材料科学
铁电性
纳米晶材料
电介质
无定形固体
极化(电化学)
储能
磁滞
动能
纳米结构
复合材料
光电子学
凝聚态物理
纳米技术
功率(物理)
热力学
结晶学
物理
量子力学
物理化学
化学
作者
Mahesh Peddigari,Bo Wang,Rui Wang,Woon‐Ha Yoon,Jongmoon Jang,Hyun‐Jong Lee,Kyung Song,Geon‐Tae Hwang,Kai Wang,Yuchen Hou,Haribabu Palneedi,Yongke Yan,Han Seung Choi,Jianjun Wang,Aravindkrishna Talluri,Lei Chen,Shashank Priya,Dae‐Yong Jeong,Jungho Ryu
标识
DOI:10.1002/adma.202302554
摘要
Relaxor ferroelectrics (RFEs) are being actively investigated for energy-storage applications due to their large electric-field-induced polarization with slim hysteresis and fast energy charging-discharging capability. Here, a novel nanograin engineering approach based upon high kinetic energy deposition is reported, for mechanically inducing the RFE behavior in a normal ferroelectric Pb(Zr0.52 Ti0.48 )O3 (PZT), which results in simultaneous enhancement in the dielectric breakdown strength (EDBS ) and polarization. Mechanically transformed relaxor thick films with 4 µm thickness exhibit an exceptional EDBS of 540 MV m-1 and reduced hysteresis with large unsaturated polarization (103.6 µC cm-2 ), resulting in a record high energy-storage density of 124.1 J cm-3 and a power density of 64.5 MW cm-3 . This fundamental advancement is correlated with the generalized nanostructure design that comprises nanocrystalline phases embedded within the amorphous matrix. Microstructure-tailored ferroelectric behavior overcomes the limitations imposed by traditional compositional design methods and provides a feasible pathway for realization of high-performance energy-storage materials.
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