Recently, Professor Liu Wenfeng and his team from the School of Electrical Engineering and the National Key Laboratory of Electrical Insulation for Electrical Materials at Xi'an Jiaotong University were invited by the prestigious journal Advanced Materials to publish a comprehensive review article titled "High-Temperature All-Organic Polymer Dielectrics for Capacitive Energy Storage." This article offers an in-depth and critical assessment of the latest advancements in the field of all-organic polymer dielectrics tailored for high-temperature energy storage applications.

Dielectric capacitors, renowned for their exceptional power density, rapid charge and discharge capabilities, extended cycle life, and high safety and reliability, are extensively utilized in critical sectors such as high-voltage flexible DC transmission, new energy vehicles, pulsed power technology, aerospace, and deep earth exploration. Nevertheless, as power equipment advances to operate under extreme conditions, including elevated temperatures and high electric fields, the performance of conventional polymer dielectrics deteriorates significantly at high temperatures. This degradation poses a significant bottleneck that hampers the reliable operation of power equipment.

Consequently, the development of innovative polymer dielectrics capable of efficient and stable energy storage under such extreme conditions has emerged as a core challenge that demands urgent breakthroughs in this field. Professor Liu Wenfeng's team has undertaken systematic research on high-temperature energy storage polymer dielectrics, achieving notable progress in areas such as material structure-property relationships, performance regulation mechanisms, and high-temperature failure mechanisms.

This review article focuses on pivotal issues including the thermal stability, dielectric response, breakdown mechanism, and conductivity regulation of polymer dielectrics. It systematically summarizes various material design methodologies and provides a detailed elaboration on the crucial roles these strategies play in enhancing breakdown strength, energy storage density, and charge-discharge efficiency. Furthermore, the article delves deeply into the challenges faced by polymer dielectrics at high temperatures, such as conductivity surges, interface charge injection, and thermal runaway, while also offering insights into future development trends.