Yu Shuhui, researcher of Shenzhen Advanced Institute of Chinese Academy of Sciences and sun Rong's research team have made new progress in the field of dielectric energy storage materials

Recently, researchers Yu Shuhui and sun Rong from the Institute of advanced materials science and engineering, Shenzhen Institute of advanced technology, Chinese Academy of sciences have made new progress in the field of dielectric energy storage materials In this study, through the design of the filler particles, the barium titanate (BT) particles with high dielectric constant are combined with the boron nitride nano sheet (bnns) with high breakdown strength and high thermal conductivity to form composite particles with special structure, which can significantly improve the breakdown strength and dielectric energy storage performance of the composite after being combined with the polymer Relevant papers were published in the authoritative journal advanced energy materials (DOI: 10.1002/aenm.201803204 ）。 Senior engineer Luo Suibin is the first author, researcher Yu Shuhui and researcher sun Rong are the corresponding authors Dielectric energy storage technology has been widely used in modern electronic power industry, such as wearable electronics, hybrid electric vehicle, weapon system and so on, because of its fast energy conversion rate, long working time and friendly environment With the development of miniaturization and high performance of electronic devices, dielectric materials with high energy storage density are urgently needed For this reason, the research team mixed and filtered the dispersions of bnns and BT nanoparticles, and treated them at a higher temperature To a certain extent, the melted bnns tightly covered BT particles to form composite particles BT @ BN Combined with the high insulating property of boron nitride and the high dielectric constant of barium titanate, the space charge density and current density of PVDF composite are reduced, and the polarization of barium titanate is enhanced, so that the breakdown strength (1.76 times of PVDF matrix) and potential shift (9.3 μ C / cm 2 at 580 kV / mm) are significantly increased, and the high energy storage density (17.6 J / cm 3) is obtained, 2.8 times of PVDF matrix) The research work has been supported by NSFC, Ministry of science and technology, Guangdong Province Industry University Research Institute, advanced academy and other projects.