Method for improving breakdown strength and energy storage density of polymer

A technology of breakdown strength and energy storage density, applied in the field of energy storage materials, can solve the problems of the decrease of the breakdown strength of the composite, the decrease of the dielectric constant of the composite, the concentration of the electric field, etc., and meet the requirements of reducing microstructure defects and equipment conditions. Low, weakening effect of the tendency to agglomerate
CN107903441AActive Publication Date: 2018-04-13SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2018-04-13

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Abstract

The invention relates to the technical field of energy storage materials, and in particular relates to a method for improving the breakdown strength and energy storage density of a polymer. The methodfor improving the breakdown strength and energy storage density of the polymer comprises the following steps: adding 2-14 parts by weight of hydroxylated hexagonal boron nitride to 100 parts by weight of the polymer. The modified product of BNNSs (hexagonal boron nitride nanosheets) provided by the invention has better dispersion effects in the polymer, so that the agglomeration tendency of the BNNSs in the polymer is greatly weakened, and the method is very beneficial for the improvement of the breakdown strength and energy storage density of a composite capacitor.
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Description

technical field

[0001] The invention relates to the technical field of energy storage materials, in particular to a method for improving the breakdown strength and energy storage density of polymers. Background technique

[0002] Dielectric capacitors are attractive for energy storage due to their ultrahigh charge-discharge rates. Compared with traditional ceramic capacitors, polymer dielectric materials have the advantages of easy processing, light weight, low cost and good flexibility. However, the relatively low energy density greatly limits its application in modern electronic devices that are integrated, lightweight, and miniaturized. For example, the most advanced commercial film capacitor, biaxially oriented polypropylene film (BOPP), has an energy storage density of only 2.2 J cm -3 . Therefore, a new generation of high energy density capacitors has gained more and more attention.

[0003] Theoretically, the energy storage density of dielectric materials depends o...

Claims

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