Two varying approaches to battery development may hold clues to future directions for energy storage. At the same time, their announcements, promising as they seem, reinforce our cautious attitudes toward how battery performance numbers are presented. PNNL Attacks the Electrolyte Issue According to Green Optimistic, “Researchers from the Pacific Northwest National Laboratory (PNNL) have developed a new formula for battery’s electrolyte solution to enhance its performance unprecedentedly in terms of its service life and storage capacity or an electric vehicle’s range.” The video gives an overview of what it takes to make a battery and hints at the reasons battery research takes so long to give up improved energy storage devices. Unprecedented the development may be, and the promise of a battery with a 7X longer lifespan and two-to-three times longer range than currently-available batteries certainly captures our attention. Its own press release suggests that PNNL researchers are enthusiastic about the longevity of their new chemistry. “When it comes to …
A Dendrite Eraser?
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 …