Strontium- iron- cobalt metal oxide crystal that releases and captures oxygen on demand could improve solid oxide hydrogen fuel cells

https://newatlas.com/materials/breathing-crystals-oxygen-fuel-cells/ 

"durable, efficient electricity production... heated to relatively low temperature of about 752°F (previously much higher temperatures, for oxygen control)... replaces other materials that were too fragile to use repeatedly... smart materials that can adjust in real time... clean energy, electronics, even eco-friendly building materials... in addition to fuel cells, can be used in: thermal transistors that control heat transfer in electronics, smart windows for adjusting heat flow as needed to maintain indoor temperatures"