Thermal energystoragesystemshavebeenrecognizedasoneofthemostefficient waystoenhancethe
energy efficiency andsustainability,andhavereceivedagrowingattentioninrecentyears.Theuseof
phase changematerials(PCMs)inbuildingapplicationscannotonlyimprovetheindoorthermalcomfort
but alsoenhancetheenergyefficiency.ThenecessitytoenhancethermalconductivityofthePCMsis
evident duetoitslowenergycharging/dischargingrates.Therefore,thehighthermalconductivity
additivesorinsertstoenhancethermalconductivityortoformthecompositePCMaresoughttoachieve
high energycharging/dischargingrates.Inthispaper,theexperimentalandtheoreticalmethodsto
enhance thethermalconductivityofthePCMsaresummarized,andthethermalconductivityinserts/
additivesinrecentinvestigationsarelistedandsummarized.Theevaluationofeachthermalconductivity
enhancement methodisdiscussed