Molecular Understanding of Heat Transfer in Ionic-Liquid-based Electric Double Layers

作     者：ZENG Ziya ZENG Liang WANG Ruzhu FENG Guang ZENG Ziya;ZENG Liang;WANG Ruzhu;FENG Guang

作者机构：Institute of Refrigeration and CryogenicsShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Coal CombustionSchool of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2023年第32卷第1期

页      面：192-205页

核心收录：

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：financially supported by the National Natural Science Foundation of China(52161135104,51876072) the Hubei Provincial Natural Science Foundation of China(2020CFA093) supported by the Program for HUST Academic Frontier Youth Team 

主　　题：supercapacitor solid-liquid interface electric double layer thermal resistance molecular dynamics simulation 

摘      要：Electric double layer capacitors(EDLCs)as promising electrical energy storage devices are faced with thermal management issues,which concern the performance and lifetime of the *** transfer at the solid-liquid interface has a crucial impact on the thermal management of *** this work,the interfacial thermal resistance(Kapitza resistance)of the interface between ionic liquid(IL)and graphite electrode is determined,and the heat transfer resistance in the uncharged/charged system with different temperatures is investigated via molecular dynamics *** is found that Kapitza resistance near the negative-charged interface decreases by 23%compared to that in the uncharged system,while the temperature effect on Kapitza resistance is little in our *** unique ion layer structure of ILs formed at the interface may influence the thermal transport *** are performed to investigate the effects of surface charge and working temperature on the heat transfer resistance of interfacial ILs from three aspects:ionic spacing,inter-ion interaction,and heat *** the influence of surface charge,ionic spacing in the electric double layer is found to decrease while the inter-ion interaction and heat capacity increase,leading to the reduction in thermal resistance of interfacial ***,rising temperature has small effects on the three thermal properties,with a slight tendency to increase the thermal resistance of ILs.