Vanadium Arsenate Microporous Frameworks for Energy Storage
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Solution Overview
Problem
Current electrically conducting materials for energy storage applications, such as ultracapacitors and battery electrodes, face limitations due to random pore sizes and low energy and power densities, with a need for materials that can efficiently store electrical charge and support fast recharge times.
Innovation Solution
Development of vanadium arsenate or vanadium phosphate frameworks with tailored pore sizes and conductivity, allowing for the housing of water molecules and organic or inorganic cations, which can be synthesized using specific reagents and templates to create microporous, mixed-conducting materials with enhanced electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If high-surface-area activated carbonaceous materials are used for electrical energy storage, then large surface area is achieved, but random pore sizes and broad distributions lead to sub-optimal charge packing
Solution Approach 1:
The patent employs zeolite framework materials with inherently ordered porous structures to achieve both high surface area and uniform pore size distribution. The crystalline nature of zeolites provides well-defined pore geometries that enable optimal charge packing while maintaining large surface area for energy storage
Solution Approach 2:
The patent modifies the chemical composition and structural parameters of zeolite frameworks to achieve electrical conductivity while maintaining the ordered porous structure. By controlling synthesis conditions and framework composition, the material achieves both uniform pore sizes and conductive properties
2Manufacturing precision
If nano-carbon materials are used to improve pore size and distribution, then better pore uniformity is achieved, but bulk production remains difficult
Solution Approach 1:
The patent utilizes zeolite materials that naturally possess uniform microporous structures with pore sizes in the 0.3-2 nm range, eliminating the need for complex nanoscale manufacturing processes while achieving consistent pore size distribution across bulk quantities
Solution Approach 2:
The patent employs standard hydrothermal synthesis methods with controllable parameters to produce zeolite frameworks in bulk quantities with consistent pore size distribution, making the material economically viable for large-scale energy storage applications
3Manufacturing precision
If conventional zeolite materials are used for energy storage, then efficient charge packing is achieved, but electrical insulating properties limit charge mobility
Solution Approach 1:
The patent creates composite functionality within the zeolite framework by incorporating conductive species or modifying the framework composition to achieve both electrical conductivity and maintained porous structure. This allows the material to simultaneously provide efficient charge packing and charge mobility
Solution Approach 2:
The patent modifies the chemical composition and electronic structure of the zeolite framework through controlled synthesis to achieve electrical conductivity while preserving the ordered porous architecture that enables efficient charge packing
4Quantity of substance
If microporous zeotype frameworks with pore sizes of 0.3-2 nm are created, then optimal charge storage density is achieved, but material complexity increases
Solution Approach 1:
The patent exploits the inherent microporous structure of zeolite frameworks, which naturally provide high surface area and uniform pore sizes in the 0.3-2 nm range, enabling optimal charge storage density without requiring additional complex structural modifications
Solution Approach 2:
The patent utilizes the zeolite framework's ability to simultaneously provide structural order, porous architecture, and (through modification) electrical conductivity, making a single material system capable of multiple functions needed for high-performance energy storage
Data Source
AI summary
Electrically conducting vanadium arsenate or vanadium phosphate materials are described. The materials include a vanadium arsenate or vanadium phosphate framework structure about organic template and water molecules which may be removed to leave a microporous structure. The three-dimensional vanadium framework may provide electronic conductivity, while the extra-framework constituents may provide ionic conductivity.