Preparation of a Nafion Fuel Cell
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- čas přidán 13. 08. 2012
- Full procedure can be found at: education.mrsec.wisc.edu/prep...
Fuel cells are devices that convert a fuel and an oxidant directly into electricity. In this manner, they are similar to batteries. However, a battery has a limited amount of chemical reactants stored inside its case and once these reactants are consumed the battery is either discarded or must be recharged to replentish the reactants. A fuel cell, on the other hand, will continue to generate electricity as long as it is supplied with fuel and oxidant.
In a fuel cell a fuel, such as hydrogen or methanol, is electrochemically oxidized to produce electrons. These electrons are forced through a load by an electronically insulating electrolyte and react at the cathode to electrochemically reduce the oxidant. The electrolyte conducts ions between the anode and cathode to balance the charge flowing through the load. In order to increase the rate of reaction at the anode and cathode, electrocatalysts, such as platinum, are used to promote the oxidation and reduction reactions. In this activity a polymer-electrolyte membrane (PEM) is used as the electrolyte. When this PEM is soaked with water it conducts protons generated at the anode by the oxidation of the fuel to the cathode where they combine with oxygen to form water.
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Thank you, I would like to look back on this video one day and get a sense of warm feelings that u were there for me when I needed your help. Thank to all the Dads and Moms, founders of our new world who are there, and continue to be there.
Just use armorphous nickel electroplated onto graphite beads or graphite plates ! And use it then in a KOH water solution, so it is an alkaline based fuel cell ! One electrode will be the nickel plated graphite and the air (O2) electrode will be just pure graphite plate....! Much easier and cheaper than your method ! And will have much more power...The H2 needs to be applied below the nickel coated graphite ! Regards, Stefan.
Can a graphite sheet be an air cathode without being porous! I guess note! I am working on metal air batteries and I need to know!
@@jrath2001 and you just explain me how battery works using air!?
@@omsingharjit The cathode in such batteries allows Oxygen from air to take part in reaction instead of using any other material (like a metal) as cathode. Search 'metal-air' for whole lot of info ! Anything further, let me know...
А как Вы делали подобный? Можете подсказать поэтапно?
The materials list can be found at the end of the video and more information can be found at the link listed in the Video Description.
What is the solution that you used in Step 14? That gave a higher voltage than flushing the nafion membrane with hydrogen?!
What was that screen made of in this video? I doubt it was pure platinum.
It would have been much better if you have narrated along with the video.
where i can get Nafion membrane and what is the micron
I did not understand the step 15 to explain further?
the cost of the chloroplatinic acid is way too much ! sir, can you please let me know an alternative to that as soon as possible, because i need to make this within next 3 days for a project submission worth 50 marks.
how to make Proton exchange membrane
Un craillon comme conducteur HHO...that is Smart idea.
Peut-etre, sans le bois et seulment le graphite result meilleur.
A video narration would be nice...
Could I contact you guys to get pacific instructions on how to build that I would be willing to pay something I was wondering if you were using Platinum for your screen
I read something similar out of Virginia Tech that used a Nafion membrane and Maltodextrin as the fluid. I'm not much of a chemist, but your design seems a little more ingenious. Do you know if that chemical would work in your design? Thanks for the post :)
+Schuyler Ankele There are two liquids used in this video besides the epoxy. which of the liquids in this video were replaced by maltodextrin? it would be of so much help if u could also let me know an alternate to the chloroplatinic acid used in the electrolysis step.
Divyansh Jindal from what I understand in the battery being developed by Virginia Tech the two substance are water and a maltodextrin and sodium phosphate I think. I'm not a chemist by any stretch. Here is the article www.nature.com/ncomms/2014/140121/ncomms4026/full/ncomms4026.html
+Schuyler Ankele thanks for the help brother! :)
@@divyanshjindal2582 добрый день. Вы занимаетесь топливными элементами?
nice but its not complete method please upload with name material you used
Cut Nichrome screen into 1″ x 2″ pieces. Remove some wood from a pencil to expose the graphite in the middle, such that an alligator clip can be connected. Place the nichrome screen and the graphite pencil in a ~7 ml solution of chloroplatinic acid connected to a DC power supply at 12-13 volts, and begin the electrolysis. The current should be about 0.2-1.0 milliamps. Electrolysis of platinic acid will deposit platinum metal on the Nichrome sheet . Deposit platinum for about 15-30 minutes. As the solution is electrolyzed, hydrogen may be evolved. Shake the electrode to remove hydrogen bubbles so that all the Nichrome stays in contact with the electrolysis solution. The platinum-coated portion of the Nichrome will look darker. This is due to the roughness of the platinum coating. Obtain two syringe barrels after removing and discarding the plungers. Place the screen in a petri dish on a hotplate. Melt the syringe barrel onto the platinum-coated portion of the screen. Lift the screen with tweezers, and quickly move it to the benchtop and apply pressure to the syringe barrel to form a smooth flat surface before the plastic solidifies. There should be platinized screen covering the opening in the tube. Repeat a second time. Bend the uncoated screen away from the opening. Obtain a 1″ x 1″ square of Nafion membrane. Prepare 5-minute epoxy. Spread epoxy around the opening on each tube. Glue the Nafion membrane between the screens. Apply pressure continually while you wait for the epoxy to harden. Heat the end of the tweezers and melt a hole near the end of one syringe. (Thus will allow air to leave when you squirt water in the existing opening.) Add water and check for leaks. The lower compartment is exposed to the atmosphere (oxygen). To the top compartment, add a fresh solution of aqueous sodium borohydride as a hydrogen source and measure the voltage produced by the fuel cell. Alternatively, the upper compartment is exposed to the atmosphere (oxygen). Flush the lower compartment with hydrogen gas and measure the voltage produced by the fuel cell. You can demonstrate that the voltage depends on the hydrogen concentration by alternately flushing with hydrogen gas and helium gas.
Hi. What is this glue that you used to hold the nafion membrane?
Hi Mohammad, this protocol uses epoxy to glue the nafion membrane. Hope that helps!
@@WisconsinMrsec а подскажите что за металлическая сетка?
what else can be used instead of Nafion?
Fumasep AEM - Anion Electrolytic Membrane Polymer from FuMA-Tech
www.fuelcellstore.com/fuel-cell-components/membranes/fumatech-membranes/fumatech-aem?page=2
PVA and boric acid. Put it on woven glass
Nylon will not work
HAI
** AIN'T NO WORDS or music - suitably edited so that cxannot know materials to make
Step 1: ruin scissors.
Ok
ohhhh c'mon little more verbal description, please
Hi Tamoghna, these videos were originally created as "Video Lab Manuals" and don't have accompanying narration. We are changing that moving forward due to feedback like yours. You can find the full written description and instructions at: education.mrsec.wisc.edu/preparation-of-a-fuel-cell-nafion/
nafion is fucking expensive, not an economic idea at all
There is littler relationship between the car and the thing you made. This is a lie steven:)
I have to go with a Thumbs down on the video, because it doesn't stand on it's own. What are the materials, the reactions, any concerns/issues, and WHAT ARE YOU DOING?
Hi Kevin, you can find the materials list, quick background, and written instructions here: education.mrsec.wisc.edu/preparation-of-a-fuel-cell-nafion/