Thermal management of chips by a device prototype using synergistic effects of 3-D heat-conductive network and electrocaloric refrigeration

Ming-Ding Li, Xiao-Quan Shen, Xin Chen, Jia-Ming Gan, Fang Wang, Jian Li, Xiao-Liang Wang and Qun-Dong Shen ()
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Ming-Ding Li: Nanjing University
Xiao-Quan Shen: Nanjing University
Xin Chen: The Pennsylvania State University
Jia-Ming Gan: Nanjing University
Fang Wang: Nanjing University
Jian Li: Nanjing University
Xiao-Liang Wang: Nanjing University
Qun-Dong Shen: Nanjing University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract With speeding up development of 5 G chips, high-efficient thermal structure and precise management of tremendous heat becomes a substantial challenge to the power-hungry electronics. Here, we demonstrate an interpenetrating architecture of electrocaloric polymer with highly thermally conductive pathways that achieves a 240% increase in the electrocaloric performance and a 300% enhancement in the thermal conductivity of the polymer. A scaled-up version of the device prototype for a single heat spot cooling of 5 G chip is fabricated utilizing this electrocaloric composite and electromagnetic actuation. The continuous three-dimensional (3-D) thermal conductive network embedded in the polymer acts as nucleation sites of the ordered dipoles under applied electric field, efficiently collects thermal energy at the hot-spots arising from field-driven dipolar entropy change, and opens up the high-speed conduction path of phonons. The synergy of two components, thus, tackles the challenge of sluggish heat dissipation of the electroactive polymers and their contact interfaces with low thermal conductivity, and more importantly, significantly reduces the electric energy for switching the dipolar states during the electrocaloric cycles, and increases the manipulable entropy at the low fields. Such a feasible solution is inevitable to the precisely fixed-point thermal management of next-generation smart microelectronic devices.

Date: 2022
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DOI: 10.1038/s41467-022-33596-z

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