Stanford scientists develop high-efficiency zinc-air battery

Dean Sigler Electric Powerplants, Sustainable Aviation 0 Comments

Battery researchers, including those at Stanford University, have been focusing for years on improving lithium batteries of multiple chemistries.  While IBM tries to create the 500-mile battery based on lithium-air reactions, and ReVolt in Portland works on perfecting a long-lasting zinc-air cell, Stanford researcher Hongjie Dai and his team claim to have “developed an advanced zinc-air battery with higher catalytic activity and durability than similar batteries made with costly platinum and iridium catalysts.” The resulting battery, detailed in the May 7 online edition of the journal Nature Communications, could be the forerunner of something with greater endurance and lower cost than current efforts. Mark Schwartz, writing for Stanford, quotes Dai, a professor of chemistry at the University and lead author of …

Thomas Alva Would Be Proud

Dean Sigler Electric Powerplants, Sustainable Aviation 0 Comments

The best batteries as now produced use expensive materials and processes to achieve high energy density.  Could a century-old idea be resurrected to provide an inexpensive alternative to today’s costly electric storage devices?   Science Daily reports on a recent attempt to improve on a proven technology. Stanford University’s Hongjie Dai, professor of chemistry and head of a research group, is working with the Edison battery, named for Thomas Alva Edison, and using the nickel-iron electrodes Edison favored, but with a modern twist to overcome one of its disadvantages. Stanford’s news bulletin quotes Dai.  “The Edison battery is very durable, but it has a number of drawbacks. A typical battery can take hours to charge, and the rate of discharge …