In:
Small, Wiley, Vol. 19, No. 28 ( 2023-07)
Abstract:
Polymer‐based nanocomposites are desirable materials for next‐generation dielectric capacitors. 2D dielectric nanosheets have received significant attention as a filler. However, randomly spreading the 2D filler causes residual stresses and agglomerated defect sites in the polymer matrix, which leads to the growth of an electric tree, resulting in a more premature breakdown than expected. Therefore, realizing a well‐aligned 2D nanosheet layer with a small amount is a key challenge; it can inhibit the growth of conduction paths without degrading the performance of the material. Here, an ultrathin Sr 1.8 Bi 0.2 Nb 3 O 10 (SBNO) nanosheet filler is added as a layer into poly(vinylidene fluoride) (PVDF) films via the Langmuir–Blodgett method. The structural properties, breakdown strength, and energy storage capacity of a PVDF and multilayer PVDF/SBNO/PVDF composites as a function of the thickness‐controlled SBNO layer are examined. The seven‐layered (only 14 nm) SBNO nanosheets thin film can sufficiently prevent the electrical path in the PVDF/SBNO/PVDF composite and shows a high energy density of 12.8 J cm −3 at 508 MV m −1 , which is significantly higher than that of the bare PVDF film (9.2 J cm −3 at 439 MV m −1 ). At present, this composite has the highest energy density among the polymer‐based nanocomposites under the filler of thin thickness.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202300526
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2168935-0
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