Hi,
What limits power density of a source (eg: battery, supercapacitor)?
My line of thinking took me to a simple case of a source V, with no internal resistance, and a load R. Now, power to load is V²/R. Thus, smaller the R, higher the power delivered. As R --> 0, P --> infinity.
Then, I modified the case to include the internal resistance of the source (see pic attachment).
I found that the total power from the source and the total power to the load had limits which depend on the value of the internal resistance.
So, am I correct in saying that the internal resistance limits the power density of a source?
Are there any other reasons for the limits on power densities of supercapacitors, capacitors, batteries?
Thanks