ive tried it all @broli.carbon rods from zinc-carbon batteries are actualy compressed activated carbon and they must be dewaxed,cleaned etc before use in karpen systems.for oxygen systems they give a good demonstration of a concentration cell coupled with e.g. silver cathodes in alkaline media but they tend to cling on to gases thus they arent really practical in this instance.they may,however,be highly practical for non-gasesous systems.

Well yeah I assumed we were talking about a liquid system. Activated carbon comes in many different types, they can also be impregnated with different substances including silver. So a regular and impregnated electrode could be used for instance in such system.

yes @broli.but it is better to use just plain silver with a highly blackened surface(electrolyticly anodized silver,sponge silver) seperate from the carbon otherwise you will have a cell within a cell,oxygen spillover from the silver to the carbon within the cathode itself. 

@sarkeizen its just the electrochemical variant of the following process.thats all it is.nothing more nothing less..totaly reversable.

Quote from: profitis on November 15, 2013, 01:43:41 PM
@sarkeizen its just the electrochemical variant of the following process.thats all it is.nothing more nothing less..totaly reversable.

Which is not a formal logical argument, which of course makes my point.  If the books were so clear, then you could create a series of steps each of which is forced by the prior one which brings us to the conclusion that you can build a battery which will run an ipod like device forever.

Your desire to imagine that some thing is just like some other thing is, of course irrelevant.