Enhanced energy storage in antiferroelectrics via antipolar frustration

• 成果类型: Article
• 署名作者: Yang, Bingbing; Liu, Yiqian; Jiang, Ru-Jian; Lan, Shun; Liu, Su-Zhen; Zhou, Zhifang; Dou, Lvye; Zhang, Min; Huang, Houbing; Chen, Long-Qing; Zhu, Yin-Lian; Zhang, Shujun; Ma, Xiu-Liang; Nan, Ce-Wen; Lin, Yuan-Hua
• 署名单位: Tsinghua University; Chinese Academy of Sciences; Hefei Institutes of Physical Science, CAS; Chinese Academy of Sciences; Institute of Metal Research, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Beijing Institute of Technology; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Songshan Lake Materials Laboratory; Hunan University of Science & Technology; University of Wollongong; Chinese Academy of Sciences; Institute of Physics, CAS
• 刊物名称: Nature
• ISSN/ISSBN: 0028-2286
• DOI: 10.1038/s41586-024-08505-7
• 发表日期: 2025-01-30
• 关键词: density; performance; films; capacitors; polymer

摘要

Dielectric-based energy storage capacitors characterized with fast charging and discharging speed and reliability1, 2, 3-4 play a vital role in cutting-edge electrical and electronic equipment. In pursuit of capacitor miniaturization and integration, dielectrics must offer high energy density and efficiency5. Antiferroelectrics with antiparallel dipole configurations have been of significant interest for high-performance energy storage due to their negligible remanent polarization and high maximum polarization in the field-induced ferroelectric state6, 7-8. However, the low antiferroelectric-ferroelectric phase-transition field and accompanying large hysteresis loss deteriorate energy density and reliability. Here, guided by phase-field simulations, we propose a new strategy to frustrate antipolar ordering in antiferroelectrics by incorporating non-polar or polar components. Our experiments demonstrate that this approach effectively tunes the antiferroelectric-ferroelectric phase-transition fields and simultaneously reduces hysteresis loss. In PbZrO3-based films, we hence realized a record high energy density among all antiferroelectrics of 189 J cm-3 along with a high efficiency of 81% at an electric field of 5.51 MV cm-1, which rivals the most state-of-the-art energy storage dielectrics9, 10, 11-12. Atomic-scale characterization by scanning transmission electron microscopy directly revealed that the dispersed non-polar regions frustrate the long-range antipolar ordering, which contributes to the improved performance. This strategy presents new opportunities to manipulate polarization profiles and enhance energy storage performances in antiferroelectrics.