Polymer Embedded Electrodes Replace Metal Substrates
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Solution Overview
Problem
Primary batteries result in significant material wastage and environmental issues due to their one-time use, and the energy required for their manufacture exceeds the energy stored, making rechargeable secondary cells a more desirable option.
Innovation Solution
The development of polymer embedded electrodes for use in both primary and secondary batteries, where the electrodes comprise an electroactive material disposed on a polymer substrate, such as polypropylene mesh, which serves as a cost-effective alternative to metal substrates like nickel and copper, allowing for reduced material costs while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal substrates like nickel and copper are used in electrodes, then electrical conductivity and structural stability are improved, but material costs and environmental impact increase
Solution Approach 1:
The patent replaces expensive metal substrates (nickel and copper) with inexpensive polymer substrates for electrode fabrication. The polymer substrate serves as a cost-effective alternative that reduces material costs while maintaining functional performance in both primary and secondary batteries
Solution Approach 2:
The patent creates composite electrode structures by depositing electroactive materials onto polymer substrates. This composite approach combines the advantages of polymer materials (low cost, flexibility) with the functional properties of electroactive materials, achieving a balance between performance and cost-effectiveness
2Reliability
If primary batteries are manufactured with metal substrates, then performance requirements are met, but material wastage and environmental consequences increase due to one-time use
Solution Approach 1:
The patent enables cost-effective disposable battery production by using polymer substrates instead of expensive metals. This makes single-use batteries more environmentally sustainable by reducing the environmental footprint associated with metal extraction and processing, while still meeting performance requirements
Solution Approach 2:
The patent changes the fundamental material parameter of the substrate from metal to polymer, which alters the environmental impact profile while maintaining electrical and structural functionality. This parameter change enables batteries to meet performance requirements with reduced environmental harm
3Loss of substance
If polymer substrates are used in electrodes, then material costs are reduced, but electrical conductivity and structural stability may be compromised
Solution Approach 1:
The patent creates composite electrodes by combining polymer substrates with electroactive materials. The polymer provides structural support and cost benefits, while the electroactive material layer provides the necessary electrical conductivity and electrochemical functionality, achieving a synergistic combination that overcomes the limitations of pure polymer materials
Solution Approach 2:
The patent applies different materials to different parts of the electrode structure: polymer substrates provide mechanical support and cost-effectiveness in regions where structural integrity is needed, while electroactive materials provide electrical conductivity in regions where electrochemical reactions occur. This local differentiation optimizes both cost and performance
Data Source
AI summary
An electrode includes an electrode material, a polymer substrate, and a current collector. The electrode material comprises an electroactive material, and the electrode material forms an electrode material sheet. The electrode material sheet is disposed on the polymer substrate, and a current collector in electrical contact with the electrode material.