The discussion revolves around the search for rechargeable battery types that do not lose capacity over time. Participants explore various battery technologies, including lithium-ion, NiFe, and liquid metal batteries, while considering their longevity and degradation characteristics.
Participants express a range of views on battery longevity, with no consensus on a specific type of battery that completely avoids capacity loss over time. Multiple competing technologies and their respective characteristics are discussed.
Participants mention various factors affecting battery life, such as temperature and discharge rates, but do not resolve the implications of these factors on overall battery performance.
I recall people boasting in another forum that they have a particular type of secondary cell that is still going strong after a few decades of use. I think they were talking about the NiFe cell. You used to be able to buy them dry and you'd fill them with your own KOH solution. They were not sealed (in today's terminology), and not what you'd call high capacity.radaballer said:Lithium ion batteries infamously degrade over time. 1000 charges can cause up to 20% loss in capacity. Is there a type of rechargeable battery that will not degrade over time?
NascentOxygen said:I recall people boasting in another forum that they have a particular type of secondary cell that is still going strong after a few decades of use. I think they were talking about the NiFe cell. You used to be able to buy them dry and you'd fill them with your own KOH solution. They were not sealed (in today's terminology), and not what you'd call high capacity.
From memory, around 1.2V, but try a web search. Not sure whether you'd even be able to buy these now.
I bought one from a disposals store in the 70s. http://thumbnails112.imagebam.com/37333/0363e9373324851.jpg
Panasonic engineers report in paper that their Li (Ni,Co,Al)O2 based batteries suffer less than 10% loss after 3000 cycles. Cycle life is dependent on a couple of other factors. High temperature operation shortens life. So does rapid discharge, e.g. in an electric vehicle keeping the "pedal down" as a habit.radaballer said:Lithium ion batteries infamously degrade over time. 1000 charges can cause up to 20% loss in capacity. Is there a type of rechargeable battery that will not degrade over time?