Abstract

Today the main problem of Li-ion batteries using is their high tendency to ignition. This paper proposes the utilization of hydrated inorganic salts as phase-change materials (PCMs) to maintain thermal balance within battery cells, inasmuch as these salts are not prone to combustion, unlike their organic analogs. Studies of three inorganic salts with addition of PEG 600 and various nucleating agents to improve their thermophysical properties were conducted. Results show that adding 20% PEG 600 gives a more cycling stable PCM without considerable effect on its melting temperature but with decreasing its heat of fusion. This research shows that mixing an inorganic PCM with an organic additive can be a good option to improve the thermal performance of the PCM.