High‐Temperature and High‐Energy‐Density Dipolar Glass Polymers Based on Sulfonylated Poly(2,6‐dimethyl‐1,4‐phenylene oxide)
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 (Tg≈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 Tg , 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 16, 2018
- Source ID
- 10.1002/ange.201710474
Entities
People
- David H Wang
- Lei Zhu
- Loon‐seng Tan
- Morton H Litt
- Zhongbo Zhang
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- Case Western Reserve University
- China Scholarship Council
- Division of Materials Research