Strongly polarizable nanodomains enable excellent energy storage performance at moderate electric fields in lead-free Bi_(0.5)Na_(0.5)TiO_(3)-based ceramicsOA
The simultaneous achievement of high recoverable energy storage density(Wrec)and high efficiency(η)under moderate electric fields remains a critical challenge for dielectric ceramic capacitors in modern electronic systems,despite their ultrahigh power density and rapid chargedischarge capabilities.Here,we propose a strategy to construct strongly polarizable nanodomains,enabling excellent energy storage performance(ESP)under moderate electric fields in Bi_(0.5)Na_(0.5)TiO_(3)(BNT)-based ceramics.Compositional modulation by multiple cations,together with a regulative proportion of rhombohedral(R)and tetragonal(T)phases,enhances random fields,weakens interdomain interactions,forms strongly polarizable nanodomains,and elevates the breakdown strength(Eb)without sacrificing the intrinsic high polarity of the matrix.Consequently,the optimized 0.98(BNSB)0.985S0.01T-0.02CMN ceramic exhibits an ultrahigh maximum polarization(Pmax)of 65.8μC/cm^(2),with slim polarization-electric(P-E)field loops.Owing to these features,the optimized bulk ceramic achieves a record Wrec of 6.11 J/cm^(3)and an impressiveηof 86%at an Eb of 330 kV/cm.Moreover,this sample also presents outstanding temperature/frequency stability and charging-discharging performance.These findings suggest that the(BNSB)1-1.5ySyT-0.02CMN component has immense potential for advanced pulse power capacitors under a moderate applied electric field and further offers a valid avenue for exploring high-performance lead-free dielectric materials.
Wanjin Li;Pu Mao;Xinyang Zhao;Ting Wang;Tianyu Li;Yahui Tian;Zhiyong Liu;Bing Xie;Kun Guo;Jinghui Gao
Jiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment,School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330603,ChinaJiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment,School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330603,China State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,ChinaJiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment,School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330603,ChinaGuangdong Provincial Key Laboratory of Electronic Functional Materials and Devices,Huizhou University,Huizhou 516001,ChinaSchool of Materials Science and Engineering,University of Science and Technology,Beijing 100083,ChinaSchool of Information Engineering,Jiangxi University of Technology,Nanchang 330098,ChinaJiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment,School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330603,ChinaJiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment,School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330603,ChinaJiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment,School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330603,ChinaState Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China
化学化工
Bi_(0.5)Na_(0.5)TiO_(3)-based lead-free ceramicsmultiphase designstrongly polarizable nanodomainsenergy storage performanceultrahigh polarization
《Journal of Advanced Ceramics》 2026 (5)
P.163-174,12
financially supported by the National Natural Science Foundation of China(Nos.52202136 and 52562019)the Natural Science Foundation of Jiangxi Province(No.20232BAB204017)the State Key Laboratory of Electrical Insulation and Power Equipment(No.EIPE24203)the Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices(No.EFMD2024002Z)the China National Postdoctoral Program for Innovative Talents(No.BX20240035)the China Postdoctoral Science Foundation(No.2024M760202)the Graduate Innovation Special Fund of Jiangxi Province(No.YC2024-S607).
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