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23.06.2014
Researchers at Stanford University are working on a new rechargeable zinc-air battery that could provide a low cost energy storage alternative to the current favorite, lithium-ion. Before we dig into the Stanford zinc-air battery, let’s be clear that lithium-ion batteries are not going away any time soon. There should be some improvement in the near term, with the recent discovery of a huge lithium deposit in Wyoming and a coordinated effort by the Obama Administration to boost domestic lithium production. Problems with the technology include the aforementioned sluggishness of conventional catalysts used in zinc-air batteries, as well as the durability of the zinc electrodes. To resolve those issues, the Stanford team came up with a new line of low-cost catalysts, including a nanocrystal-carbon nanotube combination as well as metal oxides sourced from non-precious materials. Dai foresees some additional obstacles in the Stanford team’s path to commercializing the technology, but in the mean time zinc-air batteries are already marching into the market. One company we’ve been following here at CleanTechnica is Eos Energy Storage, which has been working to resolve the zinc-air durability issue. According to Bloomberg reporter Andrew Herndon, the test will take place next year under a $250,000 matching grant from the New York State Research and Development Authority. Keep up to date with all the hottest cleantech news by subscribing to our (free) cleantech newsletter, or keep an eye on sector-specific news by getting our (also free) solar energy newsletter, electric vehicle newsletter, or wind energy newsletter. Tina Casey specializes in military and corporate sustainability, advanced technology, emerging materials, biofuels, and water and wastewater issues.
Please stop promoting the idea the supply of lithium is or ever will be an issue for lithium batteries. Research how much the cost of cobalt contributes to the cost of some lithium battery chemistries if you really want something to worry about!
Ironically cobalt is one of the materials they are using in this new battery so that may have a significant impact on cost though presumably the price per KWh is still going to be very good.
Want to share some info about what you’re driving now and your other six day driving pattern?
And they, or someone else, used the small quantity price of lithium rather than the bulk cost to calculate that there are hundreds of dollars worth of lithium in a LEAF battery pack. That would mean that in that 20 year period we would need to produce 480,000 metric tons of lithium per year. Argentina, Australia, Bolivia, Brazil, Canada, China, Portugal and Zimbabwe have roughly 13,000,000 metric tons of lithium that can be extracted. Lithium batteries are not the solution, short lifespan, and is not enough lithium in the world to go around, besides that all that energy that goes into production, this battery produces more greenhouse gas in the environment in a lifetime then of a coal fired power stations, just like grid solar power does. Now, granted there are all sorts of other costs… but are any of those material costs? Smyth added the mystery batteries will cost much less than batteries in today’s electric cars and they’ll have a “big impact” on the auto industry and “it completely changes the equation” on cost, range, and vehicle packaging.
Should be able to make a 200 mile range EV for about the same price as a LEAF and economy of scale would pull it down into the low $20k range.


