Department of Macromolecular Science and Engineering and Department of Chemistry, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH, 44106-7202, USA.
Materials and Manufacturing Directorate, Soft Matter Materials Branch (AFRL/RXAS), Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, 45433-7750, USA.
Angew Chem Int Ed Engl. 2018 Feb 5;57(6):1528-1531. doi: 10.1002/anie.201710474. Epub 2018 Jan 16.
A new class of high-temperature dipolar polymers based on sulfonylated poly(2,6-dimethyl-1,4-phenylene oxide) (SO -PPO) was synthesized by post-polymer functionalization. Owing to the efficient rotation of highly polar methylsulfonyl side groups below the glass transition temperature (T ≈220 °C), the dipolar polarization of these SO -PPOs was enhanced, and thus the dielectric constant was high. Consequently, the discharge energy density reached up to 22 J cm . Owing to its high T , the SO -PPO 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 was 92 %. Therefore, these dipolar glass polymers are promising for high-temperature, high-energy-density, and low-loss electrical energy storage applications.
一类新型的高温偶极聚合物是通过后聚合功能化合成的，基于磺化聚（2,6-二甲基-1,4-亚苯基氧化物）（SO-PPO）。由于高度极性的甲基磺酰侧基在玻璃化转变温度（T≈220°C）以下的有效旋转，这些 SO-PPO 的偶极极化增强，因此介电常数较高。因此，放电能量密度高达 22 J cm -3 。由于其高 T g ，SO-PPO 样品还表现出低介电损耗。例如，损耗因子（tanδ）为 0.003，在 800 MV m 时的放电效率为 92%。因此，这些偶极玻璃聚合物有望用于高温、高能量密度和低损耗的电能存储应用。
