Dielectric ultracapacitors based on columnar nano-grained ferroelectric oxide films with gradient phases along the growth direction

Song, Chuanqi1; Zheng, Feifan1; Zhang, Yuan2; Cheng, Hongbo1; Teng, Long1,3; Wang, Kun4; Zhu, Hanfei1; Liu, Chao1; Wang, Li1; Liang, Zhengyan1; Ouyang, Jun1,3

2024-07-01

10.26599/JAC.2024.9220920

JOURNAL OF ADVANCED CERAMICS   影响因子和分区

2226-4108

2227-8508

In this work, dielectric ultracapacitors were designed and fabricated using a combination of phase boundary and nanograin strategies. These ultracapacitors are based on submicron-thick Ba(Zr0.2Ti0.8)O-3 ferroelectric films sputter-deposited on Si at 500 degrees C. With a composition near a polymorphic phase boundary (PPB), a compressive strain, and a high nucleation rate due to the lowered deposition temperature, these films exhibit a columnar nanograined microstructure with gradient phases along the growth direction. Such a microstructure presents three-dimensional polarization inhomogeneities on the nanoscale, thereby significantly delaying the saturation of the overall electric polarization. Consequently, a pseudolinear, ultraslim polarization (P)-electric field (E) hysteresis loop was obtained, featuring a high maximum applicable electric field (similar to 5.7 MV/cm), low remnant polarization (similar to 5.2 mu C/cm(2)) and high maximum polarization (similar to 92.1 mu C/cm(2)). This P-E loop corresponds to a high recyclable energy density (W-rec similar to 208 J/cm(3)) and charge-discharge efficiency (similar to 88%). An in-depth electron microscopy study revealed that the gradient ferroelectric phases consisted of tetragonal (T) and rhombohedral (R) polymorphs along the growth direction of the film. The T-rich phase is abundant near the bottom of the film and gradually transforms into the R-rich phase near the surface. These films also exhibited a high Curie temperature of similar to 460 degrees C and stable capacitive energy storage up to 200 degrees C. These results suggest a feasible pathway for the design and fabrication of high-performance dielectric film capacitors.

ferroelectric thin films energy storage phase coexistence nanograin silicon

SCI ; EI

英语

其他

Natural Science Foundation of Shandong Province["ZR2022ZD39","ZR2022ME031","ZR2023QB119","ZR2023QE138","ZR2020QE042","ZR2022QB138"] ; National Natural Science Foundation of China[52002192] ; Science, Education and Industry Integration Pilot Projects of Qilu University of Technology (Shandong Academy of Sciences)["2022GH018","2023PX062","2023PX041"] ; Training Plan Project of Qilu University of Technology["2023RCKY093","2023RCKY095"] ; Jinan City Science and Technology Bureau[2021GXRC055] ; Education Department of Hunan Province/Xiangtan University[KZ0807969]

Materials Science

Materials Science, Ceramics

WOS:001283011500004

TSINGHUA UNIV PRESS

Web of Science

1.Qilu Univ Technol, Shandong Acad Sci, Inst Adv Energy Mat & Chem, Sch Chem & Chem Engn, Jinan 250353, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Key Film Mat & Applicat Equipment Hunan Pr, Xiangtan 411105, Peoples R China
4.China Tobacco Shandong Ind Co Ltd, Jinan 250104, Peoples R China

Song, Chuanqi,Zheng, Feifan,Zhang, Yuan,et al. Dielectric ultracapacitors based on columnar nano-grained ferroelectric oxide films with gradient phases along the growth direction[J]. JOURNAL OF ADVANCED CERAMICS,2024,13(7).

Song, Chuanqi.,Zheng, Feifan.,Zhang, Yuan.,Cheng, Hongbo.,Teng, Long.,...&Ouyang, Jun.(2024).Dielectric ultracapacitors based on columnar nano-grained ferroelectric oxide films with gradient phases along the growth direction.JOURNAL OF ADVANCED CERAMICS,13(7).

Song, Chuanqi,et al."Dielectric ultracapacitors based on columnar nano-grained ferroelectric oxide films with gradient phases along the growth direction".JOURNAL OF ADVANCED CERAMICS 13.7(2024).