Single-Layer Pulp Paper for Flexible Zinc-Manganese Batteries
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Solution Overview
Problem
Current flexible film zinc-manganese batteries face issues such as high internal resistance, low active material utilization, poor discharge performance, and short storage periods due to the use of multi-layer separating papers and non-ionic polymers, which increase internal resistance and fail to meet water absorption requirements.
Innovation Solution
A single-layer pulp paper is developed using sodium polyglutamate, potassium polyaspartate, and modified starch, combined with potassium hyaluronate and inorganic corrosion inhibitors, to enhance ion conductivity and water absorption, reducing internal resistance and improving discharge capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-layer separating papers are used, then isolation performance is improved, but internal resistance increases
Solution Approach 1:
The patent combines multiple functions (isolation, corrosion inhibition, water absorption, adhesion) into a single-layer pulp paper by integrating different components: insulating base paper for isolation, corrosion inhibitor for protection, superabsorbent polymer for water management, and binder for structural integrity. This merging eliminates the need for multi-layer construction while maintaining isolation performance and reducing internal resistance.
Solution Approach 2:
The single-layer pulp paper serves multiple functions simultaneously: it acts as an isolator between electrodes, provides corrosion inhibition through embedded inhibitors, absorbs and retains electrolyte via superabsorbent polymer, and maintains structural integrity through binder. This multi-functionality replaces the specialized multi-layer structure with a unified component.
2Strength
If non-ionic polymers are used as additives, then adhesion and film formation are improved, but internal resistance greatly increases
Solution Approach 1:
The patent changes the type of polymer additive from conventional non-ionic polymers (polyvinyl alcohol, polyacrylamide, polyvinyl pyrrolidone, polyethylene glycol, polyether) to a specifically formulated binder system that provides adequate adhesion and film formation without the severe internal resistance increase. This parameter change in material selection resolves the contradiction between adhesion strength and internal resistance.
3Quantity of substance
If ionic polyelectrolytes are used, then water absorption capacity is improved, but adhesion and film formation fail to meet requirements
Solution Approach 1:
The patent creates a composite pulp paper structure combining insulating base paper with embedded functional components (corrosion inhibitor, superabsorbent polymer, binder). This composite approach achieves both adequate adhesion through the binder system and high water absorption capacity through the superabsorbent polymer, resolving the contradiction between these two properties.
4Object-affected harmful factors
If single-layer pulp paper is used, then internal resistance is reduced, but isolation performance may be compromised
Solution Approach 1:
The patent merges the isolation function with other functions in a single-layer structure. The insulating base paper provides the isolation barrier, while embedded corrosion inhibitors, superabsorbent polymer, and binder provide additional functions. This integration maintains isolation performance while eliminating the internal resistance penalty of multi-layer construction.
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 solution results in a pulp paper with low internal resistance, high water absorption, and excellent ionic conductivity, enabling better high current and pulse discharge performance, thereby enhancing the battery's capacity and application potential.
Implementation Method 1
maintaining the electrolyte to ensure the normal internal ion movement
Implementation Method 2
the organic corrosion inhibitor which can be attached to the zinc powder on the surface of the anode to form a corrosion inhibitor film
Implementation Method 3
displacement occurred between the inorganic corrosion inhibitor and the zinc powder of the anode to form a layer of corrosion inhibitor film on the surface of the zinc power
Implementation Method 4
the organic corrosion inhibitor which can be attached to the zinc powder on the surface of the anode to form a corrosion inhibitor film
Data Source
AI summary
The invention relates to a pulp paper for flexible film zinc ‐manganese battery, which comprises a base paper with only one layer and slurry coated on both sides which comprises modified starch, polyelectrolyte, water retaining agent, organic/inorganic composite corrosion inhibitor, and electrolytes wherein the polyelectrolyte is one or more of polyglutamic acid, sodium polyglutamate, potassium polyglutamate, polyaspartic acid, sodium polyaspartate and sodium polyaspartate, and the water retaining agent is a sodium salt or a potassium salt of hyaluronic acid. The pulp paper in the invention has the advantages of thin layer, simple composition, fast absorption speed, large liquid absorption capacity, good liquid‐retaining ability, good ionic conductivity and low wet resistance which boosts good application value in the field of flexible battery technology. The flexible film zinc‐manganese battery applying the pulp paper has advantages of low resistance, large battery capacity, good high current and excellent pulse discharge capacity, has a good application value in the field of flexible battery technology.