Synergically improved energy storage performance and stability in sol-gel processed BaTiO3/(Pb,La,Ca)TiO3/BaTiO3 tri-layer films with a crystalline engineered sandwich structure

被引:9
作者
Liu, Jinpeng [1 ]
Wang, Ying [1 ]
Zhu, Hanfei [1 ]
Luo, Hongyu [1 ]
Zhai, Xiao [2 ]
Huan, Yu [3 ]
Yan, Jing [4 ]
Wang, Kun [5 ]
Liu, Chao [1 ]
Cheng, Hongbo [1 ]
Ouyang, Jun [1 ,6 ]
机构
[1] Qilu Univ Technol, Sch Chem & Chem Engn, Shandong Acad Sci, Jinan 250353, Peoples R China
[2] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China
[3] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
[4] Qilu Normal Univ, Coll Phys & Elect Engn, Jinan 250200, Peoples R China
[5] China Tobacco Shandong Ind Co Ltd, Jinan 250014, Peoples R China
[6] Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Key Film Mat & Applicat Equipments Hunan, Hunan Prov Key Lab Thin Film Mat & Devices, Xiangtan 411105, Peoples R China
来源
JOURNAL OF ADVANCED CERAMICS | 2023年 / 12卷 / 12期
基金
中国国家自然科学基金;
关键词
energy storage; sandwich film; amorphous structure; nanocrystal cluster; stability; FERROELECTRIC THIN-FILMS; PHASE-TRANSITION; DENSITY; CAPACITORS; ENHANCEMENT; BEHAVIOR;
D O I
10.26599/JAC.2023.9220821
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Achieving an excellent energy storage performance, together with high cycling reliability, is desirable for expanding technological applications of ferroelectric dielectrics. However, in well-crystallized ferroelectric materials, the concomitant high polarizability and low polarization-saturation field have led to a square-shaped polarization-electric field loop, fatally impairing both recoverable energy density (W-rec) and efficiency (eta). Nanocrystalline ferroelectric films with a macroscopically amorphous structure have shown an improved Wrec and., but their much lower polarizability demands an extremely high electric field to achieve such performances, which is undesirable from an economic viewpoint. Here, we propose a strategy to boost the energy storage performances and stability of ferroelectric capacitors simultaneously by constructing a tri-layer film in which a well-crystallized ferroelectric layer was sandwiched by two pseudo-linear dielectric layers with a dominant amorphous structure. In sol-gel-derived BaTiO3/(Pb,La,Ca)TiO3/BaTiO3 (BTO/ PLCT/BTO) tri-layer films, we show that the above design is realized via rapid thermal annealing which fully crystallized the middle PLCT layer while left the top/bottom BTO cap layers in a poor crystallization status. This sandwiched structure is endowed with an enhanced maximum polarization while a small remnant one and a much-delayed polarization saturation, which corresponds to large W-rec approximate to 80 J/cm(3) and high eta approximate to 86%. Furthermore, the film showed an outstanding cycling stability: its Wrec and. remain essentially unchanged after 109 electric cycles (Delta W/W < 4%, Delta eta/eta < 2%). These
引用
收藏
页码:2300 / 2314
页数:15
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