High energy density in artificial heterostructures through relaxation time modulation

• 成果类型: Article
• 署名作者: Han, Sangmoon; Kim, Justin S.; Park, Eugene; Meng, Yuan; Xu, Zhihao; Foucher, Alexandre C.; Jung, Gwan Yeong; Roh, Ilpyo; Lee, Sangho; Kim, Sun Ok; Moon, Ji-Yun; Kim, Seung-Il; Bae, Sanggeun; Zhang, Xinyuan; Park, Bo-In; Seo, Seunghwan; Li, Yimeng; Shin, Heechang; Reidy, Kate; Hoang, Anh Tuan; Sundaram, Suresh; Vuong, Phuong; Kim, Chansoo; Zhao, Junyi; Hwang, Jinyeon; Wang, Chuan; Choi, Hyungil; Kim, Dong-Hwan; Kwon, Jimin; Park, Jin-Hong; Ougazzaden, Abdallah; Lee, Jae-Hyun; Ahn, Jong-Hyun; Kim, Jeehwan; Mishra, Rohan; Kim, Hyung-Seok; Ross, Frances M.; Bae, Sang-Hoon
• 署名单位: Washington University (WUSTL); Washington University (WUSTL); Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Sungkyunkwan University (SKKU); Sungkyunkwan University (SKKU); Yonsei University; Centre National de la Recherche Scientifique (CNRS); Washington University (WUSTL); Korea Institute of Science & Technology (KIST); Sungkyunkwan University (SKKU); Ulsan National Institute of Science & Technology (UNIST); University System of Georgia; Georgia Institute of Technology; Ajou University; Ajou University; Kyung Hee University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9605
• DOI: 10.1126/science.adl2835
• 发表日期: 2024-04-19
• 页码: 312-317
• 关键词: storage performance; thin-films; dielectric-properties; interface; layer; integration; capacitors; EFFICIENCY

摘要

Electrostatic capacitors are foundational components of advanced electronics and high-power electrical systems owing to their ultrafast charging-discharging capability. Ferroelectric materials offer high maximum polarization, but high remnant polarization has hindered their effective deployment in energy storage applications. Previous methodologies have encountered problems because of the deteriorated crystallinity of the ferroelectric materials. We introduce an approach to control the relaxation time using two-dimensional (2D) materials while minimizing energy loss by using 2D/3D/2D heterostructures and preserving the crystallinity of ferroelectric 3D materials. Using this approach, we were able to achieve an energy density of 191.7 joules per cubic centimeter with an efficiency greater than 90%. This precise control over relaxation time holds promise for a wide array of applications and has the potential to accelerate the development of highly efficient energy storage systems.