Development Of High Specific Energy Thermal Battery

Along with the battery electrode material’s rapid development, the new thermo generator’s development also entered the high speed period of expansion. One important strategy to achieve this goal is to apply new electrode materials to construct high-energy-density thermal batteries, namely the ones with higher powers, lighter-weights and smaller-volumesIn this work, high energy density thermal batteries with promising application in defense engineering have been developed, based on the so-called "six-in-one module" thin cell structure, light-weighted titanium alloy materials, and high-capacity electrode materials.At the discharge current density higher than 400 mA/cm2, the battery consisting of CoS2|LiBr-LiF-LiCl|LiB has an extended service life, and a reduced weight and volume.At the discharge current density lower than 200 mA/cm2, the battery consisting of FeS2|LiBr-LiF-LiCl| LiSi has a longer service life. The use of titanium alloy material can reduce the battery weight by a factor of ca.20 wt%, and thus a higher energy density can be obtained.Both CoS2|LiBr-LiF-LiCl|LiB and FeS2|LiBr-LiF-LiCl|LiSi batteries can be practically used in a temperature ranging from-45 to+70℃. The energy densities of both thermal batteries are over 45 Wh/kg.