Shearo-caloric effect enhances elastocaloric responses in polymer composites for solid-state cooling

Shixian Zhang, Yuheng Fu, Xinxing Nie, Chenjian Li, Youshuang Zhou, Yaqi Wang, Juan Yi, Wenlai Xia, Yiheng Song, Qi Li, Chuanxi Xiong (), Suxin Qian (), Quanling Yang () and Qing Wang ()
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Shixian Zhang: Wuhan University of Technology
Yuheng Fu: Wuhan University of Technology
Xinxing Nie: Wuhan University of Technology
Chenjian Li: Wuhan University of Technology
Youshuang Zhou: Hubei University
Yaqi Wang: Wuhan University of Technology
Juan Yi: Wuhan University of Technology
Wenlai Xia: Wuhan University of Technology
Yiheng Song: Wuhan University of Technology
Qi Li: Tsinghua University
Chuanxi Xiong: Wuhan University of Technology
Suxin Qian: Xi’an Jiaotong University
Quanling Yang: Wuhan University of Technology
Qing Wang: The Pennsylvania State University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Room-temperature elastocaloric cooling is considered as a zero-global-warming-potential alternative to conventional vapor-compression refrigeration technology. However, the limited entropy and large-deformation features of elastocaloric polymers hinder the creation of the breakthrough in their caloric responses and device development. Herein, we report that the addition of a small amount of inorganic nanofillers into the polymer induces the aggregate of the effective elastic chains via shearing the interlaminar molecular chains, which provides an additional contribution to the entropy in elastocaloric polymers. Consequently, the adiabatic temperature change of −18.0 K and the isothermal entropy change of 187.4 J kg−1 K−1 achieved in the polymer nanocomposites outperform those of current elastocaloric polymers. Moreover, a large-deformation cooling system with a work recovery efficiency of 56.3% is demonstrated. This work opens a new avenue for the development of high-performance elastocaloric polymers and prototypes for solid-state cooling applications.

Date: 2024
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DOI: 10.1038/s41467-024-50870-4

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