One never knows whether things are going well or failure is underway until a product appears.
Imagine a future in which your remote-controlled toy helicopter can fly for 20 minutes instead of 7.
Oh, and also the trifling matter of fundamentally transforming the American auto market and providing a means to realistically store renewable energy. The electrolyte is an aqueous system containing 35 to 45 percent by weight potassium hydroxide, and the separator has historically been cellophane. Silver-zinc historically hasn?t achieved widespread commercial use due primarily to short cycle life and high cost.
Global battery technology improvement efforts currently focus mainly upon large format batteries for transportation and energy storage with power density, longevity, and cost being the emphasis.  At the opposite end of the size spectrum, relatively little attention has been placed upon miniature batteries for electronics and medical applications.
The cell performance data used in this report for comparing different commercially available battery chemistries were found on the companies? websites. Figures 2 and 3 focus on the smaller sizes that are more comparable to the silver-zinc button cell sizes currently available, up to 600 mm3 and 200 mWh, respectively. From the performance data plotted in the above two figures, it can be seen that the four silver-zinc button cell batteries deliver greater energy density than the equivalently sized rechargeable Li-ion batteries available on the market today. Also, with regard to cycling data for the Li-ion cells published in their specification sheets, they are given with a condition of only being able to maintain above 80 percent of that capacity for a minimum of 200 cycles.  Typically, Li-ion cells only deliver the rated capacity for the first few cycles, and then rapidly fall to between 85 to 90 percent within the first 100 cycles. Epsilor is part of Arotech Corporation’s power sources division which is made up of the Epsilor-Electric Fuel Ltd. Currently, the US depends heavily on imported lithium, creating a significant vulnerability to global market swings.
However, over the long term it’s tough to see how lithium alone could provide a stable platform for the exploding electric vehicle market, among other uses. As the battery discharges it produces zinc oxide, which regenerates into zinc when the battery is recharged. Tina’s articles are reposted frequently on Reuters, Scientific American, and many other sites. It makes up a tiny fraction of the cost of a battery and even if that were not so there are plenty of other sources that are not currently being utilized.
These little incremental and difficult-to-market improvements have been good, and eventually one of them’s going to become a real game changer. It is an obsolete browser and may not display correctly on modern websites, therefore it is recommended that you update it.
Rechargeable silver-zinc batteries have been successfully used for decades in military and aerospace applications where high energy and power density are required.  The electrochemical reaction involves the oxidation of zinc to zinc oxide and the accompanying reduction of silver(II) oxide to metallic silver.
Because rechargeable silver-zinc batteries use an aqueous electrolyte, they may pose a reduced flammability hazard when compared with some Li-ion batteries.
Specific Energy and Energy Density Values for Several Battery Chemistries From Data Reported in Handbook of Batteries, 4th edition, D.


Physical Characteristics for Lithium-ion and Silver-Zinc Battery Electrode Materials Reported in Handbook of Batteries, 4th edition, D. New rechargeable silver-zinc batteries developed by ZPower, however, have addressed the limited cycle life issue through 15 years of R&D and now offer a solution today with cycle life comparable to lithium-ion. The miniature battery segment is where silver-zinc technology offers distinct advantages over every other rechargeable battery technology, even lithium-ion. The reported energy densities from the different battery manufacturers are compared with respect to size in Figure 2 and with respect to discharge energies in Figure 3. In fact, there are no rechargeable Li-ion options at volumes less than 200 mm3, whereas there are two silver-zinc solutions. Furthermore, the capacity of the Li-ion cells generally plateaus between 80 to 85 percent of their advertised rated capacity before the 200th cycle. Solving that problem could greatly expand the market for wind and solar power, including electric vehicle batteries and utility-scale energy storage. And what materials could potentially throw a wrench in the plan with the commercialized tech?
The high cost of silver remains an issue and is one of the reasons for focusing upon small button and coin batteries where precious metal cost isn?t exorbitant.
For the other two silver-zinc button cell sizes, due to the higher intrinsic material and capacity density of the electrode materials, they clearly exhibit greater energy density performance than the similarly sized rechargeable Li-ion batteries.
In comparison, the silver-zinc button cells maintain greater than 98 percent of their advertised rated capacity for over 300 cycles.
It is again clear that AgZn offers a significantly greater capacity density and cycle life performance over current rechargeable Li-ion solutions. Figure 1 shows a comparison of the published literature values for the silver-zinc battery energy density and specific energy with respect to other commercial secondary battery chemistries.
Solar may be making efficiency strides soon also, it may be very soon that power companies will be buying from consumers to supply their big users.
In the figure, it can be seen that silver-zinc batteries have the highest specific energy and energy density ranges when compared to the other rechargeable chemistry solutions available on the market, including Li-ion.
This increased performance stems from the inherently higher material and capacity densities of the electrodes (shown in Table 1).
Slow down your thought process and your typing, don’t buy the mindless hype you hear from media or morons.



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