Triboelectric Energy Harvester Using Electrolyte Solution
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Solution Overview
Problem
Triboelectric energy harvesters face limitations in generating triboelectric energy due to the constraints of friction materials selected based on the triboelectric series, which restricts the magnitude of electric charge and energy production.
Innovation Solution
A triboelectric energy harvester using an electrolyte solution with specific electrolytes and polymer materials, where the friction material layer acts as an electrode, allowing for the generation of greater triboelectric energy by varying the type and concentration of the electrolyte, thereby adjusting the charging characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional friction materials from the triboelectric series are used, then the device structure remains simple, but the magnitude of triboelectric energy generated is limited
Solution Approach 1:
The patent changes the chemical parameters of the friction material by using electrolyte solutions with varying concentrations and types (e.g., NaCl, KCl, CaCl2 at different molarities). This allows continuous adjustment of triboelectric charge magnitude without changing the basic device structure, resolving the contradiction between energy magnitude and structural simplicity
Solution Approach 2:
The patent employs composite material systems combining solid friction materials (e.g., nylon, polyethylene) with liquid electrolyte solutions. This composite approach enables enhanced triboelectric energy generation compared to traditional solid-solid friction, while maintaining relatively simple device architecture through the liquid-solid interaction mechanism
2Power
If the friction material is changed to increase electric charge, then triboelectric energy magnitude improves, but the difficulty of controlling and specifying characteristics increases
Solution Approach 1:
The patent provides precise control over triboelectric characteristics by adjusting electrolyte parameters (type, concentration, molarity). This systematic parameter control method makes it easier to specify and reproduce desired electric charge characteristics compared to trial-and-error material selection, resolving the contradiction between energy magnitude and controllability
Solution Approach 2:
The patent establishes a controllable system where electrolyte composition can be adjusted based on desired output characteristics. The measurable relationship between electrolyte concentration and triboelectric charge magnitude enables feedback-based optimization, improving ease of controlling device characteristics
3Power
If new materials beyond the triboelectric series are used, then triboelectric energy generation improves, but the complexity of material selection and optimization increases
Solution Approach 1:
The patent simplifies material selection complexity by using a systematic approach with common electrolytes (NaCl, KCl, CaCl2, etc.) at varying concentrations. This parameter-based optimization is more straightforward than exploring novel materials, resolving the contradiction between enhanced energy generation and material selection complexity
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
This approach enables the generation of significantly greater triboelectric energy compared to traditional materials, with adjustable energy output by controlling the electrolyte composition, enhancing energy harvesting capabilities.
Implementation Method 1
The energy conversion using the triboelectric effect has a superior conversion efficiency while ensuring a compact and lightweight structure
Implementation Method 2
A triboelectric energy harvester using an electrolyte solution with specific electrolytes and polymer materials, where the friction material layer acts as an electrode, allowing for the generation of greater triboelectric energy by varying the type and concentration of the electrolyte
Data Source
AI summary
Disclosed is a triboelectric energy harvester including an electrolyte solution comprising an electrolyte, and a friction material layer configured to contact the electrolyte solution, wherein the friction material layer is configured to be used as an electrode, and wherein frictional electricity is generated in response to the electrolytic solution contacting the friction material layer.