首页|Heat transfer enhanced inorganic phase change material compositing carbon nanotubes for battery thermal management and thermal runaway propagation mitigation

Heat transfer enhanced inorganic phase change material compositing carbon nanotubes for battery thermal management and thermal runaway propagation mitigation

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Developing technologies that can be applied simultaneously in battery thermal management(BTM)and thermal runaway(TR)mitigation is significant to improving the safety of lithium-ion battery systems.Inorganic phase change material(PCM)with nonflammability has the potential to achieve this dual func-tion.This study proposed an encapsulated inorganic phase change material(EPCM)with a heat transfer enhancement for battery systems,where Na2HPO4·12H2O was used as the core PCM encapsulated by sil-ica and the additive of carbon nanotube(CNT)was applied to enhance the thermal conductivity.The microstructure and thermal properties of the EPCM/CNT were analyzed by a series of characterization tests.Two different incorporating methods of CNT were compared and the proper CNT adding amount was also studied.After preparation,the battery thermal management performance and TR propagation mitigation effects of EPCM/CNT were further investigated on the battery modules.The experimental results of thermal management tests showed that EPCM/CNT not only slowed down the temperature ris-ing of the module but also improved the temperature uniformity during normal operation.The peak bat-tery temperature decreased from 76 ℃ to 61.2 ℃ at 2 C discharge rate and the temperature difference was controlled below 3 ℃.Moreover,the results of TR propagation tests demonstrated that non-flammable EPCM/CNT with good heat absorption could work as a TR barrier,which exhibited effective mitigation on TR and TR propagation.The trigger time of three cells was successfully delayed by 129,474 and 551 s,respectively and the propagation intervals were greatly extended as well.

Inorganic phase change materialCarbon nanotubeBattery thermal managementThermal runaway propagationFire resistanceEncapsulation

Xinyi Dai、Ping Ping、Depeng Kong、Xinzeng Gao、Yue Zhang、Gongquan Wang、Rongqi Peng

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Center for Offshore Engineering and Safety Technology,China University of Petroleum(East China),Qingdao 266580,Shandong,China

College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China

National Key Research and Development ProgramNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

2022YFE0207400U22A2016852174225

2024

10.1016/j.jechem.2023.10.001

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
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