Nanocarbon Dispersion Composition for High-Solid Battery Electrodes
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Solution Overview
Problem
The challenge in manufacturing electrodes for rechargeable lithium batteries lies in achieving high solid content with low viscosity in conductive material dispersed liquids, which affects processability and increases processing costs.
Innovation Solution
Incorporating a fluorine-containing lithium salt, such as LiFSI or LiTFSI, into the conductive material dispersed liquid with nanocarbon to form a colloidal network, reducing viscosity while maintaining a high solid content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the solid content of conductive material dispersed liquid is increased to improve electrode performance, then the viscosity increases making processing difficult
Solution Approach 1:
The patent changes the chemical composition parameters of the dispersed liquid by introducing fluorine-containing lithium salts (LiFSI, LiTFSI) at specific concentrations (0.01-5 wt%). This chemical parameter modification fundamentally alters the liquid's physical properties, enabling high solid content (10-50 wt% nanocarbon) to be achieved while maintaining low viscosity through colloidal network formation.
2Ease of manufacture
If the solid content is increased to reduce processing costs, then the viscosity increases affecting manufacturing efficiency
Solution Approach 1:
The patent creates a composite system combining nanocarbon particles with fluorine-containing lithium salts in a solvent matrix. This composite structure forms a colloidal network where the lithium salts act as structural organizers, enabling the system to simultaneously achieve high solid content (reducing material costs) and low viscosity (maintaining manufacturing efficiency).
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 improves processability, reduces processing costs, and enhances electrode manufacturing efficiency by achieving a suitable viscosity range for electrode production.
Implementation Method 1
Incorporating a fluorine-containing lithium salt, such as LiFSI or LiTFSI, into the conductive material dispersed liquid with nanocarbon to form a colloidal network, reducing viscosity while maintaining a high solid content
Data Source
AI summary
Disclosed are conductive material dispersion liquid including nanocarbon, a fluorine-containing lithium salt, a solvent, an electrode composition, an electrode for a rechargeable lithium battery, and a rechargeable lithium battery.