▎ 摘　　要

This article, taking phase change material (PCM) aluminum potassium sulfate dodecahydrate (KAI(SO4)(2) center dot 12H(2)O) as the object of study, researches the effects of graphene nanoplatelets (GN) on the thermal conductivity of KAI(SO4)(2) center dot 12H(2)O. Correlated analysis shows that KAI(SO4)(2) center dot 12H(2)O can be combined with GN to form KAI(SO4)(2) center dot 12H(2)O/GN composites. The thermal conductivity of KAI(SO4)(2) center dot 12H(2)O/GN composites improves significantly with the increase of GN contents. When the content of GN up to 2.5 wt%, the thermal conductivity of the composites is 1.311 W/m . k, increasing by 120% compared with the pure KAI(SO4)(2) center dot 12H(2)O, the thermal storage time reduces by 31.9%. Meanwhile, GN can improve the undercooling of KAI(SO4)2 center dot 12H(2)O. When the content of GN is 2.5 wt%, the minimum undercooling is 31.1 degrees C, reducing by 28.5% compared with the pure KAI(SO4)(2) center dot 12H(2)O. X-ray diffractometry (XRD) analysis shows that the crystal structure of KAI(SO4)(2) center dot 12H(2)O is basically unchanged with the composite of GN after circulation. In general, GN have a great effect on improving the thermal conductivity of KAI(SO4)(2) center dot 12H(2)O and have a good application prospect in the field of phase change thermal storage.