Preparing method of KNN piezoelectric nanofiber flexible electricity generating element

A potassium sodium niobate, nanofiber technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, fiber processing, heating/cooling fabrics, etc., can solve the problems of high temperature processing and incompatibility of flexible substrates

CN104409625AInactive Publication Date: 2015-03-11HUBEI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparing method of a potassium sodium niobate (KNN) piezoelectric nanofiber flexible electricity generating element. According to the method, the preparation of a KNN precursor is provided; KNN nanofiber is prepared in a large area by an electrostatic spinning method; and the KNN nanofiber transfer and the device assembly are carried out, and the KNN piezoelectric nanofiber flexible electricity generating element is obtained. The preparing method has the advantages that excellent lead-free piezoelectric materials are adopted; the KNN nanofiber is used for forming the flexible piezoelectric electricity generating element; the element can be enabled to have high electric output; the length-diameter ratio of the nanofiber prepared by the electrostatic spinning method is high; the nanofiber crystallization can be realized through sintering treatment; equipment and preparation processes are simple; the cost is low; the preparing method can be used for batch production of the elements; the mechanical deformation of the nanofiber under the specific external force effect can be improved through good flexibility of the element; and the collection efficient of the element on mechanical energy is improved.
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Description

technical field

[0001] The invention belongs to the technical field of low-dimensional piezoelectric nanometer materials and devices, and in particular relates to a method for preparing potassium sodium niobate piezoelectric nanofiber flexible power generation elements. Background technique

[0002] Piezoelectric materials have unique electromechanical energy conversion properties and have been widely used in sensors, actuators, and energy harvesting devices in recent years. With the development trend of device size miniaturization and integration, energy harvesting devices based on one-dimensional piezoelectric nanomaterials have attracted widespread attention, which can collect tiny mechanical vibration energy in the environment and convert it into electrical energy for micro The nano sensor system is powered to develop a self-driven micro-nano system.

[0003] For example, the research group of Professor Wang Zhonglin from the Georgia Institute of Technology used a flexi...

Examples

preparation example Construction

[0102] Such as figure 1 As shown, the preparation method of the potassium sodium niobate piezoelectric nanofiber flexible power generation element of the embodiment of the present invention comprises the following steps:

[0103] S101: Preparation of potassium sodium niobate (KNN) precursor;

[0104] S102: Prepare potassium sodium niobate nanofibers in large area by electrospinning method;

[0105] S103: Transfer and device assembly of potassium sodium niobate nanofibers.

[0106] Concrete steps of the present invention:

[0107] According to the embodiment of the present invention, a method for preparing a flexible piezoelectric power generation element based on potassium sodium niobate lead-free piezoelectric nanofibers, the steps of the flexible piezoelectric power generation element method are as follows:

[0108] Step 1: the preparation of potassium sodium niobate (KNN) precursor:

[0109] 1) Dissolve 0.1 to 0.2 parts by weight of potassium acetate and 0.15 to 0.3 pa...

Embodiment 1

[0157] Example 1: The preparation of a flexible piezoelectric power generation element based on potassium sodium niobate lead-free piezoelectric nanofibers, the steps of the preparation method are as follows:

[0158] Step 1: the preparation of potassium sodium niobate (KNN) precursor:

[0159] 1) Dissolve 0.12 parts by weight of potassium acetate and 0.16 parts by weight of sodium acetate trihydrate in a mixture of 4.0 parts by weight of ethylene glycol methyl ether and glacial acetic acid, the molar ratio of ethylene glycol methyl ether and glacial acetic acid is 5:1, and then drop Add 1.0 parts by weight of acetylacetone, and perform magnetic stirring for 10 hours after sealing to obtain solution A;

[0160] 2) Under the protection of dry nitrogen, dissolve 0.6 parts by weight of niobium ethylate in 4.0 parts by weight of ethylene glycol methyl ether and glacial acetic acid mixture, the molar ratio of ethylene glycol methyl ether and glacial acetic acid is 5:1, and then add...

Embodiment 2

[0179] Example 2: The preparation of a flexible piezoelectric power generation element based on potassium sodium niobate lead-free piezoelectric nanofibers, the steps of the preparation method are as follows:

[0180] Step 1: the preparation of potassium sodium niobate (KNN) precursor:

[0181] 1) Dissolve 0.12 parts by weight of potassium acetate and 0.16 parts by weight of sodium acetate trihydrate in a mixture of 4.0 parts by weight of ethylene glycol methyl ether and glacial acetic acid, the molar ratio of ethylene glycol methyl ether and glacial acetic acid is 5:1, and then drop Add 1.0 parts by weight of acetylacetone, and perform magnetic stirring for 10 hours after sealing to obtain solution A;

[0182] 2) Under the protection of dry nitrogen, dissolve 0.6 parts by weight of niobium ethylate in 4.0 parts by weight of ethylene glycol methyl ether and glacial acetic acid mixture, the molar ratio of ethylene glycol methyl ether and glacial acetic acid is 5:1, and then add...