Separator-Integrated Electrode Layer for Stable High-Energy Alkaline Cells
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Solution Overview
Problem
Commercial alkaline batteries face limitations in energy density due to materials used, and the use of lithium metal or metal alloys results in insufficient cycle stability and high production costs, while existing separator coatings complicate and cost-increase electrode production.
Innovation Solution
A method involving applying a separator membrane to a planar electrode, penetrating a liquid containing polymer and inorganic particles into the pores, and evaporating the solvent to create an enriched material layer that forms a stable protective layer, enhancing electrolyte distribution and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If lithium metal or metal alloys are used instead of graphite-based anode to improve energy density, then energy density increases, but cycle stability becomes insufficient and production costs increase
Solution Approach 1:
The patent introduces a separator membrane as an intermediary component between the lithium metal anode and electrolyte. This separator membrane mediates the interaction by providing a controlled interface that enables lithium ion transport while preventing direct contact between lithium metal and electrolyte, thereby improving cycle stability without sacrificing energy density
Solution Approach 2:
The patent employs a separator membrane with specific porous structure that allows selective ion transport. The porous material provides pathways for lithium ion diffusion while maintaining mechanical stability and preventing dendrite formation, thus resolving the contradiction between high energy density and cycle stability
2Strength
If inorganic particles are used in separator coating to improve mechanical stability and operating currents, then mechanical stability improves, but production complexity and costs increase
Solution Approach 1:
The patent applies inorganic particles locally within the separator membrane structure rather than as a comprehensive coating. This localized application provides mechanical reinforcement and improved operating current characteristics only where needed, reducing overall production complexity while maintaining essential performance improvements
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 method produces an electrode with high energy density, chemical, electrochemical, and mechanical stability, enabling high cycle stability and operating currents, and reduces production costs.
Implementation Method 1
the liquid comprising material penetrates, by way of capillary forces, at least into the pores of the separator membrane, into the intermediate space between the planar electrode and the separator membrane
Implementation Method 2
the liquid is subsequently evaporated
Data Source
AI summary
Disclosed are a method for producing an electrode for a galvanic cell, an electrode for a galvanic cell, a galvanic cell, and uses of the galvanic cell. The method comprises: applying a separator membrane to a planar electrode such that an intermediate space is formed between the planar electrode and the separator membrane; subsequently applying a liquid comprising a particular material to the separator membrane, wherein the liquid comprising material penetrates, by way of capillary forces, at least into the pores of the separator membrane, into the intermediate space between the planar electrode and the separator membrane and into pores of the planar electrode, wherein the liquid is subsequently evaporated. The method makes it easily and inexpensively possible to provide an electrode which exhibits a high energy density at the cell level and high chemical, electrochemical and mechanical stability, exhibits high cycle stability and allows high operating currents.