disadvantages of low combustion rate and less heat release, so it is necessary to develop new heating materials. Al/Ni Reactive Multilayer Foils (RMFs) is an ideal heat source due to its high heat release, fast burning speed and no gas generated during combustion. Al/Ni RMFs were prepared by magnetron sputtering, and the heat transfer process of thermal battery using Al/Ni RMFs as heating material was simulated by the COMSOL MULTIPHYSICS simulation. The Al/Ni RMFs combustion reaction mechanism with different Al/Ni ratios was proposed according to DSC and XRD results. The effects of Al/Ni atomic ratio of RMFs on the melting time of electrolyte were investigated, and the temperature distribution during the activation was obtained, indicating the rapid activation process of the thermal battery.

Microstructural Characterization and Self‐Propagation Properties of Reactive Al/Ni Multilayers Deposited onto Wavelike Surface Morphologies: Influence on the Propagation Front Velocity

“…[ 1,2 ] In the reaction process of the binary system of Al/Ni (RMS Al/Ni), the energy released, well known as the heat of reaction, and the velocity of propagation are features of great interest for diverse technological applications. Including their use in bonding, [ 3 ] thermal batteries, [ 4 ] and the synthesis of high entropy alloys. [ 5 ] Therefore, theoretical and experimental investigations have been carried out to elucidate the dependence of the reaction characteristics on parameters such as the atomic composition ratio, the bilayer thickness, and the premixed thickness at the interface of RMS.…”

“…[1,2] In the reaction process of the binary system of Al/Ni (RMS Al/Ni), the energy released, well known as the heat of reaction, and the velocity of propagation are features of great interest for diverse technological applications. Including their use in bonding, [3] thermal batteries, [4] and the synthesis of high entropy alloys. [5] Reactive multilayer systems are nanostructures of great interest for various technological applications because of their high energy release rate during the selfpropagating reaction of their components.…”

Phase Transformation and Characterization of 3D Reactive Microstructures in Nanoscale Al/Ni Multilayers

“…The released heat of the reaction promotes the reaction in the neighboring zones, establishing a self-sustained and self-propagating reaction [1,2]. Due to the high amount of stored chemical energy and the large energy release rate of RMS, they can be used in technological applications such as welding, brazing, or in thermal batteries [3][4][5][6]. More recently, Al/Ni RMS were used as an ultrafast heat source to produce high entropy alloy films [7].…”

Influence of Initial Temperature and Convective Heat Loss on the Self-Propagating Reaction in Al/Ni Multilayer Foils

“…Fast and steady reaction and releasing a huge amount of energy on a very short time scale are the main beneficial aspects, applied in different fields of science and engineering. For example, applications are found in aerospace [14], thermal batteries [15], and potential application in drug delivery systems [16], where thermally actuated valving mechanism could be obtained by the development of reactive nanorods and porous thin films, and also at a smaller scale, such as joining electrical components in the semiconductor industry [17,18], welding [19], self-healing [20], etc. When the periodic bilayer thickness is less than 200 nm, the diffusion length decreases, and atomic diffusion will play a dominating role in the direction normal to the multilayer surface and thermal diffusion along the layers will be the governing process.…”