I have worked on this idea, but in a very low tech version, my road block is how to get sulphate powder and lead oxide materials back into solution and pure lead. I have little knowledge in chemistry and have not found anything that helps me in this area.
Simple materials involve PVC heavy wall water pipe 8" or larger in diameter, pure lead bird shot and sulfuric acid, anode and cathode are sections filled in some thickness, separated with porous non conductive material. End plates of thick lead serve as seals and contact points. Voltage and capacity will dictate how long the pipe should be (and a few other things).
A charge to condition the pellet media, then when sulphate buildup becomes excessive, a turning of the pipe shell will give a ball mill action which cleans and brings the media to a better condition.
If a method of separation and reconditioning the materials removed in the cleaning process can be used, this becomes a way to have a somewhat inexpensive storage system, that continually recycles.
The automated mechanics of recycling the lead and acid is simple, if heat and electric charge can accomplish the task.
Sorry if this is not what people want to hear, my thoughts are based on less density (or maybe not) and a battery that continually cleans and replenishes it's self. To most it might be a pipe dream (pun intended) but to me, lifespan is more important than capacity and then price is just about rock bottom.
Now add a 24/7 almost free charge system and life of electric power will have a whole new meaning to boating.
Everyone can set back and save for the exotic, high price stuff, or those with more book smarts than me, might think and read between the lines and put to action what I will likely never get too.
Ron
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