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Grid-Scale Bubble Batteries Will Soon Be Everywhere
(spectrum.ieee.org)
This is a most excellent place for technology news and articles.
This concept was started 3-5 years ago, when retail batteries where $500/kwh. They are now under $100/kwh. Concept is worthwhile for diversification of resources and talent.
There's not enough minable copper or lithium to make all of the batteries we will need. So e alternatives will have to emerge if we are to reduce the need for generating power on demand with fuels.