Magnetoelectric composite engineered dielectric energy storage in flexible film capacitor devices
Abstract
In contrast to traditional dielectric capacitors limited to electrical energy storage, this work proposes a magnetoelectric composite film enabling dual-field energy conversion and storage in both magnetic and electric fields. Such a dual-field synergistic energy storage capacitor overcomes the limitations of conventional single-field systems, where the energy storage density and efficiency are severely constrained by dielectric losses and the intrinsic trade-off in ferroelectric materials under pure electric fields. Utilizing a hybrid fabrication technique combining cluster beam deposition with chemical solution deposition, the Sr2Bi4Ti5O18/TbFe2 cluster composite film capacitor was fabricated on a flexible Pt/Mica substrate. Under external magnetic fields, the TbFe2 cluster layer generates a giant magnetostrictive strain, which subsequently induces an electrical polarization signal in the ferroelectric Sr2Bi4Ti5O18 layer via the piezoelectric response, achieving dual-field energy conversion and storage. At a magnetic field of 1 T, the energy storage density and efficiency of the flexible film capacitor increase by 19.2% and 5.5%, respectively. This dual-field synergistic energy storage strategy provides a unique design paradigm for enabling the multifunctional and diversified applications of dielectric capacitors.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (7)
Yueshun Zhao
School of Physical Science and Technology, & Inner Mongolia Key Lab of Microscale Physics and Atomic Manufacturing, Inner Mongolia University 1 , Hohhot 010021,
Tian Qin
Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
Yongquan Chen
Guixin He
School of Physical Science and Technology and Inner Mongolia Key Laboratory of Microscale Physics and Atomic Manufacturing, Inner Mongolia University 1 , Hohhot 010021,
Huatao Xu
School of Physical Science and Technology, & Inner Mongolia Key Lab of Microscale Physics and Atomic Manufacturing, Inner Mongolia University 1 , Hohhot 010021,
Wenyu Xing
School of Physical Science and Technology, and Inner Mongolia Key Lab of Microscale Physics and Atomic Manufacturing, Inner Mongolia University , Hohhot 010021,
Shifeng Zhao
School of Physical Science and Technology, & Inner Mongolia Key Laboratory of Microscale Physics and Atomic Manufacturing, Inner Mongolia University , Hohhot 010021, the Nei Monggol Autonomous Region,