Hydrogel-Coated Battery Substrate for Better Electrolyte Impregnation
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Solution Overview
Problem
Existing rechargeable lithium batteries face challenges in achieving high energy density and capacity due to limitations in electrolyte impregnation and ion mobility.
Innovation Solution
A composite substrate for lithium batteries is developed, comprising a support layer and a coating layer containing a carbon material and a hydrogel, which enhances electrolyte impregnation and ion mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional substrate is used in rechargeable lithium batteries, then the battery structure is simple and easy to manufacture, but the electrolyte impregnation is insufficient and ion mobility is limited
Solution Approach 1:
The patent applies composite materials by combining a support layer with a coating layer containing carbon materials (such as graphite, carbon nanotubes, or graphene) and conductive polymers (such as polyani line, polypyrrole, or polythiophene). This composite structure enhances electrolyte impregnation and ion mobility while maintaining structural integrity, resolving the contradiction between improved reliability and device complexity.
Solution Approach 2:
The patent utilizes porous materials by incorporating porous carbon materials and creating a porous coating layer structure that facilitates electrolyte penetration and ion transport. The porous structure increases the surface area and pathways for electrolyte impregnation, thereby improving ion mobility without significantly complicating the manufacturing process.
2Quantity of substance
If the battery capacity is increased to achieve high energy density, then the energy storage capability is improved, but the ion mobility and electrolyte impregnation become limiting factors
Solution Approach 1:
The patent applies local quality by creating a coating layer with specific local properties on the substrate surface. The coating layer contains high concentrations of conductive materials and porous structures specifically at the electrolyte interface, where they are most needed for enhancing ion mobility and electrolyte impregnation, while the bulk substrate maintains its structural function.
Solution Approach 2:
The porous coating layer provides numerous pathways and increased surface area for electrolyte penetration and ion transport, directly addressing the ion mobility limitation that constrains battery capacity and energy density.
3Reliability
If a coating layer with carbon material and hydrogel is added to improve electrolyte impregnation, then ion mobility is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies parameter changes by optimizing the composition ratios, thickness, and physical-chemical properties of the coating layer materials. By carefully controlling parameters such as carbon material particle size, conductive polymer concentration, and coating layer thickness, the patent achieves improved ion mobility while keeping the manufacturing process within reasonable complexity limits.
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 composite substrate improves electrolyte impregnation and ion mobility, resulting in superior cell performance and increased battery lifetime stability.
Implementation Method 1
The coating layer may be configured to contain an electrolyte
Implementation Method 2
superior ion mobility
Data Source
AI summary
Disclosed are composite substrates and rechargeable lithium batteries including the composite substrates. A composite substrate includes a support layer and a coating layer on the support layer. The coating layer includes a carbon material and a hydrogel. The coating layer is configured to contain an electrolyte.