PVB-Bound Electrode Material for Higher-Capacity Printed Polymer Batteries
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Solution Overview
Problem
Existing organic batteries with conventional binders have limited charging and discharging capacities, necessitating the development of a more effective electrode material for enhanced performance.
Innovation Solution
The electrode material incorporates polyvinyl butyral (PVB) as a binder, combined with organic redox-active polymers and conductivity additives, enabling improved charging and discharging capacities, and is suitable for printing processes such as gravure printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional cellulose-based binders are used in organic battery electrodes, then the electrodes can be manufactured with standard materials and processes, but the charging and discharging capacities are limited
Solution Approach 1:
The patent changes the chemical composition parameter of the binder from conventional cellulose-based materials to polyvinyl butyral (PVB), which has different adhesive properties and chemical stability. This parameter change directly resolves the contradiction by enabling higher charging/discharging capacities while maintaining manufacturing feasibility through established coating processes.
Solution Approach 2:
The patent creates a composite electrode material system combining PVB binder with organic redox-active polymers and conductivity additives. This composite approach allows the binder to provide enhanced adhesive properties and electrochemical stability, resulting in improved capacity while maintaining structural integrity during charge-discharge cycles.
2Quantity of substance
If polyvinyl butyral (PVB) is used as a binder to improve charging and discharging capacities, then battery performance is significantly enhanced, but the material selection becomes more specific and less conventional
Solution Approach 1:
The patent specifies PVB with particular molecular weight ranges and hydroxyl value parameters to optimize both capacity and manufacturability. By defining precise parameter ranges, the invention balances performance enhancement with ease of manufacture, as these parameters can be controlled during PVB synthesis or selected from commercially available grades.
3Quantity of substance
If the electrode material is optimized for high capacity, then battery performance improves, but the suitability for printing processes may be compromised
Solution Approach 1:
The PVB binder serves multiple functions simultaneously: it provides strong adhesion for high capacity, maintains slurry rheology for printing processes, and ensures electrode structural stability. This multi-functionality resolves the contradiction by making the same material system suitable for both high-performance requirements and printing manufacturability.
Solution Approach 2:
The patent optimizes the slurry composition parameters including PVB concentration, solvent ratio, and particle size distribution to achieve both high capacity and printability. The binder concentration and molecular weight are specifically tuned to provide appropriate viscosity and flow characteristics for gravure printing while maintaining high electrochemical performance.
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 use of PVB-based electrode material significantly enhances the charging and discharging capacities of organic batteries compared to conventional cellulose-based binders, making it suitable for high-performance organic batteries and printable battery technology.
Implementation Method 1
Organic batteries are electrochemical cells that use an organic charge storage material as the active electrode material for storing electrical charge
Implementation Method 2
the electrode material is typically mixed with a conductivity additive, for example, a carbon material
Data Source
AI summary
The present invention relates to an electrode material comprising at least one organic redox-active polymer, at least one conductivity additive, and polyvinyl butyral as a binder. Organic batteries with improved charge and discharge capacities can be produced using the electrode material according to the invention. The invention also relates to the electrodes comprising the electrode material and the batteries comprising the electrodes. The electrode material can also be used for printing electrodes.