Binder-Coated Battery Agglomerations for Low-Solvent Electrodes
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Solution Overview
Problem
Conventional electrode manufacturing processes for electrochemical storage devices, such as batteries, require substantial solvent use and drying times, leading to high costs and environmental pollution, particularly with water-based solvents, and face challenges with solvent recovery systems.
Innovation Solution
A method involving elevated temperature and pressure conditions to dissolve binder material particles in solvents, followed by agitation with active battery material particles, and subsequent controlled solvent evaporation to produce binder-coated active battery material agglomerations, reducing solvent requirements and enabling dry electrode manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional solvent-based electrode manufacturing is used, then binder distribution and coating of active battery material particles is achieved, but substantial solvent use and drying times lead to high costs and environmental pollution
Solution Approach 1:
The patent changes the physical state parameter of the binder from dissolved (in solvent-based slurry) to particulate (dry powder), eliminating the need for solvent while maintaining binder distribution and coating capabilities through direct mixing and compression processes
Solution Approach 2:
The invention transitions from a liquid-phase slurry process to a solid-phase dry processing approach, where binder particles are mixed with active material particles and then compressed to form the electrode structure, eliminating solvent evaporation and drying steps
2Ease of manufacture
If conventional solvent-based electrode manufacturing is used, then binder distribution and coating of active battery material particles is achieved, but substantial drying times are required
Solution Approach 1:
The patent changes the process from liquid-phase drying to solid-phase compression, where binder particles are directly compressed with active material particles to form adhered electrode structures, eliminating the time-consuming drying step entirely
Solution Approach 2:
The invention extracts and eliminates the solvent component from the manufacturing process, removing the associated drying step and reducing overall manufacturing time while maintaining effective binder distribution and coating
3Ease of manufacture
If water-based solvents are used, then binder distribution is achieved, but environmental pollution and high costs occur
Solution Approach 1:
The patent changes the binder form from dissolved state in water-based solvent to dry particulate form, enabling binder distribution through mechanical mixing and compression without using any solvents, thereby eliminating environmental pollution associated with solvent disposal
4Productivity
If conventional solvent-based processes are used, then electrode manufacturing is achieved, but solvent recovery systems are required
Solution Approach 1:
The invention extracts and removes the solvent component from the manufacturing process entirely, replacing it with a dry powder mixing and compression approach, which eliminates the need for complex solvent recovery systems while maintaining electrode manufacturing productivity
Solution Approach 2:
The patent transitions from a liquid-phase process requiring solvent management to a solid-phase process using dry powders, fundamentally changing the process parameters to eliminate solvent recovery requirements
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 minimizes solvent use, eliminates the need for solvent recovery systems, and enhances manufacturing efficiency and environmental friendliness, resulting in cost-effective and high-performance electrodes.
Implementation Method 1
dissolving a mixture of binder material particles in a solvent under the application of a first set of environmental parameters including at least one of applied heat or pressure above ambient conditions to generate a binder-solvent solution
Implementation Method 2
subjecting the intermediate solution to a second set of environmental parameters, distinct from the first set, to generate a powder mixture. The resulting powder mixture comprises binder-coated active battery material agglomerations
Data Source
AI summary
A method for producing binder-coated active battery material agglomerations includes agitating, within a vessel, a volume of a binder-solvent solution across two or more steps with a particulate mixture including active battery material particles. The binder-solvent solution has a solubility limit for a mixture of binder material particles within a first solvent solution at a first set of environmental parameters. While retaining the particulate mixture within the vessel, the particulate mixture is subjected to a second set of environmental parameters across two or more steps which reduces the solubility limit to generate a powder mixture of binder-coated active battery material agglomerations.