Potassium metal battery emerges as a rival to lithium-ion technology

Researchers demonstrate how they can overcome a persistent challenge known as dendrites to create a metal battery that performs nearly as well as a lithium-ion battery, but relies on potassium -- a much more abundant and less expensive element.

from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2020/03/200302153613.htm