Preparing method of KNN piezoelectric nanofiber flexible electricity generating element

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.

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...

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a preparation method of potassium sodium niobate piezoelectric nanofiber flexible power generation element, which aims to prepare KNN lead-free piezoelectric nanofiber on a rigid substrate in a large area by using electrospinning technology, and through Flexible polymers are used for graphic transfer and other related technologies to obtain a KNN nanofiber flexible piezoelectric power generation element that can be mass-produced and has high electrical output, which solves the problem of incompatibility between high-temperature treatment and flexible substrates during the synthesis and assembly of nanofibers

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