Dielectric capacitors with high energy storage performances are exceedingly desired for the nextgeneration advanced high/pulsed power devices that demand miniaturization and integration.However,poor energy-storage den...Dielectric capacitors with high energy storage performances are exceedingly desired for the nextgeneration advanced high/pulsed power devices that demand miniaturization and integration.However,poor energy-storage density(U_(rec))and low efficiency(η)resulted from the large remanent polarization(P_(r))and low breakdown strength(BDS),have been the major challenge for the application of dielectric capacitors.Herein,a high-entropy strategy with superparaelectric relaxor ferroelectrics(SPRFE)was adopted to achieve extremely low Pr and high BDS in BaTiO_(3)system,simultaneously.Due to the high BDS~800 kV/cm and low Pr~0.58 mC/cm^(2),high-entropy SP-RFE(La_(0.05)Ba_(0.18)Sr_(0.18)K_(0.115)Na_(0.115)-Ca_(0.18)Bi_(0.18))TiO_(3)(LBSKNCBT)MLCCs exhibited high Urec~6.63 J/cm^(3)and excellent h~96%.What's more,LBSKNCBT MLCCs with high-entropy and SP-RFE characteristic also possess a good temperature and frequency stability.In a word,this work offers an excellent paradigm for achieving good energy-storage properties of BaTiO_(3)-based dielectric capacitors to meet the demanding requirements of advanced energy storage applications.展开更多
In this paper,a new transformation function was proposed for finding global minimizer of discrete optimization problems.We proved that under some general assumptions the new transformation function possesses the prope...In this paper,a new transformation function was proposed for finding global minimizer of discrete optimization problems.We proved that under some general assumptions the new transformation function possesses the properties of both the tunneling functions and the filled functions.Only one parameter was included in the proposed function,and it can be adjusted easily in the realization.Numerical results demonstrate the effectiveness of the proposed method.展开更多
基金supported by National Natural Science Foundation of China(No.52272104)Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(No.FRF-IDRY-21-002).
文摘Dielectric capacitors with high energy storage performances are exceedingly desired for the nextgeneration advanced high/pulsed power devices that demand miniaturization and integration.However,poor energy-storage density(U_(rec))and low efficiency(η)resulted from the large remanent polarization(P_(r))and low breakdown strength(BDS),have been the major challenge for the application of dielectric capacitors.Herein,a high-entropy strategy with superparaelectric relaxor ferroelectrics(SPRFE)was adopted to achieve extremely low Pr and high BDS in BaTiO_(3)system,simultaneously.Due to the high BDS~800 kV/cm and low Pr~0.58 mC/cm^(2),high-entropy SP-RFE(La_(0.05)Ba_(0.18)Sr_(0.18)K_(0.115)Na_(0.115)-Ca_(0.18)Bi_(0.18))TiO_(3)(LBSKNCBT)MLCCs exhibited high Urec~6.63 J/cm^(3)and excellent h~96%.What's more,LBSKNCBT MLCCs with high-entropy and SP-RFE characteristic also possess a good temperature and frequency stability.In a word,this work offers an excellent paradigm for achieving good energy-storage properties of BaTiO_(3)-based dielectric capacitors to meet the demanding requirements of advanced energy storage applications.
基金the National Natural Science Foundation of China(Nos.11471102 and 10971053).
文摘In this paper,a new transformation function was proposed for finding global minimizer of discrete optimization problems.We proved that under some general assumptions the new transformation function possesses the properties of both the tunneling functions and the filled functions.Only one parameter was included in the proposed function,and it can be adjusted easily in the realization.Numerical results demonstrate the effectiveness of the proposed method.
