Friction layer for improving electrical properties of nano-generator by utilizing composite interlayer and preparation method thereof
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A technology of nanogenerator and friction layer, which is applied in the direction of tribogenerator and coating, can solve the problems that the tribogenerator needs to be further improved, and achieve the effect of improving output performance, realizing output performance and high output performance
Pending Publication Date: 2020-09-08
INNER MONGOLIA UNIV OF SCI & TECH
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[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 remane
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[0017] A method for preparing a friction layer using a composite interlayer to improve the electrical performance of a nanogenerator, comprising the steps of:
[0018] 1) Dissolve 1g of diaminodiphenyl ether and 1.09g of pyromellitic anhydride in 25ml of dimethylformamide, add a certain mass fraction of sodium bismuth titanate-strontium titanate micron ceramic particles, and stir for 12 hours to obtain titanium-containing Sodium bismuth acid-strontium titanate ceramic particles and a solid-liquid mixture of polyimide precursors;
[0019] 2) Electrostatically atomize the solid-liquid mixture obtained in step 1), apply a voltage of 10kV~20kV, and receive a distance of 8cm to obtain a composite film precursor;
[0020] 3) The composite film precursor obtained in step 2) was hot-pressed at 60MPa and 80°C for 2h, kept at 100°C for 1h, kept at 150°C for 1h, kept at 200°C for 2h, kept at 250°C for 2h, and finally kept at 300°C 2h, polyimide@sodium bismuth titanate-strontium titanate...
Example Embodiment
[0022] Example 1
[0023] 1) Dissolve 1g of diaminodiphenyl ether and 1.09g of pyromellitic anhydride in 25ml of dimethylformamide, add a certain mass fraction of sodium bismuth titanate-strontium titanate micron ceramic particles, and stir for 12 hours to obtain titanium-containing Sodium bismuth acid-strontium titanate ceramic particles and a solid-liquid mixture of polyimide precursors;
[0024] 2) Electrostatically atomize the solid-liquid mixture obtained in step 1), apply a voltage of 15kV, and receive a distance of 8cm to obtain a composite film precursor;
[0025] 3) The composite film precursor obtained in step 2) was hot-pressed at 60MPa and 80°C for 2h, kept at 100°C for 1h, kept at 150°C for 1h, kept at 200°C for 2h, kept at 250°C for 2h, and finally kept at 300°C 2h, polyimide@bismuth sodium titanate-strontium titanate composite interlayer was obtained, and the mass fraction of bismuth sodium titanate-strontium titanate micron ceramic particles in the composite i...
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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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