Wow, you have done a lot of research for this video, and it shows from the amount of information you display and also convey. Very impressed and very fond of your channel. Best regards.
Hi Cayrex, nice !!! You should design and print your molds with some degrees of bevel on all your SIDE walls (not to much). It will be much more easier to extract them, without damaging them.
When measuring a materials conductivity you need to measure it over a known surface area. Conductivity = siemen/(meter²), and siemens=1/ohms. and when ohms is around 1ohm or below, you should use the four lead method for more acurate measurements. Two for current and two for voltage sensing.
You need a hydraulic jack and a frame to press them, clamps don't have enough force, and for channels it's best to cut the channel after plates made.but good work any way. you could make a large block and cut the plates from it may be faster.
Yes, I just try to make the plates by hand for now, because the hydraulic jack I will use next time. About the flow channels..... yes you can make it after. But I want to stick to the custom mold which already have the channels in the mold. Because that way the plates are done faster when you make many of them,.... and it is some standard process of making plates with channels.
You might consider a lost wax approach or cook a spaghetti noodle till bendable, form a serpentine shape, let dry to recover strength, then put on bottom of mold. Dissolve the used noodle with hot water.
Hello. I just came across this video while looking for information. I can share something right away that may interest you and others. I bought a graphite foil for making 0.25 mm gaskets. Most importantly, it is very soft. So soft that when I screw the battery together, there is no leak and the liquid does not escape. I am currently testing this graphite gasket, but it looks promising. The resistance of such a graphite foil is about 0.8 Ohm. I am currently waiting for a few things to be printed and delivered. I would also like to test the Zinc Bromine battery. PS: I have a Battery printed from regular resin by Anycubic and when I used it for a while, it did not fall apart. If I know anything more, I will write here and maybe publish the video on my other account ;).
If one put the epoxy in the refrigerator, it would take longer to cure and that would allow for more time mix well with less worry about not going fast enough.
@kreynolds1123 Depending on the epoxy. I know that slower is the curing time stronger will be the "joint". About conductivity..... with 90 min epoxy I get a bit more resistance. But for each epoxy you also need to find the right ratio of conductive material and binder.
Epoxy works by completely binding carbon atoms of the material to be joined with sulfur atoms in the middle of the polyester chain molecules. Could your electrode recipe be improved by using an entrainment matrix material instead of a chemical binder? Also, I'm sure your viewers don't know how any of these plates get their bipolarity. Is the graphite calendared before mechanical pressing to high density and hardness? That would be good to understand. Maybe some mechanical production experiments would greatly expand what you can do with your polymer 3D printing tools. ZAMAK is strong like aluminum, can be molded as a powder and sintered to full integrity, and lead is also very cheap and fun to cast into paper or treated paper or polymer molds, and it has a substantially higher melting point than ZAMAK. I don't know heats of fusion numbers, but lead freezes in paper, and ZAMAK will sinter inside a lead mold, and is far stronger than lead and probably will easily exceed any mechanical requirements you have for pressing these plates yourself.
First, i have some question, in the next time i want to make calcium ion battery (Ca-ion), can i use epoxy resin for binder cathode and anode?, i'm use calcium copper phosphate for cathode and ion calcium sources, i thinks black carbon is good for anode and traps some calcium ion (Ca2+)..
@@alvingaming431 Yes and no. You will make Ca ion cell, which the Ca ions will intercalate into carbon, etc. So the epoxy can isolate some of the active material if you use to much. In the past I try to use epoxy for active binder in the cells,.... but I didn't get the desired effects I was hoping for. You can try to make a small cell to see what you will get.
A bipolar plates are the electrically conducting plates which join together the anode of one cell to the cathode of another. It connects and separates the individual cells in series to form a cell stack with required voltage. So the bipolar plate is in basic only a non reactive conductive plate. Theoretically the plate can be made from almost any conductive material. But in the end is also important that the plate is made from material which will not react with electrolyte if it is exposed to. And for that reasons the bipolar plates are mostly made from graphite or some other carbons.
@cayrex it's that simple , ok. Like wires connecting separate batteries but its internal to the battery. Here's a question, what if you had a flow battery with two different electrolytes, and you have a plate that serves the same electrical connecting function as a bipolar plate but also serves as an active electrode on one side with one of the two electrolytes? Does that have a name? Could you call it a bipolar electrode, or monopolar plate? Don't mind me , maybe I'm thinking too much , but I'm going to stop here before I start getting silly.
@@petevenuti7355 It is still a bipolar electrode. Monopolar electrode is in basic a typical electrode wich have external cell connection and is used like in car batteries, tool batteries,... And most of the time a bipolar or monopolar plates are used as current collectors.
@cayrex got it! so anything that connects two cells together electrically internally is a bipolar plate even if one side of it is active with the electrolyte . Thank you for the clarification!
This is one of my favourite channels on TH-cam!
Wow, you have done a lot of research for this video, and it shows from the amount of information you display and also convey. Very impressed and very fond of your channel. Best regards.
It's great to see a good battery video. It's good to see a great battery video.
