Diatom Frustule Electrodes for Energy Storage
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Solution Overview
Problem
Current energy storage devices, such as batteries and capacitors, face challenges in maintaining uniform layer thickness and structural integrity, especially under compressive pressure or shape deformation, which can lead to reliability issues and increased costs due to inadequate mechanical strength.
Innovation Solution
Incorporating diatom frustules with specific shapes, dimensions, and surface modifications, such as conductive materials or nanostructures, into the layers of energy storage devices to enhance mechanical strength and conductivity, allowing for the use of printing technologies that maintain uniform thickness and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional materials are used in energy storage device layers, then manufacturing cost is reduced, but mechanical strength and structural integrity under compressive pressure deteriorate
Solution Approach 1:
The patent employs composite materials by combining diatom frustules (natural silica-based structures) with conventional battery materials. The frustules provide exceptional mechanical strength and structural integrity while maintaining cost-effectiveness due to their natural abundance and ease of processing. This composite approach resolves the contradiction by integrating the high strength-to-cost ratio of natural frustules with the functional requirements of energy storage devices.
Solution Approach 2:
The patent utilizes the inherent porous structure of diatom frustules to maintain mechanical strength while enabling ion transport. The porous architecture provides both structural support under compressive pressure and pathways for ionic species mobility, resolving the contradiction between strength and manufacturability by leveraging the natural properties of the frustule material.
2Strength
If layer thickness is increased to improve structural integrity, then mechanical strength is improved, but uniformity of thickness and manufacturing precision deteriorate
Solution Approach 1:
The patent segments the electrode structure into multiple layers containing individual diatom frustules. Each frustule acts as an independent structural unit that maintains uniform thickness distribution throughout the layer. This segmentation prevents thickness variation and ensures manufacturing precision while collectively providing the required structural integrity through the aggregated effect of numerous uniform units.
Solution Approach 2:
The patent changes the physical parameters of the electrode material by incorporating frustules with specific size distributions and aspect ratios. By controlling these parameters, the patent achieves both structural integrity and uniform thickness, as the frustule dimensions can be optimized to maintain consistency across the entire layer while providing the necessary mechanical strength.
3Reliability
If conductive materials are added to enhance conductivity, then electrical conductivity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent employs the self-service principle by utilizing the natural surface properties of diatom frustules to enhance conductivity. The frustules inherently possess surface features that facilitate charge transfer and ionic species mobility without requiring additional conductive additives. This approach improves conductivity while avoiding the complexity associated with multi-material construction and additional manufacturing steps.
Solution Approach 2:
The patent applies local quality by concentrating conductive properties at specific locations on the frustule surfaces rather than throughout the entire structure. Surface modifications or coatings are applied only where needed to enhance conductivity, maintaining simplicity of the overall device structure while achieving the required electrical performance at critical interfaces.
4Reliability
If porous structure is increased to enhance ion mobility, then ionic species flow is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent utilizes porous materials by incorporating diatom frustules with optimized pore structures. The porous architecture provides pathways for ionic species flow while the overall frustule structure maintains mechanical strength. The key is that the pores are distributed throughout the frustule framework, allowing ion transport without compromising the structural integrity of the individual frustule units.
Solution Approach 2:
The patent employs composite materials to resolve the contradiction between porosity and strength. By combining the porous frustule structure with appropriate matrix materials or surface treatments, the patent achieves both high ionic conductivity and mechanical strength. The composite structure allows the porous frustules to provide ion pathways while the surrounding matrix or surface modifications reinforce the mechanical properties.
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 diatom frustules in energy storage devices improves mechanical strength, reliability, and efficiency by maintaining uniform layer thickness and enabling cost-effective fabrication, while also enhancing conductivity and mobility of ionic species, thus improving device performance and energy storage density.
Implementation Method 1
Frustules may comprise significant mechanical strength or resistance to shear stress, for example due to the dimensions of the frustule, frustule shape, porosity, and/or material composition
Implementation Method 2
The frustules can provide structural support for an energy storage device layer and help the energy storage device layer to maintain a uniform or substantially uniform thickness
Implementation Method 3
Porous frustules can allow unimpeded or substantially unimpeded flow of electrons or ionic species. Frustules may comprise varying porosity, having numerous pores or slits. Pores or slits of frustules may vary in shape, size, and/or density
Implementation Method 4
Frustules including surface structures or material can increase conductivity of a layer
Data Source
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AI summary
An energy storage device can include a cathode having a first plurality of frustules, where the first plurality of frustules can include nanostructures having an oxide of manganese. The energy storage device can include an anode comprising a second plurality of frustules, where the second plurality of frustules can include nanostructures having zinc oxide. A frustule can have a plurality of nanostructures on at least one surface, where the plurality of nanostructures can include an oxide of manganese. A frustule can have a plurality of nanostructures on at least one surface, where the plurality of nanostructures can include zinc oxide. An electrode for an energy storage device includes a plurality of frustules, where each of the plurality of frustules can have a plurality of nanostructures formed on at least one surface.