Ultrafast battery heat dissipation enabled by highly ordered and interconnected hexagonal boron nitride thermal conductive composites  

作　　者：Zhuoya Wang Kaihang Zhang Bing Zhang Zheming Tong Shulan Mao Hao Bai Yingying Lu 

机构地区：[1]State Key Laboratory of Chemical Engineering,Institute of Pharmaceutical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,China [2]Brook Byers Institute of Sustainable Systems and School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta,GA,30332,USA [3]ZJU-Hangzhou Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou,311200,China [4]State Key Laboratory of Fluid Power and Mechatronic Systems,College of Mechanical Engineering,Zhejiang University,Hangzhou,310027,China

出　　处：《Green Energy & Environment》2022年第6期1401-1410,共10页绿色能源与环境（英文版）

基　　金：supported by the National Key R&D Program of China(2018YFA0209600);the National Natural Science Foundation of China(22022813,21878268);the Leading Innovative and Enterpreneur Team Introduction Program of Zhejiang(2019R01006)。

摘　　要：Heat dissipation involved safety issues are crucial for industrial applications of the high-energy density battery and fast charging technology.While traditional air or liquid cooling methods suffering from space limitation and possible leakage of electricity during charge process,emerging phase change materials as solid cooling media are of growing interest.Among them,paraffin wax(PW)with large latent heat capacity and low cost is desirable for heat dissipation and thermal management which mainly hindered by their relatively low thermal conductivity and susceptibility to leakage.Here,highly ordered and interconnected hexagonal boron nitride(h-BN)networks were established via ice template method and introduced into PW to enhance the thermal conductivity.The composite with 20 wt%loading amount of h-BN can guarantee a highly ordered network and exhibited high thermal conductivity(1.86 W m^(-1) K^(-1))which was 4 times larger compared with that of random dispersed h-BN involved PW and nearly 8 times larger compared with that of bare PW.The optimal thermal conductive composites demonstrated ultrafast heat dissipation as well as leakage resistance for lithium-ion batteries(LIBs),heat generated by LIBs can be effectively transferred under the working state and the surface temperature kept 6.9℃ lower at most under 2–5℃ continuous charge-discharge process compared with that of bare one which illustrated great potential for industrial thermal management.

关 键 词：Hexagonal boron nitride Paraffin wax Lithium-ion batteries Thermal conductive network Battery heat dissipation 

分 类 号：TM912[电气工程—电力电子与电力传动]