Ha Su-Jin, Jang Hye-Jeong, Son Hui-Jin, Moon Young Kook, Cha Hyun-Ae, Choi Jong-Jin, Ahn Jee-Hyuk, Hahn Byung-Dong, Cho Kyung-Hoon, Ahn Do-Cheon, Lim Jun, Jeon Sang-Chae, Jung In Chul, Song Youngsup, Zhou Hao, Feng Tianli, Ahn Cheol-Woo
Functional Ceramics Department, Powder & Ceramics Division, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam, 641-831, Republic of Korea.
School of Materials Science and Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk, 39177, Republic of Korea.
Adv Mater. 2025 Aug 27:e10237. doi: 10.1002/adma.202510237.
The escalating frequency of electric vehicle (EV) fires has underscored the critical importance of effective thermal-management in battery package (TMBP). A key challenge in current TMBP lies with the low thermal conductivity (TC, 3 W m K) of commercial alumina-polymer composite (thermal interface materials, TIM). While magnesia (MgO) TIMs, which show high TC (8-10 W m K, this study) and low cost, are emerging as an alternative heat-dissipation material (HDM), their full potential remains untapped. Here, the development of novel MgO (≥ 80 W m K) and MgO TIMs is presented as next-generation HDMs, designed to outperform conventional alumina (20-30 W m K) and alumina TIMs. Crucially, the fundamental mechanisms enabling our new MgO to achieve an unprecedented TC of ≥ 80 W m K are elucidated, significantly surpassing the previously reported range of 40-60 W m K. This study provides fundamental insights into achieving such high thermal conductivity in MgO. Furthermore, it is demonstrated that this novel MgO TIM cools EV batteries three times faster than commercial alternatives, offering a robust solution for effective EV fire prevention. Consequently, this high-TC MgO is poised to contribute significantly to enhancing EV safety.
电动汽车（EV）起火频率的不断上升凸显了电池组有效热管理（TMBP）的至关重要性。当前TMBP面临的一个关键挑战在于商用氧化铝-聚合物复合材料（热界面材料，TIM）的热导率较低（TC，3 W m K）。虽然氧化镁（MgO）TIM显示出高热导率（本研究中为8-10 W m K）且成本低廉，正成为一种替代散热材料（HDM），但其全部潜力仍未得到充分挖掘。在此，新型MgO（≥80 W m K）和MgO TIM作为下一代HDM被提出，旨在超越传统氧化铝（20-30 W m K）和氧化铝TIM。至关重要的是，阐明了使我们新型MgO能够实现≥80 W m K这一前所未有的热导率的基本机制，显著超过了先前报道的40-60 W m K范围。本研究为在MgO中实现如此高的热导率提供了基本见解。此外，已证明这种新型MgO TIM冷却电动汽车电池的速度比商用替代品快三倍，为有效预防电动汽车起火提供了有力解决方案。因此，这种高热导率的MgO有望为提高电动汽车安全性做出重大贡献。
