Review of research progress on corrosion and anti-corrosion of phase change materials in thermal energy storage systems

High-temperature ternary Cu–Si–Al alloy as a core–shell microencapsulated phase change material: fabrication via dry synthesis method and its thermal stability mechanism

“…3 Molten salts and alloy series materials that undergo a phase change in the high temperature range have been researched. 10 Molten salts are economical (Z110 US$ per tonne), 11 which has led to extensive material development 12 and application research. 13 However, the low thermal conductivity 14 and the associated inflexibility have been problematic.…”

“…15 Rea et al have successfully demonstrated a prototype TES system using Al-Si LHS materials. 16 However, alloy-based LHS materials have a high corrosiveness, 10 leading to challenges such as storage container damage, leakage, and safety concerns. Moreover, LHS materials transitioning between liquid and solid phases posed issues in handling.…”

“…Microencapsulated phase change materials (MEPCMs), a type of anti-corrosive packing, 10 is considered promising due to benefits like increased heat transfer surface area of the PCM and reduced volume change associated with phase transition. 17,18 The MEPCMs are expected to prevent corrosion and improve PCM manageability.…”