Battery basics - An introduction to the science of lithium-ion batteries

Elections flow externally from cathode to anode 😂, otherwise ok 👍

Thanks!

Can you explain reduced battery capacity when cold? If I charge a battery with say 100Ah, and it gets cold, how exactly is the capacity reduced? Is the Ah reduced, (eg I can only get 95Ah out), or does the voltage drop faster resulting in less Wh out? I do believe the ESR increases, so if pulling higher currents more power is lost in the ESR. But if pulling low current, say 0.05C, ESR increase would have a small impact on ability to get energy out.

A very nice and concise presentation. You must have spent a lot of time to compress the vast amount of material into easily digestible material. It is commendable that you have put it for free on you tube. There is nothing more valuable than sharing knowledge.

Thank you for the video, I am starting to work with batteries and it is really helpful!

Thank for this usefull and detailed video !

great and useful stuff, summaries bunch of material in a short time, really appreciate your effort.

Man people say magic isn't real but fucking electricity and magnets are basically goddamn fucking magic if you ask me.

You are GREAT...!!! Never stop making your fantastic vids..!

nice informative ..........thank you sir

It is madness to allow the greed of political power to drive the embellishment of de-carbonization. That said, let us move forward with battery development without the larceny of tax breaks and subsidies for EVs..

excellent presentation

Great video - thanks. What about the LFMP cathode, does this feature in the future roadmap?

Very informative video. Could you please enlighten me on the reason behind selecting Transition metals for cathode chemistry?

Hi Billy I am still a bit confused about the process of the charging of the Li-ion cell. When a lithium ion cell is connected to a DC source, the electric field applied forces the lithium ions to move from the cathode through the electrolyte to the graphite anode. Meanwhile electrons move through the outside circuit and again end up in the graphite. These electrons would be same number as the lithium ions. Presumably therefore the lithium ions have now recovered their charge, and the cell become electrically neutral. But it obviously isnt! So what have I missed? . John F

It's just mind blowing...a great effort towards knowledge sharing..a very reliable and knowledgeful resource to learn about battery basics....kudos Dr. Billy...keep up the good work

Mr. Wu please contact me to discuss potential sustainable replacements. Ray

Dr Dr Wu In your excellent video the examples you give show are cylindrical cells, not much larger than AA cells. I have found suppliers offering Prismatic Cell LiFePO4 Cells from EVE offering 280 Ah at 3.2 v giving 896Wh. I presume that the capacity is dependent on the area of the anode and cathode, i.e the amount of Li ions that can be generated. And that a so called prismatic cell/battery will have more area for the electrodes. Is that broadly correct? Best wishes John

Great presentation Professor, are nuclear energy generation on a smaller scale, nuclear fusion will be considered as a source of potential energy generation once further safety & R&D has been conducted on utilizing Uranium 238 or Cobalt 60?

Thank you very much for this talk. It is excellently presented. Well done!

Excellent video, well done and extremely informative.

Beautiful intro to Li ion batteries from a 360 dég point of view

Please make a general video on Sodium ion battery (Cathodes and anodes)... How it is comparable to Li ion battery..

very educative & many thanks for sharing

Please upload the vedio of heart of Na-ion Batteries also ...nice vedio

Does lithium have the same "memory effect" as nickel-cadmiun?

Dr, I saw both videos, those are very nice and informative. Can you suggest book name to understand Li as element in detail. Thanks.

great information pack

👍Well done! Most of the important Li battery attributes explained in a short video, best I've come across.

Very useful information for someone likes me who has zero knowledge on battery. Thank you for the effort

👍🏻

too boring to pick up any understanding. next time give it some life - not like reading a text-book.
go less words per minute, half as much.

Bugging me for a while now is "why do manufacturers make single-layer cells instead of 2-layer cells"?
If they adhered anode graphite to both sides of the anode metal sheet, cathode nickel to both sides of the cathode metal sheet, and jellyrolled round batteries with one additional separator sheet, they would have, on packaging and pumping in electrolyte, a cell with just slightly lower current but double the voltage, with slightly less anode and cathode metal sheet than a single-layer cell.

A 1.8 times increase of energy density.

Hi Prof. Wu...very nice and clean presentation and was really useful information. Thanks

Great overview of the battery basics! Thanks for sharing.

Excellent 101 on batteries - simple, clean and organized! Thank you!

Hi there I enjoyed your video. One thing is not clear to me though; when a Li Ion battery is discharging the LI ions must flow from the anode to the cathode how do the ion's overcome the 3.7v potential ???? and if you can point me to paper that talks about this that would be great!! - well no reply from Billy so this is not the guy to ask questions of

As a denizen of Canada, how would our rather nasty winter temperatures going to affect battery efficiency?

Thanks Dr. Wu, this was very interesting and well explained

Dr. Billy Wu... I have an introduction for you. Dr. Wu... meet the first general purpose transport that runs off of mostly Diesel, Coal, LNG, Nuclear Power, and hydroelectric generation -- and to much smaller extent: wind turbines, solar cells, and gasoline, ethanol. It's name is Tesla. Give yourself a huge pat on the back for saving the planet from rising a 0.1 degrees F over the next 50 years. Maybe they can build a statue after you someday -- that is if it's not ecologically deleterious, and so long as BLM or Antifa don't tear it down.

thanks for this video...very informative

Hello Dr. Wu, excellent video. Can you recommend a book who is just getting started into LIBs and their thermal management? Thanks.

Perfect. Thank you!

Thank you for a great lecture. I wonder if you wouldn't mind answering a question - do you think it is feasible for batteries at some point to reach energy density parity with thermal engines operating on hydrocarbon fuels ~ 10 MJ/kg. This means the battery pack for a BEV would have to increase by a factor of roughly 10 compared to the state of the art today (Tesla).

EXCELLENT, comprehensive and thorough video, presented in a succinct and straightforward fashion. Thanks so much!

Prof. Wu, thank you very much for this Lecture.

Thanks Dr Wu! How we can quantify the power density of a battery? Imax*Vnom?