Highly Thermally Conductive and Structurally Ultra‑Stable Graphitic Films with Seamless Heterointerfaces for Extreme Thermal Management  

作　　者：Peijuan Zhang Yuanyuan Hao Hang Shi Jiahao Lu Yingjun Liu Xin Ming Ya Wang Wenzhang Fang Yuxing Xia Yance Chen Peng Li Ziqiu Wang Qingyun Su Weidong Lv Ji Zhou Ying Zhang Haiwen Lai Weiwei Gao Zhen Xu Chao Gao 

机构地区：[1]MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province,Zhejiang University,38 Zheda Road,Hangzhou 310027,People’s Republic of China [2]Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030032,People’s Republic of China [3]Beijing Spacecrafts Manufacturing Co.,Ltd,Beijing Friendship Road 104,Haidian District,Beijing 100094,People’s Republic of China [4]Beijing Institute of Space Mechanics and Electricity,Beijing Friendship Road 104,Haidian District,Beijing 100094,People’s Republic of China [5]China Academy of Aerospace Aerodynamics,Beijing 100074,People’s Republic of China [6]Hangzhou Gaoxi Technol Co.,Ltd,Hangzhou 311113,People’s Republic of China [7]International Research Center for X Polymers,International Campus,Zhejiang University,Haining 314400,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第3期383-397,共15页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52272046,52090030,52090031,52122301,51973191);the Natural Science Foundation of Zhejiang Province(LR23E020003);Shanxi-Zheda Institute of New Materials and Chemical Engineering(2021SZ-FR004,2022SZ-TD011,2022SZ-TD012,2022SZ-TD014);Hundred Talents Program of Zhejiang University(188020*194231701/113,112300+1944223R3/003,112300+1944223R3/004);the Fundamental Research Funds for the Central Universities(Nos.226-2023-00023,226-2023-00082,2021FZZX001-17,K20200060);National Key R&D Program of China(NO.2022YFA1205300,NO.2022YFA1205301,NO.2020YFF0204400,NO.2022YFF0609801);“Pioneer”and“Leading Goose”R&D Program of Zhejiang 2023C01190.

摘　　要：Highly thermally conductive graphitic film(GF)materials have become a competitive solution for the thermal management of high-power electronic devices.However,their catastrophic structural failure under extreme alternating thermal/cold shock poses a significant challenge to reliability and safety.Here,we present the first investigation into the structural failure mechanism of GF during cyclic liquid nitrogen shocks(LNS),which reveals a bubbling process characterized by“permeation-diffusion-deformation”phenomenon.To overcome this long-standing structural weakness,a novel metal-nanoarmor strategy is proposed to construct a Cu-modified graphitic film(GF@Cu)with seamless heterointerface.This well-designed interface ensures superior structural stability for GF@Cu after hundreds of LNS cycles from 77 to 300 K.Moreover,GF@Cu maintains high thermal conductivity up to 1088 W m^(−1)K^(−1)with degradation of less than 5%even after 150 LNS cycles,superior to that of pure GF(50%degradation).Our work not only offers an opportunity to improve the robustness of graphitic films by the rational structural design but also facilitates the applications of thermally conductive carbon-based materials for future extreme thermal management in complex aerospace electronics.

关 键 词：Highly thermally conductive Structurally ultra-stable Graphitic film Extreme thermal management Liquid nitrogen bubbling 

分 类 号：TQ127.11[化学工程—无机化工] TB383.2[一般工业技术—材料科学与工程]