Simple Chemical Trick To Boost Battery Efficiency

space_mongoose writes "Hitachi thinks that a simple chemical additive could significantly improve battery life. Alkaline batteries have a positive electrode of manganese oxide and a negative electrode of finely powdered zinc, but zinc oxide forms around these grains of zinc. Hitachi's solution is to replace the zinc with a fine powder of zinc-aluminum alloy, displacing the zinc within the zinc oxide layer making it a much better conductor."

Comments

Costs?

[bigberk]

I didn't see any mention of cost in the article. For instance looking at market aluminum prices, I am astounded to see that the price of the raw metal is increasing something like +23% per year. I don't know if relatively speaking the aluminum/zinc oxide is more costly than just zinc, but I think a greater point is... if the raw material costs are increasing at such a rapid pace (over 20% per year!) then just how "cost effective" will these batteries be in the long term?

P.S. the skyrocketing metal costs, including important ones like copper and silver, are part of an ongoing commodity boom and response to out of control inflation in the USA and depreciating US dollar. The rapidly increasing costs of these metals will be reflected in goods we buy, like batteries.

Re:Voltage.

[inviolet]

My baby monitor uses AAs, and I *can* put nicads or nimhs in, but they go dead just from self-discharge as fast as they do from use, so I stick to cheap Kirkland alkalines.

The new Sanyo Eneloop NiMH batteries don't have that problem.

I recently $wapped out my vast collection of piss-poor Energizer (2500 mAH) AAs for Eneloop (2000 mAH) AAs, and there's no going back!