High energy storage performance composite films prepared by coprecipitation-hot pressing technique

doi:10.19936/j.cnki.2096-8000.20240328.014

Abstract

Abstract: High energy storage performance capacitors have received widespread attention in the fields of onboard inverter, photovoltaic power generation, and aircraft carrier ejection systems due to their ultrafast charging-discharging speed and ultrahigh power density. Enhancing the energy storage density (U_e) can accelerate the integration and promote the rapid development of power electronics devices. Here, P(VDF-CTFE) is used as the matrix and linear homopolymer PMMA is used as the filler to limit the crystallization and ferroelectric phase transition, and coprecipitation-hot pressing is used instead of the solution casting method to achieve the homogeneity of the structure. It shows PMMA can be uniformly distributed in P(VDF-CTFE) and limit the ferroelectric relaxation loss, the phase field simulation analysis shows that the uniformly distributed PMMA can optimize the electric field distribution, and the U_e of 10.1 J/cm³ with the charge-discharge efficiency (η) of 74% are obtained under the electric field of 372 MV/m at 20vol% filling, which provides scientific and technological support for the practicalization of high energy storage composite dielectric films.

Key words: P(VDF-CTFE), PMMA, energy loss, energy storage density, composites

CLC Number:

TB332

WANG Yao, SHAO Dandan, LEI Bingyu. High energy storage performance composite films prepared by coprecipitation-hot pressing technique[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(3): 97-102.

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