Material composition for use in hydrogen storage structure, material for use in hydrogen storage structure, and hydrogen storage single tube
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Solution Overview
Problem
Current high-pressure hydrogen storage containers using hollow inner tanks with carbon fiber coatings face safety risks due to high dynamic pressure and temperature, and rely on expensive imported materials, limiting their safety, stability, and economic viability.
Innovation Solution
A composite material composition for hydrogen storage structures, comprising polyimide, metal chlorides, metal oxides, and rare earth oxides, is developed, which forms a micrometer-scale honeycomb-like structure to enhance safety and stability, replacing traditional carbon fiber materials and reducing container size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick coating of carbon fibers is used to achieve high pressure strength, then pressure resistance is improved, but safety risk increases due to unpredictable breaking and aging during service life
Solution Approach 1:
The patent divides the storage container into multiple independent hollow spherical shells instead of using a single thick-walled structure. Each shell can independently withstand pressure, and if one shell fails, others remain intact, preventing catastrophic failure. This segmentation resolves the contradiction by maintaining pressure resistance through multiple thin shells while improving safety through isolation of potential failure points.
Solution Approach 2:
The patent uses composite material structure combining multiple hollow spherical shells with different material properties. The outer shell uses high-strength material for pressure resistance, while inner shells provide additional safety layers. This composite approach maintains structural strength while enhancing reliability through material diversity and functional differentiation.
2Quantity of substance
If hollow inner tank structure is used for high pressure storage, then storage capacity is improved, but safety risk increases due to critical high pressure generation at high temperature under dynamic conditions
Solution Approach 1:
The single hollow inner tank is divided into multiple smaller hollow spherical shells arranged in parallel. This segmentation reduces the volume and pressure concentration in each individual shell, preventing the generation of critical high pressure under dynamic conditions while maintaining total hydrogen storage capacity through the combined volume of multiple shells.
Solution Approach 2:
The patent introduces porous thermal insulation material in the spaces between the hollow spherical shells. This porous structure provides thermal isolation, reducing heat transfer to the hydrogen storage shells and preventing temperature-induced pressure increases, thereby mitigating the harmful effects of high temperature under dynamic conditions.
3Quantity of substance
If multiple 35 MPa storage units are connected in parallel to achieve 35 MPa storage, then storage capacity is improved, but safety risk multiplies
Solution Approach 1:
The patent merges multiple storage functions into a single integrated container structure with multiple hollow spherical shells. Instead of connecting separate 35 MPa storage units in parallel, the shells are contained within a single unified structure with common safety features, reducing the number of connection points and potential failure interfaces while maintaining total storage capacity.
Solution Approach 2:
The patent incorporates thermal insulation material and structural design that provides beforehand cushioning against pressure and temperature fluctuations. The insulation layer acts as a buffer against external temperature changes, while the segmented shell structure provides pressure distribution, preventing sudden pressure spikes that could lead to safety incidents.
4Reliability
If automatic release mechanism is added to prevent high pressure at high temperature, then safety is improved, but hydrogen loss increases
Solution Approach 1:
The patent uses thermal insulation material placed beforehand in the spaces between shells to cushion against temperature-induced pressure increases. This passive thermal barrier prevents the formation of critical high pressure conditions, eliminating the need for active release mechanisms that would cause hydrogen loss, thereby maintaining both safety and substance retention.
Data Source
AI summary
Provided is a material for use in a hydrogen storage structure, a hydrogen storage single tube, and a material composition for a hydrogen storage structure used for the preparation of the material for use in the hydrogen storage structure and the hydrogen storage single tube. The hydrogen storage single tube is provided with a honeycomb- shaped high pressure hydrogen storage structure with a micron-sized pore diameter and is lightweight. A hydrogen storage structure having a pore diameter of 150 μm and a pipe wall thickness of 35 μm has an ultimate pressure of >200 MPa, a Rockwell hardness of 86-89, a high temperature resistance of >1900° C., a low temperature resistance of <−260° C., low thermal conductivity, high temperature thermal insulation, and strong acid and alkali resistance. In a high density hydrogen work atmosphere and a complicated dynamic environment, the high pressure hydrogen storage structure is very stable.