Hi Cayrex, nice !!! You should design and print your molds with some degrees of bevel on all your SIDE walls (not to much). It will be much more easier to extract them, without damaging them.
When measuring a materials conductivity you need to measure it over a known surface area. Conductivity = siemen/(meter²), and siemens=1/ohms. and when ohms is around 1ohm or below, you should use the four lead method for more acurate measurements. Two for current and two for voltage sensing.
You need a hydraulic jack and a frame to press them, clamps don't have enough force, and for channels it's best to cut the channel after plates made.but good work any way. you could make a large block and cut the plates from it may be faster.
Yes, I just try to make the plates by hand for now, because the hydraulic jack I will use next time. About the flow channels..... yes you can make it after. But I want to stick to the custom mold which already have the channels in the mold. Because that way the plates are done faster when you make many of them,.... and it is some standard process of making plates with channels.
You might consider a lost wax approach or cook a spaghetti noodle till bendable, form a serpentine shape, let dry to recover strength, then put on bottom of mold. Dissolve the used noodle with hot water.
Hello.
I just came across this video while looking for information.
I can share something right away that may interest you and others.
I bought a graphite foil for making 0.25 mm gaskets.
Most importantly, it is very soft.
So soft that when I screw the battery together, there is no leak and the liquid does not escape.
I am currently testing this graphite gasket, but it looks promising.
The resistance of such a graphite foil is about 0.8 Ohm.
I am currently waiting for a few things to be printed and delivered.
I would also like to test the Zinc Bromine battery.
PS:
I have a Battery printed from regular resin by Anycubic and when I used it for a while, it did not fall apart.
If I know anything more, I will write here and maybe publish the video on my other account ;).
@@tdx110 Yep, is not just like so called a graphite gasket 😁 Yes, make a video that we cam see what you are doing
Nice. how about using a pasta maker, maybe custom rollers?
If one put the epoxy in the refrigerator, it would take longer to cure and that would allow for more time mix well with less worry about not going fast enough.
@@kreynolds1123 Or using 90 min or standard Epoxy
@cayrex do you think the longer cure epoxy has better or worse mechanical/electrical properties?
@kreynolds1123 Depending on the epoxy. I know that slower is the curing time stronger will be the "joint". About conductivity..... with 90 min epoxy I get a bit more resistance. But for each epoxy you also need to find the right ratio of conductive material and binder.
Epoxy works by completely binding carbon atoms of the material to be joined with sulfur atoms in the middle of the polyester chain molecules. Could your electrode recipe be improved by using an entrainment matrix material instead of a chemical binder? Also, I'm sure your viewers don't know how any of these plates get their bipolarity. Is the graphite calendared before mechanical pressing to high density and hardness? That would be good to understand. Maybe some mechanical production experiments would greatly expand what you can do with your polymer 3D printing tools. ZAMAK is strong like aluminum, can be molded as a powder and sintered to full integrity, and lead is also very cheap and fun to cast into paper or treated paper or polymer molds, and it has a substantially higher melting point than ZAMAK. I don't know heats of fusion numbers, but lead freezes in paper, and ZAMAK will sinter inside a lead mold, and is far stronger than lead and probably will easily exceed any mechanical requirements you have for pressing these plates yourself.
It’s like making a very messy cake
First, i have some question, in the next time i want to make calcium ion battery (Ca-ion), can i use epoxy resin for binder cathode and anode?, i'm use calcium copper phosphate for cathode and ion calcium sources, i thinks black carbon is good for anode and traps some calcium ion (Ca2+)..
@@alvingaming431 Yes and no. You will make Ca ion cell, which the Ca ions will intercalate into carbon, etc. So the epoxy can isolate some of the active material if you use to much. In the past I try to use epoxy for active binder in the cells,.... but I didn't get the desired effects I was hoping for. You can try to make a small cell to see what you will get.
I'm sorry for my naive question but what makes it bipolar?
A bipolar plates are the electrically conducting plates which join together the anode of one cell to the cathode of another. It connects and separates the individual cells in series to form a cell stack with required voltage. So the bipolar plate is in basic only a non reactive conductive plate. Theoretically the plate can be made from almost any conductive material. But in the end is also important that the plate is made from material which will not react with electrolyte if it is exposed to. And for that reasons the bipolar plates are mostly made from graphite or some other carbons.
@cayrex it's that simple , ok. Like wires connecting separate batteries but its internal to the battery.
Here's a question, what if you had a flow battery with two different electrolytes, and you have a plate that serves the same electrical connecting function as a bipolar plate but also serves as an active electrode on one side with one of the two electrolytes?
Does that have a name? Could you call it a bipolar electrode, or monopolar plate?
Don't mind me , maybe I'm thinking too much , but I'm going to stop here before I start getting silly.
@@petevenuti7355 It is still a bipolar electrode. Monopolar electrode is in basic a typical electrode wich have external cell connection and is used like in car batteries, tool batteries,... And most of the time a bipolar or monopolar plates are used as current collectors.
@cayrex got it! so anything that connects two cells together electrically internally is a bipolar plate even if one side of it is active with the electrolyte . Thank you for the clarification!