Zou Kailun, Bai Peijia, Li Kanghua, Luo Fangyuan, Liang Jiajie, Lin Ling, Ma Rujun, Li Qi, Jiang Shenglin, Wang Qing, Zhang Guangzu
School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, China.
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, China.
Nat Commun. 2024 Aug 6;15(1):6670. doi: 10.1038/s41467-024-51147-6.
Thermal management emerges as a grand challenge of next-generation electronics. Efforts to develop compact, solid-state cooling devices have led to the exploration of the electrocaloric effect of ferroelectric polymers. Despite recent advances, the applications of electrocaloric polymers on electronics operating at elevated temperatures remain essentially unexplored. Here, we report that the ferroelectric polymer composite composed of highly-polarized barium strontium titanate nanofibers and electron-accepting [6,6] phenyl-C61-butyric acid methyl ester retains fast electrocaloric responses and stable cyclability at elevated temperatures. We demonstrate the effectiveness of electrocaloric cooling in a polymer composite for a pyroelectric energy harvesting device. The device utilizes a simulated central processing unit (CPU) as the heat source. Our results show that the device remains operational even when the CPU is overheated. Furthermore, we show that the composite functions simultaneously as a pyroelectric energy converter to harvest thermal energy from an overheated chip into electricity in the electrocaloric process. This work suggests a distinct approach for overheating protection and recycling waste heat of microelectronics.
热管理已成为下一代电子产品面临的重大挑战。开发紧凑型固态冷却装置的努力促使人们探索铁电聚合物的电热效应。尽管最近取得了进展，但电热聚合物在高温运行的电子产品中的应用基本上仍未得到探索。在此，我们报告由高极化钛酸锶钡纳米纤维和电子受体[6,6]苯基-C61-丁酸甲酯组成的铁电聚合物复合材料在高温下保持快速的电热响应和稳定的循环性。我们展示了电热冷却在用于热释电能量收集装置的聚合物复合材料中的有效性。该装置使用模拟中央处理器（CPU）作为热源。我们的结果表明，即使CPU过热，该装置仍能运行。此外，我们表明该复合材料在电热过程中同时作为热释电能量转换器，将过热芯片的热能转化为电能。这项工作为微电子的过热保护和废热回收提出了一种独特的方法。
