Friction layer for improving electrical properties of nano-generator by utilizing composite interlayer and preparation method thereof

Abstract

The invention discloses a friction layer for improving the electrical performance of a nano-generator by using a composite interlayer and a preparation method thereof. The introduced dielectric interlayer enables the charge storage capacity of polyimide and the residual polarization generation capacity of a ferroelectric material to be coupled together, and the output performance of the obtained friction nano-generator is effectively improved; compared with a friction nano-generator without a polyimide@sodium bismuth titanate-strontium titanate composite interlayer, the output performance of the friction nano-generator provided by the invention is 3.20 times that of the friction nano-generator; compared with a friction nano-generator only containing a polyimide (PI) interlayer, the outputperformance of the friction nano-generator provided by the invention is 2.14 times that of the friction nano-generator only containing a polyimide (PI) interlayer; compared with a friction nano-generator with an excessive polyimide@sodium bismuth titanate-strontium titanate composite interlayer, the friction nano-generator provided by the invention has the output performance that is 1.38 times that of the friction nano-generator with an excessive polyimide@sodium bismuth titanate-strontium titanate composite interlayer; according to the invention, development and construction of a theoreticalsystem of the friction nano-generator are facilitated, and a simple and novel mode is provided to realize high output performance.

Description

technical field [0001] The invention relates to the technical field of friction nano power generation, in particular to a friction layer for improving the electrical performance of a nano generator by using a composite interlayer and a preparation method thereof. Background technique [0002] In the past few years, triboelectric nanogenerators have achieved rapid development; triboelectric nanogenerators combine frictional electricity generation and electrostatic induction effects, and can directly convert low-frequency mechanical energy in complex environments into electrical energy, and then pass through rectification circuits or storage Based on the above advantages, triboelectric nanogenerators are widely used in human-computer interaction, electronic skin, biomedicine and other fields; therefore, it is very important to improve the output performance of triboelectric nanogenerators. [0003] A large number of works have shown that the existence of sandwich structures ca...

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Problems solved by technology

[0003] A large number of works have shown that the existence of sandwich structures can effectively improve the output performance of triboelectric nanogenerators; for example, a paper published in "NanoEnergy" Volume 38, Pages 467–476 in 2017 pointed out that polyimide interlayers can be used as charge storage layers , to effectively improve the output performance of the corresponding triboelectric nanogenerator; in addition, a paper published in Volume 8, Issue 88 of "Nature Communications" in 2017 pointed out that the use of ferroelectric materials as interlayers can effectively combine the remanent polarization produced by ferroelectric materials with the The electrostatic charges on the surface of the friction layer are coupled together; however, for the continued prospects of the triboelectric nanogenerator, there are still many deficiencies in the current research work, and the output electrical performance of the triboelectric nanogenerator needs to be further improved; by introducing a dielectric Interlayer and further combining the energy storage effect of polyimide with the bound charge generated by the remanent polarization of ferroelectric materials will be a good research direction

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