All-organic PVDF-based composite films with high energy density and efficiency synergistically tailored by MMA- co-GMA copolymer and cyanoethylated cellulose

Junhao Xie; Xuanchen Zhao; Shuo Zheng; Shaoyuan Zhong; Xiaomeng Liu; Mingyao Zhang; Shulin Sun

doi:10.1039/d3cp03007e

All-organic PVDF-based composite films with high energy density and efficiency synergistically tailored by MMA- co-GMA copolymer and cyanoethylated cellulose

Phys Chem Chem Phys. 2023 Aug 16;25(32):21307-21316. doi: 10.1039/d3cp03007e.

Authors

Junhao Xie^{1

2}, Xuanchen Zhao^{1

2}, Shuo Zheng^{1

2}, Shaoyuan Zhong^{1

2}, Xiaomeng Liu^{1

2}, Mingyao Zhang^{1

2}, Shulin Sun^{1

2}

Affiliations

¹ School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China. zmy@mail.ccut.edu.cn.
² Engineering Research Center of Synthetic Resin and Special Fiber, Ministry of Education, Changchun University of Technology, Changchun 130012, China.

PMID: 37552168
DOI: 10.1039/d3cp03007e

Abstract

All-organic polymer dielectric films have been widely used for different electrical devices in recent years. However, their development is impeded by low U_e and large device volume. In the present paper, polyvinylidene fluoride (PVDF) composite dielectric materials, with high energy density (U_e) and energy efficiency (η), were prepared through the synergistic effect of a new MMA-co-GMA (MG) copolymer and cyanoethylated cellulose. MG was miscible with PVDF, which reduced the dielectric loss (tan δ) and improved the η of PVDF due to the linear structure and the hydrogen bonding interaction with the epoxy groups for MG. To further enhance the U_e of the dielectric films, cyanoethylated cellulose (CR-C) was added as a third component into the PVDF composite matrix to improve the U_e. The deep trap effect of hydrogen bonds between PVDF/MG and CR-C improved the electric breakdown strength (E_b) of the three-phase composite films from 440 MV m^-1 to 640 MV m^-1. Moreover, the high polarization of cyanoethylated cellulose can significantly improve the U_e (24.43 J cm^-3) of the three-phase composite dielectric film, and the efficiency can be maintained above 75% at 640 MV m^-1. This research provides a new idea for the manufacturing of homogeneous and stable all-organic PVDF dielectric composite films based on the hydrogen bonding construction strategy.