A Facile In Situ Surface-Functionalization Approach to Scalable Laminated High-Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance

Dong，Jiufeng1; Hu，Renchao2; Xu，Xinwei1; Chen，Jie1; Niu，Yujuan2; Wang，Feng2; Hao，Jianyu1; Wu，Kai3; Wang，Qing4; Wang，Hong2

2021

10.1002/adfm.202102644

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

High-temperature dielectric materials for capacitive energy storage are in urgent demand for modern power electronic and electrical systems. However, the drastically degraded energy storage capabilities owing to the inevitable conduction loss severely limit the utility of dielectric polymers at elevated temperatures. Herein, a new approach based on the in situ preparation of oxides onto polyimide (PI) films to high-temperature laminated polymer dielectrics is described. As confirmed by computational simulations, the charge injection at the electrode/dielectric interface and electrical conduction in dielectric films are substantially depressed via engineering the in situ prepared oxide layer in the laminated composites. Consequently, ultrahigh dielectric energy densities and high efficiencies are simultaneously achieved at elevated temperatures. Especially, an excellent energy density of 1.59 J cm at a charge–discharge efficiency of above 90% has been achieved at 200 °C, outperforming the current dielectric polymers and composites. Together with its excellent discharging capability and cyclic reliability, the laminate-structured film is demonstrated to be a promising class of polymer dielectrics for high-power energy storage capacitors operating at elevated temperatures. The facile preparation method reported herein is readily adaptable to a variety of polymer thin films for energy applications under extreme environments.

dielectric capacitors high temperature performance laminated structures oxides surface functionalization

SCI ; EI

英语

NI期刊

通讯

WOS:000657636400001

20212310456399

Composite structures ; Dielectric devices ; Dielectric films ; Energy storage ; Laminated composites ; Laminating ; Oxide films ; Polymer films ; Storage (materials) ; Thin films

Structural Members and Shapes:408.2 ; Energy Storage:525.7 ; Storage:694.4 ; Dielectric Materials:708.1 ; Polymeric Materials:815.1 ; Processing of Plastics and Other Polymers:816.1

MATERIALS SCIENCE

2-s2.0-85107156376

Scopus

1.State Key Laboratory for Mechanical Behavior of Materials,School of Electronic and Information Engineering,Xi'an Jiaotong University,Xi'an,710049,China
2.Department of Materials Science and Engineering and Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China
3.State Key Lab. of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi'an,710049,China
4.Department of Materials Science and Engineering,The Pennsylvania State University,University Park,16802,United States

Dong，Jiufeng,Hu，Renchao,Xu，Xinwei,et al. A Facile In Situ Surface-Functionalization Approach to Scalable Laminated High-Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance[J]. ADVANCED FUNCTIONAL MATERIALS,2021,31.

Dong，Jiufeng.,Hu，Renchao.,Xu，Xinwei.,Chen，Jie.,Niu，Yujuan.,...&Wang，Hong.(2021).A Facile In Situ Surface-Functionalization Approach to Scalable Laminated High-Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance.ADVANCED FUNCTIONAL MATERIALS,31.

Dong，Jiufeng,et al."A Facile In Situ Surface-Functionalization Approach to Scalable Laminated High-Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance".ADVANCED FUNCTIONAL MATERIALS 31(2021).