Mortise-and-tenon molecular chains enable polymeric hexagonal crystallinity with superior high-temperature capacitor performance.

Authors

Cheng Yao, Yuheng Fu, Yibo Zhang, Zhaodongfang Gao, Zhao Deng, Tao Wang, Shan Wang, Quanling Yang, Chuanxi Xiong, Hongmei Qin, Shuai Nie, Qing Wang

Published in

Science advances. Volume 12. Issue 34. Pages eaeg8624. Aug 21, 2026. Epub Aug 21, 2026.

Abstract

High-symmetry crystalline materials exhibit superior physical properties. However, polymers lack high-symmetry crystals due to their long-chain characteristics. Herein, we report that all-trans poly(adamantane-norbornene-imide) can form high-symmetry hexagonal crystal, exhibiting superior electrical insulation properties and capacitor performances at an elevated temperature of 250°C, characterized by a high breakdown voltage of 802 megavolts per meter, and a notable discharged energy density of 7.29 joules per cubic centimeter, which surpasses all previously reported polymers. We propose that the mortise-and-tenon interlocking between adamantane side groups in polymer chains enables perfectly symmetrical alignment of polymer molecular chains, thereby addressing the challenge of forming high-symmetry crystals in polymers. We anticipate that the mortise-and-tenon interlocking mechanism of polymer chains will lead to the development of more polymers with high-symmetry crystal and superior physical properties.

PMID:
42627923
Bibliographic data and abstract were imported from PubMed on 22 Aug 2026.

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