High Energy Density in layered 2D Nanomaterial based Polymer Dielectric Films
Authors:
Maninderjeet Singh,
Priyanka Das,
Pabitra Narayan Samanta,
Sumit Bera,
Ruskshan Tanthirige,
Brian Shook,
Roshanak Nejat,
Banarji Behera,
Qiqi Zhang,
Qilin Dai,
Avijit Pramanik,
Paresh Ray,
Dharmaraj Raghavan,
Jerzy Leszczysnki,
Alamgir Karim,
Nihar R. Pradhan
Abstract:
Dielectric capacitors are critical components in electronics and energy storage devices. The polymer based dielectric capacitors have advantages of flexibility, fast charge and discharge, low loss, and graceful failure. Elevating the use of polymeric dielectric capacitors for advanced energy applications such as electric vehicles (EVs) however requires significant enhancement of their energy densi…
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Dielectric capacitors are critical components in electronics and energy storage devices. The polymer based dielectric capacitors have advantages of flexibility, fast charge and discharge, low loss, and graceful failure. Elevating the use of polymeric dielectric capacitors for advanced energy applications such as electric vehicles (EVs) however requires significant enhancement of their energy densities. Here, we report a polymer thin film heterostructure based capacitor of poly(vinylidene fluoride)/poly(methyl methacrylate) with stratified 2D nanofillers (Mica or h-BN nanosheets) (PVDF/PMMA-2D fillers/PVDF), that shows enhanced permittivity, high dielectric strength and an ultra-high energy density of 75 J/cm3 with efficiency over 79%. Density functional theory calculations verify the observed permittivity enhancement. This approach of using oriented 2D nanofillers based polymer heterostructure composites is expected to be universal for designing high energy density thin film polymeric dielectric capacitors for myriads of applications.
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Submitted 16 November, 2023; v1 submitted 6 March, 2023;
originally announced March 2023.