High energy density in artificial heterostructures through relaxation time modulation

Title	High energy density in artificial heterostructures through relaxation time modulation
Authors	Sangmoon Han, Justin S. Kim, Eugene Park, Yuan Meng, Zhihao Xu, Alexandre C. Foucher, Gwan Yeong Jung, Ilpyo Roh, Sangho Lee, Sun Ok Kim, Ji-Yun Moon, Seung-Il Kim, Sanggeun Bae, Xinyuan Zhang, Bo-In Park, Seunghwan Seo, Yimeng Li, Heechang Shin, Kate Reidy, Anh Tuan Hoang, Suresh Sundaram, Phuong Vuong, Chansoo Kim, Junyi Zhao, Jinyeon Hwang, Chuan Wang, Hyungil Choi, Dong-Hwan Kim, Jimin Kwon, Jin-Hong Park, Abdallah Ougazzaden, Jae-Hyun Lee, Jong-Hyun Ahn, Jeehwan Kim, Rohan Mishra, Hyung-Seo
Magazine	Science
Date	04/19/2024
DOI	10.1126/science.adl2835
Introduction	Electrostatic capacitors are essential components in modern electronics and high-power electrical systems, known for their rapid charging and discharging capabilities. While ferroelectric materials possess high maximum polarisation, their high remnant polarisation has historically limited their effective use in energy storage. Previous methods faced challenges due to degradation in the crystallinity of these ferroelectric materials. This work introduces a novel approach to precisely modulate the relaxation time using two-dimensional (2D) materials within 2D/3D/2D heterostructures. This strategy minimises energy loss while successfully preserving the crystallinity of the ferroelectric 3D components. Through this innovative methodology, an impressive energy density of 191.7 joules per cubic centimetre was achieved, alongside an efficiency exceeding 90%. This precise control over relaxation time presents significant potential for a broad range of applications, promising to accelerate the advancement of highly efficient energy storage systems.
Quote	Sangmoon Han, Justin S. Kim and Eugene Park et al. High energy density in artificial heterostructures through relaxation time modulation. Science. 2024. Vol. 384(6693):312-317. DOI: 10.1126/science.adl2835
Materials	Crystals
Industry	Electronics , Energy Storage & Batteries