tomw, I got this from WIKI on Cathode. "Cathode polarity <http://en.wikipedia.org/wiki/Electrical_polarity> with respect to the anode <http://en.wikipedia.org/wiki/Anode> can be positive or negative; it depends on how the device operates. Although positively charged cations <http://en.wikipedia.org/wiki/Ion> always move towards the cathode (hence their name) and negatively charged anions <http://en.wikipedia.org/wiki/Ion> move away from it, cathode polarity depends on the device type, and can even vary according to the operating mode. In a device which consumes power, the cathode is negative, and in a device which provides power, the cathode is positive:"` http://en.wikipedia.org/wiki/Cathode
I always find this +/- anode/cathode anion/cation business annoying. Does a battery consume power when it is charging or does it provide power when it is discharging? I can see why Dahn always talks about the positive and negative electrodes and never says anode or cathode. I think I had better adopt that nomenclature myself. If you want to check out the video around the 12 minute mark, you will see the positive electrode on the left in his diagram. Dahn always talks about the positive electrode (the LiFePO4 side) delithiating and becoming reactive during charging with the ions moving to the GRAPHITE negative electrode. Is that better for you? On Thu, Feb 26, 2015 at 10:04 AM, tomw via EV <[email protected]> wrote: > The anode is graphite, cathode is LiFePO4 for LFP cells. > > I just heat mine to 65F while the car is parked at home similar to Rick. > Have almost the same range in winter as summer with the cabin heater off as > a result. This is the sixth winter for the car. > > I think there is quite a lot known about lithium chemistries and main > effects for cycle life, but not by diy ev'ers. Additives to the > electrolyte > can make a big difference to cell performance. See e.g.: > > https://www.youtube.com/watch?v=9qi03QawZEk > > Note that the company wouldn't tell him what the additives were. Same with > any tech industry, the insiders know much more than outsiders like us know. > Don't infer they are ignorant just because we are. > > > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/Cold-Charging-Lithium-Experiences-tp4667675p4673983.html > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150226/5fd63402/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
