High‐Temperature and High‐Energy‐Density Dipolar Glass Polymers Based on Sulfonylated Poly(2, 6‐dimethyl‐1, 4‐phenylene oxide). Issue 6 (16th January 2018)

• Record Type: Journal Article
• Authors: Zhang, Zhongbo; Wang, David H.; Litt, Morton H.; Tan, Loon‐Seng; Zhu, Lei
• Is Part Of: Angewandte Chemie international edition. Volume 57:Issue 6(2018)
• Page Start: 1528
• Page End: 1531
• Publication Date: 2018-01-16
• Subjects: dielectric constant -- dipolar glass polymers -- electrical energy storage -- orientational polarization -- polymers; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201710474
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A new class of high‐temperature dipolar polymers based on sulfonylated poly(2, 6‐dimethyl‐1, 4‐phenylene oxide) (SO2 ‐PPO) was synthesized by post‐polymer functionalization. Owing to the efficient rotation of highly polar methylsulfonyl side groups below the glass transition temperature ( T g ≈220 °C), the dipolar polarization of these SO2 ‐PPOs was enhanced, and thus the dielectric constant was high. Consequently, the discharge energy density reached up to 22 J cm −3 . Owing to its high T g , the SO2 ‐PPO25 sample also exhibited a low dielectric loss. For example, the dissipation factor (tan δ) was 0.003, and the discharge efficiency at 800 MV m −1 was 92 %. Therefore, these dipolar glass polymers are promising for high‐temperature, high‐energy‐density, and low‐loss electrical energy storage applications. Abstract : Enhanced dipolar polarization : The dipolar polarization of methylsulfonyl side groups on poly(2, 6‐dimethyl‐1, 4‐phenylene oxide) (PPO) is utilized to enhance the dielectric constant of polymers while keeping the dielectric loss reasonably low. The discharge energy density of this dipolar glass polymer is greater than 20 J cm −3, which is promising for applications in electrical energy storage.