A Dendrite Eraser?

Dean Sigler Electric Powerplants, Sustainable Aviation Leave a Comment

The Pacific Northwest National Laboratory in Richland, Washington, seems to have an industrious group of researchers who come up with ever-improved forms of batteries.  One of their creations, a hybrid graphite/lithium anode, was featured in this blog last year. Now, Frances White reports from the PNNL that one of the researchers involved with that work has led another team to an innovative approach to a new electrolyte for lithium batteries.  According to Ms. White, “PNNL physicist Jason Zhang (Ji-Guang “Jason” Zhang) and his colleagues have developed a new electrolyte that allows lithium-sulfur, lithium-metal and lithium-air batteries to operate at 99 percent efficiency, while having a high current density and without growing dendrites that short-circuit rechargeable batteries.” This is a real breakthrough because, for lithium batteries overall, the chemistries that give higher performance are generally more volatile.  This new material avoids those issues and gives top performance with great safety. Earlier electrolytes reacted with the lithium electrode to grow little spikes that …