Research on the material composition and performance of Li-Si/FeS2 thermal batteries

Abstract

Thermal batteries are disposable storage batteries that use electrolytes that are molten inorganic salts in the temperature range of 400 ÷ 550 ^oC. Along with the development of science and technology, thermal batteries are constantly being researched to improve technical features, such as reducing activation time and mass, while increasing capacity, energy density, working duration, storage time, and ability to withstand harsh working conditions. In this article, we present the results of a study on the chemical composition of Li-Si/FeS₂ thermal batteries and the performance of a single cell as well as a full battery. The analysis shows that the thermal battery utilizes pellet pressing technique. The anode is made of FeS₂, the cathode is made of Li-Si alloy, the electrolyte is a mixture of LiCl and KCl, and the pyrolysis agent is Fe:KClO4. A single cell's voltage is 1,8 V, and a full thermal battery's voltage is 22 V at a 1,5 A discharge current.