Liquid Metal Alloy Battery Design for Scalable Energy Storage
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Solution Overview
Problem
Current energy storage technologies, such as lead-acid batteries and sodium-sulfur batteries, face limitations in capacity, scalability, flexibility, and lifespan, particularly in managing the mismatch between energy supply and demand, and are not well-suited for frequent activation or renewable energy integration.
Innovation Solution
An electrochemical battery design featuring a vertical stack of liquid positive and negative electrodes and an electrolyte, with a circulation producer to enhance material flow between electrodes, utilizing alkaline earth metals and a molten salt electrolyte for high current density and long-term energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional lead-acid batteries are used for large-scale electrochemical energy storage, then high capacity storage is achieved, but the devices are not compact and cannot be flexibly located
Solution Approach 1:
The patent changes the physical state parameter of the electrodes from solid to liquid, enabling the battery to be poured into molds of various shapes and sizes. This allows the same energy storage capacity to be achieved in compact, flexible configurations suitable for different locations, resolving the contradiction between high capacity and adaptability.
2Adaptability or versatility
If conventional lead-acid batteries operate over wide voltage range with frequent activation, then energy management flexibility is improved, but the cycle life is reduced to several hundred cycles
Solution Approach 1:
The patent changes the electrode material properties from solid lead-acid to liquid metal alloys with different compositions. The liquid state and adjustable composition allow the battery to respond rapidly to charging and discharging while maintaining structural integrity and long cycle life, resolving the contradiction between adaptability and duration.
3Reliability
If sodium-sulfur batteries use thin solid ceramic electrolyte to maximize sodium ion conduction, then ionic conductivity is improved, but the electrolyte becomes mechanically fragile and cell size is limited
Solution Approach 1:
The patent changes the electrolyte from solid ceramic to liquid molten salt, eliminating the mechanical fragility issue while maintaining high ionic conductivity. The liquid state provides both excellent ion transport properties and mechanical flexibility, allowing larger cell sizes without compromising electrolyte integrity.
Solution Approach 2:
The patent uses composite liquid metal alloy electrodes combined with liquid molten salt electrolyte, creating a fully liquid system that achieves both high ionic conductivity and mechanical robustness, resolving the contradiction between conduction efficiency and structural strength.
4Quantity of substance
If sodium-sulfur batteries are constructed with many small cells to achieve large capacity, then scalability is improved, but system complexity and cost increase
Solution Approach 1:
The patent changes the electrode and electrolyte to liquid states, enabling single large-cell construction that achieves high capacity without the complexity of assembling many small cells. The liquid materials can be contained in single large vessels, dramatically reducing system complexity while maintaining scalability through straightforward capacity adjustment.
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 battery achieves high current densities, long lifespan, and scalability, enabling efficient energy storage and management, suitable for both conventional and renewable energy sources, and can be compactly located for flexible deployment.
Implementation Method 1
a circulation producer configured to generate circulation within one of the layers, thereby inducing a flow of liquid material of the one of the layers to and from one of the electrode/electrolyte interfaces
Implementation Method 2
electrochemical battery comprises a container, a positive electrode, a negative electrode and an electrolyte
Implementation Method 3
The electrodes and the electrolyte exist as liquid material layers within the walls of the container at the operating temperature of the battery
Data Source
AI summary
An energy storage device configured to exchange energy with an external device includes a container having walls, a lid covering the container and having a safety pressure valve, a negative electrode disposed away from the walls of the container, a positive electrode in contact with at least a portion of the walls of the container, and an electrolyte contacting the negative electrode and the positive electrode at respective electrode/electrolyte interfaces. The negative electrode, the positive electrode and the electrolyte include separate liquid materials within the container at an operating temperature of the battery.