Ultrahigh capacitive energy storage through dendritic nanopolar design

• 成果类型: Article
• 署名作者: Liu, Yajing; Zhang, Yang; Wang, Jing; Yang, Chao; Wang, Hongguang; MacManus-Driscoll, Judith L.; Yang, Hao; van Aken, Peter A.; Li, Weiwei; Nan, Ce-Wen
• 署名单位: Nanjing University of Aeronautics & Astronautics; Nanjing University of Aeronautics & Astronautics; Nanjing University of Aeronautics & Astronautics; Max Planck Society; University of Cambridge; Tsinghua University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12163
• DOI: 10.1126/science.adt2703
• 发表日期: 2025-04-10
• 页码: 211-216
• 关键词: temperature-dependence; thin-films; density; polymer

摘要

Electrostatic dielectric capacitors with ultrahigh power densities are sought after for advanced electronic and electrical systems owing to their ultrafast charge-discharge capability. However, low energy density resulting from low breakdown strength and suppressed polarization still remains a daunting challenge for practical applications. We propose a microstructural strategy with dendritic nanopolar (DNP) regions self-assembled into an insulator, which simultaneously enhances breakdown strength and high-field polarizability and minimizes energy loss and thus markedly improves energy storage performance and stability. For illustration, in this study, we achieved a high energy density of 215.8 joules per cubic centimeter with an efficiency of 80.7% at a high electric field of 7.4 megavolts per centimeter in a DNP structure-designed PbZr0.53Ti0.47O3-MgO film. The proposed strategy is generally applicable for development of high-performance dielectric microcapacitors.