Recycled Polyolefin Resin Composition for Battery Separator Reuse
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Solution Overview
Problem
The recycling of secondary battery separators is hindered by the inorganic particle coating layer, which complicates the detachment process and affects the physical properties of the recycled polyolefin resin, leading to difficulties in reusing these materials for new battery production and other products.
Innovation Solution
A mixed recycled polyolefin resin composition is developed, comprising a new polyolefin resin and a recycled polyolefin resin recovered from waste separators, with the inorganic particle coating layer detached to improve processability and physical properties, allowing for the creation of products with enhanced mechanical and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic particle coating layer is retained on the waste separator, then the separator maintains its original protective function, but the detachment process becomes complicated and the physical properties of recycled resin deteriorate
Solution Approach 1:
The patent applies preliminary action by performing detachment of the inorganic particle coating layer before recycling the polyolefin resin. This preliminary removal step simplifies subsequent processing and improves the quality of recycled resin, allowing it to meet specifications for new battery separators without compromising the original protective function during operation.
Solution Approach 2:
The patent segments the separator into two distinct components: the inorganic particle coating layer and the polyolefin resin base. This segmentation allows the inorganic layer to be removed and recycled separately, while the polyolefin resin can be processed independently for high-quality recycling applications, resolving the conflict between maintaining protective function and simplifying detachment.
2Strength
If the inorganic particle coating layer is detached from the waste separator, then the physical properties of recycled polyolefin resin improve, but the detachment process becomes more complex
Solution Approach 1:
The patent replaces complex mechanical detachment methods with a chemical or thermal treatment approach that selectively removes the inorganic particle coating layer. This substitution simplifies the overall process while effectively improving the physical properties of the recycled polyolefin resin by eliminating contaminants.
Solution Approach 2:
The patent introduces an intermediary treatment step (such as chemical etching or thermal oxidation) that facilitates the selective removal of the inorganic coating layer. This intermediary process acts as a mediator between the coating layer and the base resin, enabling clean separation that improves recycled resin quality without requiring overly complex equipment.
3Productivity
If recycled polyolefin resin from waste separators is used for new battery production, then material recycling rate increases, but the resin must meet strict quality specifications
Solution Approach 1:
The patent extracts and removes the inorganic particle coating layer from the waste separator before recycling the polyolefin resin. This extraction process eliminates contaminants that would prevent the recycled resin from meeting the strict quality specifications required for new battery production, thereby enabling high recycling rates while maintaining manufacturing precision.
Solution Approach 2:
The patent applies parameter changes through thermal or chemical treatment to modify the properties of the recycled polyolefin resin. By controlling temperature, time, or chemical concentration parameters during the detachment and processing stages, the resin properties are adjusted to meet the stringent quality requirements for new battery separators while maximizing material recycling.
Data Source
AI summary
The disclosed technology relates to a mixed recycled polyolefin resin composition comprising a recycled polyolefin resin obtained from a waste separator and a new polyolefin resin, and a recycled product using the same. The mixed recycled polyolefin resin composition comprising a new polyolefin resin and a recycled polyolefin resin from a waste separator based on an embodiment of the disclosed technology has excellent physical and chemical properties.