Aliovalent Sm-doping enables BNT-based realxor ferroelectric ceramics with>90%energy efficiency  

作　　者：Dong-Xu Li Wei Deng Zong-Yang Shen Zhipeng Li Xiaojun Zeng Xuhai Shi You Zhang Wenqin Luo Fusheng Song Chao-Feng Wu 

机构地区：[1]Jiangxi Key Laboratory of Advanced Ceramic Materials,China National Light Industry Key Laboratory of Functional Ceramic Materials,School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China [2]Research Center for Advanced Functional Ceramics,Wuzhen Laboratory,Jiaxing 314500,China [3]Ceramic Research Institute of Light Industry of China,Jingdezhen 333000,China [4]Center of Advanced Ceramic Materials and Devices,Yangtze Delta Region Institute of Tsinghua University,Jiaxing 314006,China

出　　处：《Journal of Advanced Ceramics》2024年第12期2043-2050,共8页先进陶瓷(英文)

基　　金：supported by the National Natural Science Foundation of China(No.52267002);the Natural Science Foundation of Jiangxi Province(No.20212ACB204010);the Science&Technology Research Project of Jiangxi Provincial Education Department(No.GJJ211301).

摘　　要：Dielectric capacitors,as physical powers,are critical components of advanced electronics and pulse power systems.However,achieving high energy efficiency without sacrificing recoverable energy density remains a challenge for most dielectric materials.In this work,the aliovalent Sm^(3+)doped Ba_(0.12)Na_(0.3)Bi_(0.3)Sr_(0.28)TiO_(3)(BNBST)relaxor ferroelectric at the A site was used to design a defect-induced phase/domain structure to improve polarization switching.A high energy efficiency of 91%,together with a recoverable energy density of 2.1 J/cm^(3),was achieved in Sm_(0.07)–BNBST ceramics at a low electric field of 114 kV/cm,exceeding those of other dielectric materials under the same electric field.In addition,Sm_(0.07)–BNBST ceramics exhibit good energy storage stability and endurance and fast charging‒discharging speeds,demonstrating their great potential in electrostatic capacitor applications.This work provides an approach to achieve highperformance dielectrics through aliovalent rare earth doping and builds a close relationship between the defect-engineered phase/domain structure and polarization switching for energy storage.

关 键 词：energy storage ceramics relaxor ferroelectrics aliovalent doping (Bi_(05)Na_(0.5))TiO_(3)(BNT) pulse power 

分 类 号：TQ1[化学工程]