气候变化领域集成服务门户(CCPortal): Phase-transition induced giant negative electrocaloric effect in a lead-free relaxor ferroelectric thin film

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DOI	10.1039/c9ee00269c
	Phase-transition induced giant negative electrocaloric effect in a lead-free relaxor ferroelectric thin film
	Peng B.; Zhang Q.; Gang B.; Leighton G.J.T.; Shaw C.; Milne S.J.; Zou B.; Sun W.; Huang H.; Wang Z.
发表日期	2019
ISSN	17545692
起始页码	1708
结束页码	1717
卷号	12 期号:5
英文摘要	Ferroelectric/antiferroelectric thin/thick films with large positive or negative electrocaloric (EC) effects could be very useful in designing commercial refrigeration devices. Here, a giant negative EC effect (maximum ΔT ∼ -42.5 K with ΔS ∼ -29.3 J K-1 kg-1) comparable to the best positive EC effects reported so far is demonstrated for 0.5(Ba0.8Ca0.2)TiO3-0.5Bi(Mg0.5Ti0.5)O3 (BCT-BMT) lead-free relaxor ferroelectric thin films prepared on Pt(111)/TiOx/SiO2/Si substrates using a sol-gel method. An electric-field induced structural phase transition (nanoscale tetragonal and orthorhombic to rhombohedral) along the out-of-plane [111] direction plays a very key role in developing the giant negative EC effect. This breakthrough will pave the way for practical applications of next-generation refrigeration devices with high cooling efficiency in one cycle by ingeniously utilizing and combining both the giant negative and positive EC effects. Moreover, a large energy density of 51.7 J cm-3 with a high power density of 1.15 × 1010 W kg-1 at room temperature is also achieved in the thin film, indicating that it is also an attractive multifunctional material for energy storage. © 2019 The Royal Society of Chemistry.
英文关键词	Commercial refrigeration; Electric fields; Ferroelectric films; Ferroelectric materials; Ferroelectric thin films; Ferroelectricity; Sol-gel process; Sol-gels; Cooling efficiency; Electric field induced; Electro-caloric effects; High power density; Lead-free relaxor; Multi-functional materials; Refrigeration devices; Structural phase transition; Thin films; electric field; film; induced response; instrumentation; phase transition
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189908
作者单位	Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China; Department of Applied Physics, Hong Kong Polytechnic University, Kowloon, Hong Kong; Department of Manufacturing and Materials, Cranfield University, Cranfield Bedfordshire, MK43 0AL, United Kingdom; College of Electronic and Optical Engineering and College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China; School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, United States
推荐引用方式 GB/T 7714	Peng B.,Zhang Q.,Gang B.,et al. Phase-transition induced giant negative electrocaloric effect in a lead-free relaxor ferroelectric thin film[J],2019,12(5).
APA	Peng B..,Zhang Q..,Gang B..,Leighton G.J.T..,Shaw C..,...&Wang Z..(2019).Phase-transition induced giant negative electrocaloric effect in a lead-free relaxor ferroelectric thin film.Energy & Environmental Science,12(5).
MLA	Peng B.,et al."Phase-transition induced giant negative electrocaloric effect in a lead-free relaxor ferroelectric thin film".Energy & Environmental Science 12.5(2019).