聚丙烯纳米复合电介质的陷阱分布特性与储能性能提升研究

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Abstract In order to explore the trap distribution characteristics of nanocomposite dielectrics and its mechanism of improving energy storage performance, three polypropylene nanocomposite dielectrics are prepared, and their physicochemical, dielectric and energy storage properties are tested. The test results show that the samples doped with boron nitride nanosheets have higher melting temperature, crystallinity, polarization strength, resistivity, breakdown strength and energy storage density. The experimental results show that the electric field dependence of pure polypropylene and nanocomposites conforms to the hopping conductance model under the exponential trap. The temperature dependence meets the Meyer-Neldel compensation rule, which indicates that the mechanism of exponential distribution trap in nanocomposite dielectric is the same as that of matrix. The fitting results show that nano-doping mainly changes the deepest trap energy in the composites, which is proportional to the crystallinity. The mechanism of increasing trap energy level and energy storage density is explained based on fringed microbeam model. This indicates that the ordered and tight interfacial region of the nanocomposites will restrict the movement of molecules, thus hindering charge transport and energy accumulation, which will improve the resistivity and breakdown strength of the material, and finally realize the improvement of energy storage performance.

Key words： polypropylene nanocomposites conductivity trap distribution characteristic break- down strength energy storage performance

Received: 24 June 2023

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	Articles by authors
	ZHANG Yuanshuo
	MIN Daomin
	GAO Ziwei
	ZHU Yuanwei
	WANG Shihang

Cite this article:

ZHANG Yuanshuo,MIN Daomin,GAO Ziwei等. Study on trap distribution characteristics and energy storage performance improvement of polypropylene nanocomposites[J]. Electrical Engineering, 2023, 24(9): 11-19.

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http://dqjs.cesmedia.cn/EN/Y2023/V24/I9/11

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