Enhanced energy storage property of plate-like Na0.5Bi4.5Ti4O15/poly(vinylidene fluoride) composites through texture arrangement |
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| Affiliation: | 1. School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inoganic Materials, Xi''an, 70021, People''s Republic of China;2. School of Electrical Informatica and Artificial Intelligence Shaanxi University of Science and Technology, Xi''an, 70021, People''s Republic of China;1. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, PR China;2. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, PR China;3. School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, PR China;4. School of Electrical Engineering, Dalian University of Technology, Dalian 116024, PR China;5. Department of Electrical Engineering, Tsinghua University, Beijing 100084, PR China;1. School of Advanced Materials Engineering, Changwon National University, Gyeongnam 641-773, Republic of Korea;2. Department of Physics, Changwon National University, Gyeongnam 641-773, Republic of Korea |
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| Abstract: | The plate-like Na0.5Bi4.5Ti4O15 (P-NBT4) particles were synthesized by molten salt method and dispersed in a poly (vinylindene fluoride) (PVDF) matrix. The alignment of P-NBT4 particles in PVDF matrix perpendicular to the direction of applied electric field could bring to impressive dielectric performance and breakdown strength to the composites. On the one hand, the excellent dielectric property of the P-NBT4/PVDF composites is ascribed to the high capacitance that is consist of P-NBT4 particles micro-capacitances. On the other hand, a higher breakdown strength of the P-NBT4/PVDF composites is owing to that strong barrier layer was formed in the composites by P-NBT4 particles alignment, which bring difficulty to form a conductive pathway. Moreover, the textured P-NBT4/PVDF composites exhibit a high energy density (9.45 J/cm3) and energy efficiency (η) of 52.28% under the critical electric field of 300 kV/mm. |
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| Keywords: | Textured composites Strong barrier layer Breakdown strength Energy density |
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