Hydroxy-Binder MOF Sintered Body for Low-Temperature Thermal Control
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Solution Overview
Problem
Batteries in electric vehicles face rapid degradation at high temperatures and insufficient voltage output at low temperatures, necessitating effective temperature control while maintaining the adsorption performance of metal-organic frameworks (MOFs) with low heat resistance.
Innovation Solution
A MOF sintered body is created using a binder with a hydroxy group, specifically silica, to ensure firm sintering at low temperatures while preserving adsorption performance, allowing for temperature control of batteries through heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a binder is added to sinter the MOF into a bulk body, then the MOF can be sintered firmly, but the adsorption performance of the MOF decreases
Solution Approach 1:
The invention changes the chemical parameters of the binder by selecting materials with specific functional groups (carboxyl, hydroxyl, or amino groups) that have high affinity for MOF surfaces. This chemical parameter change enables strong bonding between binder and MOF particles, achieving firm sintering while minimizing the binder quantity needed, thus preserving adsorption performance.
Solution Approach 2:
The invention creates a composite material system where the binder and MOF form a synergistic combination. The binder provides structural integrity through chemical bonding, while the MOF maintains its adsorption functionality. The composite structure allows the binder to act as a bridge between MOF particles without blocking the pores of individual MOF crystals, preserving overall adsorption performance.
2Strength
If the MOF is sintered at a high temperature, then the sintering firmness increases, but the MOF structure is damaged due to low heat resistance
Solution Approach 1:
The invention changes the thermal parameter by conducting sintering at low temperatures (typically below 200°C, often between 50-150°C). This temperature parameter change prevents thermal decomposition of the MOF structure while achieving sufficient sintering firmness through the chemical bonding mechanism provided by functional group interactions between the binder and MOF surface.
3Strength
If the binder content is increased to improve sintering firmness, then the structural strength increases, but the heat storage density of the MOF sintered body decreases
Solution Approach 1:
The invention optimizes the quantity parameter of the binder, specifying it should constitute 1-50 wt% of the total sintered body (with preferred ranges of 5-30 wt%). This quantitative optimization ensures sufficient structural strength through chemical bonding while limiting the binder amount to preserve the majority of the MOF's heat storage capacity, maintaining high heat storage density.
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 MOF sintered body effectively controls battery temperatures by adsorbing and desorbing adsorbates, maintaining sufficient adsorption performance and preventing heat storage density loss, thus ensuring stable battery operation across temperature extremes.
Implementation Method 1
a binder having a hydroxy group is mixed with a MOF having a terephthalic acid-based ligand, a MOF can be sintered sufficiently firmly at a low temperature
Implementation Method 2
an adsorbate such as water or carbon dioxide adsorbed on a MOF is desorbed from the MOF by heat of the battery to thereby store latent heat in the MOF
Implementation Method 3
an adsorbate such as water or carbon dioxide is adsorbed on the MOF to thereby release latent heat from the MOF and warm the battery by heat generation during this process
Implementation Method 4
The MOF sintered body is installed in a moving body and is configured to exchange heat with a battery that supplies electric power
Data Source
AI summary
An object of the present invention is to sinter a MOF sufficiently firmly at a low temperature while ensuring the MOF sufficient adsorption performance. The present inventors have found that if a binder having a hydroxy group is mixed with a MOF having a terephthalic acid-based ligand, a sufficiently firm MOF can be obtained by sintering at a low temperature while ensuring sufficient adsorption performance, and thus the present invention has been completed. The MOF sintered body of the present invention contains a MOF having a terephthalic acid-based ligand and a binder having a hydroxy group OH. According to the present aspect, the sufficiently firm MOF can be obtained by sintering at a low temperature while ensuring sufficient adsorption performance.