Cellulose-Cork Hydrogel Electrolyte for Humidity-Stable Ion Transport
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Solution Overview
Problem
Existing hydrogel electrolytes lack sufficient ionic conductivity and are not optimized for environments with varying humidity levels, limiting their performance in energy storage devices.
Innovation Solution
A hydrogel composition comprising cellulose or its derivatives and cork particles, with a specific particle size and ratio, optionally including alkali metal ions and urea, enhances ionic conductivity and adapts to varying humidity levels, integrated with scalable and sustainable materials for energy storage devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydrogel electrolytes are used, then the device structure is simple, but the ionic conductivity is insufficient (below 2 mS cm^-1)
Solution Approach 1:
The patent applies composite materials by combining cellulose (natural polymer) with cork particles (biomass filler) to create a hydrogel electrolyte with enhanced ionic conductivity. The cork particles serve as multifunctional additives that improve both ionic transport and thermal management properties, achieving ionic conductivity of at least 2 mS cm^-1 while maintaining environmental sustainability.
Solution Approach 2:
The patent utilizes porous materials by incorporating cork particles with controlled porosity into the hydrogel matrix. The porous structure of cork particles creates additional ion transport pathways and increases the effective surface area for ionic conduction, thereby enhancing ionic conductivity without significantly increasing the overall device complexity.
2Adaptability or versatility
If standard hydrogel electrolytes are used, then the manufacturing process is simple, but the performance in varying humidity environments is limited
Solution Approach 1:
The patent applies parameter changes by optimizing the cellulose-to-cork particle ratio and controlling the particle size distribution (50-500 μm) to enhance humidity adaptability. The specific composition parameters enable the hydrogel to maintain stable ionic conductivity across varying humidity levels, while the preparation method remains relatively straightforward using conventional hydrogel synthesis techniques.
3Reliability
If cork particles with optimal size (500-800 μm) and ratio (1:1 to 5:1) are used, then ionic conductivity increases to 2-4 mS cm^-1, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by specifying optimal ranges for cork particle size (500-800 μm) and cellulose-to-cork ratio (1:1 to 5:1) to achieve localized enhancement of ionic conductivity. These controlled parameters create optimal regions within the hydrogel structure that facilitate ion transport, achieving 2-4 mS cm^-1 conductivity while maintaining manufacturability through defined parameter ranges rather than exact specifications.
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 hydrogel composition achieves ionic conductivities of 2-4 mS cm^-1 and demonstrates improved performance in environments with higher relative humidity, enabling efficient energy storage and thermal energy conversion in devices like supercapacitors.
Implementation Method 1
a hydrogel composition comprising cellulose or a derivative
Implementation Method 2
the hydrogel composition has an ionic conductivity of at least 2 mS cm -1
Data Source
Figure 1a~2e
Figure 3A~3B
Figure 4~5
AI summary
The present disclosure is directed to a hydrogel composition comprising cellulose or a derivative thereof, preferably microcrystalline cellulose, and cork particles, preferably having a particle size from 500 to 800 µm, wherein a ratio between said cellulose and the cork particles is from 1:1 to 5:1, respectively. said hydrogel composition has an ionic conductivity of at least 2 mS.cm-1, preferably from 2 mS.cm-1 to 5 mS.cm-1, more preferably from 2 mS.cm-1 to 4 mS.cm-1. The hydrrogel solution could be deposited by 3D-printing. Further devices and articles comprising the composition are disclosed. Methods of obtaining a hydrogel composition, and device are further disclosed.