Making batteries smaller, lighter, and more powerful is an ongoing trend, supposedly climbing at eight percent per year in terms of energy density (energy stored per unit of weight). Even this blog is guilty of sometimes unrequited enthusiasm for some new developments that appear to be an “answer” for aircraft use. Getting a battery that double or quintuples energy density would be ideal for aircraft, but seems to be a labor worthy of Sisyphus (you could look it up). As constantly noted here, batteries have three major components, the anode, or negative electrode; the cathode, or positive electrode; and the electrolyte, usually a liquid that allows the flow of ions between electrodes. That electrolyte is subject to overheating and on rare occasions, bursting into flames. That has led researchers at MIT, Samsung, and in California and Maryland to develop a solid-state electrolyte that might overcome the safety issue while providing more energy storage in a given space. Yan Wang, an …