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A Scalable, High?Throughput, and Environmentally Benign Approach to Polymer Dielectrics Exhibiting Significantly Improved Capacitive Performance at High Temperatures

High?temperature capability is critical for polymer dielectrics in the next?generation capacitors demanded in harsh?environment electronics and electrical?power applications. It is well recognized that the energy?storage capabilities of dielectrics are degraded drastically with increasing temperature due to the exponential increase of conduction loss. Here, a general and scalable method to enable significant improvement of the high?temperature capacitive performance of the current polymer dielectrics is reported. The high?temperature capacitive properties in terms of discharged energy density and the charge–discharge efficiency of the polymer films coated with SiO2 via plasma?enhanced chemical vapor deposition significantly outperform the neat polymers and rival or surpass the state?of?the?art high?temperature polymer nanocomposites that are prepared by tedious and low?throughput methods. Moreover, the surface modification of the dielectric films is carried out in conjunction with fast?throughput roll?to?roll processing under ambient conditions. The entire fabrication process neither involves any toxic chemicals nor generates any hazardous by?products. The integration of excellent performance, versatility, high productivity, low cost, and environmental friendliness in the present method offers an unprecedented opportunity for the development of scalable high?temperature polymer dielectrics.

» Author: Yao Zhou, Qi Li, Bin Dang, Yang Yang, Tao Shao, He Li, Jun Hu, Rong Zeng, Jinliang He, Qing Wang

» Reference: doi:10.1002/adma.201805672

» Publication Date: 04/10/2018

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