Solid Electrolyte Membrane for Alkali Metal Extraction
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Solution Overview
Problem
Current critical mineral extraction systems face challenges such as high energy requirements, low yield of high-purity materials, and inefficiencies in membrane systems, which lead to high costs and environmental impacts.
Innovation Solution
A membrane-based alkali metal extraction system is proposed, which includes an anode and a cathode configured for oxidation and reduction, respectively, with an ion-selective solid electrolyte membrane that selectively permeable to predetermined alkali metal ions, allowing for efficient extraction and purification of critical minerals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional membrane systems are used for critical mineral extraction, then separation of alkali metals can be achieved, but ionic conductivity is low and membrane durability is reduced
Solution Approach 1:
The patent employs composite membrane structures combining multiple materials with complementary properties. The membrane includes a support layer providing mechanical strength and a functional layer with ion-conductive pathways, creating a composite that simultaneously achieves high durability and ionic conductivity. This resolves the contradiction by integrating materials that individually address each requirement.
Solution Approach 2:
The patent utilizes porous membrane structures with controlled pore sizes and distributions to facilitate ion transport while maintaining mechanical integrity. The porous architecture provides pathways for high ionic conductivity while the structural framework ensures membrane durability, resolving the contradiction between these two properties.
2Productivity
If conventional electrode coatings are used, then lithium extraction can be performed, but manufacturing costs are high and the coatings are fragile
Solution Approach 1:
The patent replaces expensive, fragile electrode coatings with durable, cost-effective alternative materials that can be easily manufactured and disposed of or recycled. The new electrode structure uses stable materials that are less sensitive to manufacturing precision requirements, reducing capital costs while maintaining extraction efficiency.
Solution Approach 2:
The patent substitutes complex mechanical coating processes with simpler deposition or formation methods. Instead of requiring precise, expensive coating equipment and procedures, the electrode structure is formed through more straightforward processes that reduce manufacturing complexity and cost while achieving the same lithium extraction function.
3Productivity
If conventional extraction systems are used, then alkali metals can be separated from feed solution, but energy consumption is high and water usage is excessive
Solution Approach 1:
The patent utilizes phase transition processes, such as freezing or condensation, to separate alkali metals from feed solutions. These phase changes enable efficient separation at lower energy costs compared to conventional thermal processing methods. The phase transition allows for selective precipitation or crystallization of alkali metals, reducing overall energy and water requirements.
Solution Approach 2:
The patent changes operational parameters such as temperature, pressure, or concentration thresholds to optimize the extraction process. By adjusting these parameters, the system achieves efficient alkali metal separation while minimizing energy and water consumption. The parameter modifications enable the system to operate more efficiently than conventional approaches.
4Productivity
If conventional extraction systems are used, then critical minerals can be recovered, but toxic waste streams are generated and greenhouse gas emissions increase
Solution Approach 1:
The patent converts harmful byproducts and waste streams into useful resources. For example, waste streams containing valuable elements are processed to recover these materials, transforming what would be harmful waste into valuable products. This approach reduces toxic waste discharge and associated environmental harm while maintaining critical mineral recovery efficiency.
Solution Approach 2:
The patent implements recovery processes for materials that would otherwise be discarded or cause environmental harm. The system recovers valuable elements from waste streams and reuse them in the extraction process or for other purposes, reducing the need to discard toxic materials and minimizing greenhouse gas emissions from fossil fuel-based energy production.
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 system achieves efficient extraction and purification of alkali metals, reducing energy consumption and environmental impact, while also enabling the recovery of input energy as electrochemical energy, thus enhancing sustainability and cost-effectiveness.
Implementation Method 1
the ion-selective solid electrolyte membrane is selectively permeable to the predetermined alkali metal ion
Implementation Method 2
migration of a predetermined alkali metal ion through an ion-selective solid electrolyte membrane is driven by a current across the anode and the cathode
Implementation Method 3
an anode and a cathode, where the anode is configured for oxidation and the cathode is configured for reduction
Implementation Method 4
migration of a predetermined alkali metal ion through an ion-selective solid electrolyte membrane is driven by a current across the anode and the cathode
Data Source
AI summary
The presently disclosed concepts relate to improved techniques for critical mineral extraction, purification, precipitation, ion exchange, and metal production using a solid electrolyte membrane. By using a solid electrolyte embedded in a matrix, alkali metal (such as lithium) can be more effectively separated from feed solutions. Additionally, energy used to initially extract critical minerals from a feed solution may be stored as electrochemical energy, which in turn, may be discharged when critical minerals are depleted from the electrode. This discharged energy may therefore be reclaimed and reused to extract additional critical minerals.