Michael Ross via EV wrote:
I am comparing to the lead acid chemistry where the charged state has a
competing lower thermodynamic state, so a charge lead acid cell always runs
down even in the absence of any short circuit or load. One of the neat
things about Li ion cells that this condition does not exist. This is the
self discharge that I am talking about.
Well, Dahn says very clearly in his lecture "there is no redox shuttle"
back to the positive electrode.
Lack of any redox reactions doesn't mean there aren't any other sources
of leakage and self-discharge. For example, capacitors have no redox
shuttle, either... and yet they self-discharge.
When you have a voltage difference, you also have an electric field. The
strength of this field is usually measured in volts per meter. When the
oppositely charged particles are very close together (micrometers), even
a small voltage difference (like 3v) creates an enormous electric field
strength (3 million volts per meter). Such a field strength can easily
propel electrons from one side to the other; i.e. discharge the battery.
--
The greatest pleasure in life is to create something that wasn't
there before. -- Roy Spence
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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