power electronics notes

Bill Schweber | May 01, 2018 https://www.toppersnotes.com/ies-gate-samples/

There’s nothing new about use of zinc in battery cells; it was first employed in 1799. However, lithium-based cells have become the preferred choice due to their favorable energy density with respect to both mass and volume—as well as their excellent recharge capability—despite the well-known safety issues associated with lithium chemistries. Zinc batteries are still used in applications which do not demand the highest energy-density performance, where rechargeability is not crucial, or where safety is a major issue.

To overcome these limitations, a joint team from the U.S. Army Research Laboratory (ARL), Adelphi, Md.; the University of Maryland (UMD), College Park, Md.; and the National Institute of Standards and Technology (NIST) Center for Neutron Research, Gaithersburg, Md. focused on improving the basic performance of zinc chemistry—especially in the recharge cycle. They have devised and tested a new class of water-based electrolytes, with results published in Nature (“Highly reversible zinc metal anode for aqueous batteries”) along with detailed supplementary information. Their aqueous (water-based) zinc-battery solution has relatively high capacity, is rechargeable, and is intrinsically safe. info here power electronics notes