Unlock instant, AI-driven research and patent intelligence for your innovation.
A kind of COF/PBI film for all-vanadium redox flow battery and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An all-vanadium flow battery and film-forming technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as low voltage efficiency, slow proton transfer rate, and inoperable batteries, and achieve increased battery life and high chemical stability. performance, high cell coulombic efficiency and voltage efficiency
Active Publication Date: 2022-04-12
DALIAN UNIV OF TECH
View PDF6 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The coulombic efficiency of the battery based on the dense PBI film is 20-80mA / cm 2 Up to 99% at current density, but its voltage efficiency is low, and the proton transfer rate is slow at high current density, making the battery unable to work
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] Synthesis of SNW-1: Under the protection of nitrogen, put 0.313g melamine and 0.5g terephthalaldehyde in a three-necked flask, then add 15.5ml DMSO to it, raise the temperature of the oil bath to 180°C, under the conditions of magnetic stirring and condensation Reaction 72h. After the reaction was completed, it was cooled to room temperature, filtered to obtain an off-white powder, washed repeatedly with acetone, dichloromethane, and tetrahydrofuran for several times, and then the washed product was dried overnight in a vacuum oven to obtain an off-white powder.
[0027] Preparation of COF / PBI blend membrane: Add 0.01g SNW-1 into a 10ml one-necked flask, add 5mL DMAc to it, ultrasonically disperse and stir for 6h until the dispersion is uniform. Then add 0.09g PBI material to it, stir at 80°C for 6h to form a uniform casting solution, the doping amount of casting solution SNW-1 is 10%, cast the casting solution in a glass mold of 5×5cm, and dry at 35°C After 48h, a 30u...
Embodiment 2
[0029] The synthesis of SNW-1: with embodiment 1
[0030] Preparation of COF / PBI blend membrane: Add 0.02g SNW-1 into a 10ml one-necked flask, add 5mL DMAc to it, ultrasonically disperse and stir for 6h until the dispersion is uniform. Then add 0.0g PBI material to it, stir at 80°C for 6h to form a uniform casting solution, the doping amount of casting solution SNW-1 is 20%, cast the casting solution in a glass mold of 5×5cm, and dry at 35°C After 48h, a 33um blend film was obtained.
Embodiment 3
[0032] The synthesis of SNW-1: with embodiment 1
[0033] Preparation of COF / PBI blend membrane: Add 0.03g SNW-1 into a 10ml one-necked flask, add 5mLDMAc to it, ultrasonically disperse and stir for 6h until the dispersion is uniform. Then add 0.07g of PBI material, stir at 80°C for 6h to form a uniform casting solution, the doping amount of casting solution SNW-1 is 10%, cast the casting solution in a glass mold of 5×5cm, and dry at 35°C After 48 hours, a blend film of 35-40um was obtained.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention discloses a COF / PBI membrane used for an all-vanadium redox flow battery and a preparation method thereof, belonging to the field of energy storage. First, terephthalaldehyde and melamine are used to synthesize a covalent organic framework in an inert atmosphere, then a solvent is added and stirred evenly, and then mixed evenly with polybenzimidazole to form a casting solution, and finally cast into a film. In the present invention, a COF with micropores is firstly synthesized, and the pores of the COF can be used to sieve two kinds of ions with high selectivity. The COF and polybenzimidazole were blended to form a membrane, which improved the hydrogen ion conductivity of the PBI membrane. The prepared membrane has high battery performance, high chemical stability and long life at the same time.
Description
technical field [0001] The invention belongs to the technical field of energy storage, and relates to a COF / PBI film used for an all-vanadium redox flow battery and a preparation method thereof. Background technique [0002] Renewable energy sources such as solar energy and wind energy have unstable, discontinuous, and uncontrollable unsteady characteristics, which will have a great impact on the stability and security of the power grid. The combination of large-scale high-efficiency energy storage technology and renewable energy power generation technology can overcome the unsteady shortcomings of these energy sources. Flow batteries perform well in large-scale energy storage technology due to their advantages of easy scale, no pollution, and safety. application prospects. [0003] All-vanadium redox flow batteries have established large-scale commercial demonstration projects because the positive and negative active materials are all vanadium species, which avoids cross-c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More