3 ms·
Fwiw, EVE's lf560k lifepo4 cell is finally out now & supposedly good for 12k cycles. I haven't heard the term faradaic efficiency before but im super super sup
by jauntywundrkind 3y ago
Fwiw, EVE's lf560k lifepo4 cell is finally out now & supposedly good for 12k cycles.
I haven't heard the term faradaic efficiency before but im super super super happy to hear of it! I've been so curious, I just never had the term. Apologies if I mess this up but it seems to be the efficiency of turning input charge to stored charge. So curious but never figured out what kind of figures to expect from lipo or lifepo4.
I'm not sure if there's another term for efficiency of that stored charge being released/sourced, or if that tends to be >99% in most processes or what not.
- thereisnospork 3y agoFaradiac efficiency is essentially electron counting: e.g. at 100pct efficiency you need a mole of electrons to convert a mole of Li+ to Li0. At 50pct 2 moles. Moles of electrons can be converted to amp-hrs for a more conventional unit. Numbers are probably reasonably high (99+%) for commercial batteries, as the only two losses are ohmic (electric conduction through the cell, which is roughly the self discharge rate) and chemical (side reactions of electrolyte - which result in the degredation of the cell. If you want so dive further down the rabbit-hole look up the Nernst equation. Comes up more in electrochemistry than batteries, as energy efficiency is the dominant factor in the latter (watts_out/watts_in), noting that faradiac efficiency doesn't consider voltage.