Electrostatic Energy Harvester Using Poling to Amplify Charge

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Solution Overview

Problem

Conventional electrostatic energy harvesters rely heavily on structural or material surface shape control rather than material selection for improving power, limiting their efficiency in converting friction-generated energy.

Innovation Solution

An electrostatic energy harvester utilizing a ferroelectric material layer and a friction-charged body with opposite charging characteristics, where the ferroelectric material layer is poled to enhance the electric charge difference generated by friction, allowing for improved power amplification through controlled poling techniques.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional electrostatic energy harvesters use structural or material surface shape control to improve power, then power output is enhanced, but the conversion efficiency of friction-generated energy is limited

Engineering Contradiction:

Improvepower outputVSAvoidconversion efficiency

Core Design Contradiction:

PowerVSUse of energy by moving object

Solution Approach 1:

The patent applies parameter changes by utilizing the ferroelectric material's ability to change its electric properties through poling. By controlling the poling process, the material's electric susceptibility and charge characteristics are modified to optimize both power output and energy conversion efficiency, resolving the contradiction between the two parameters

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material structure combining ferroelectric material with friction-charged body materials. This composite approach allows the system to simultaneously achieve high power output through the ferroelectric properties and high conversion efficiency through the triboelectric effect, as each material contributes its optimal characteristics to the energy harvesting process

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If material selection is not prioritized in conventional electrostatic energy harvesters, then structural control becomes the primary method for improvement, but this limits the maximum achievable power

Engineering Contradiction:

Improvestructural control simplicityVSAvoidpower output

Core Design Contradiction:

Ease of manufactureVSPower

Solution Approach 1:

The patent utilizes parameter changes in the ferroelectric material through poling to achieve high power output. By changing the material's electric parameters rather than relying solely on structural modifications, the system achieves superior power while maintaining manufacturing simplicity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces mechanical/structural control methods with an electric field-based approach using ferroelectric poling. Instead of modifying structural parameters to improve power, the invention uses electric field application to change material properties, achieving higher power with simpler structural requirements

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution significantly enhances the power output of the energy harvester by amplifying the electric charge difference caused by friction, surpassing the limitations of conventional designs that focus on structural or material surface shape control.

Implementation Method 1

an electrostatic energy harvester which controls friction-generated electrostatic characteristics using an electric potential generated by ferroelectric characteristics of a material

Methodology Applied

Scientific EffectFerroelectric effect:

Implementation Method 2

The friction-charged body generates triboelectricity when the friction-charged body is separated from the ferroelectric material layer and the friction-charged body is in contact with the ferroelectric material layer

Methodology Applied

Scientific EffectTriboelectric effect: Triboelectric Effect

Data Source

PatentUS10938324B2Energy harvester for electrostatic energy

Publication Date: 2021.03.02 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided is an electrostatic energy harvester Including a lower electrode; a ferroelectric material layer which is disposed on the lower electrode and formed of a poled ferroelectric material; a friction-charged body which is adapted to be repeatedly contacted with and separated from the ferroelectric material layer and has an electric susceptibility different from an electric susceptibility of the ferroelectric material layer; and an upper electrode provided on the friction-charged body.