I would be curious to hear more about how these scientists, or other teams, might improve the energy efficiency of this nickel-iron battery. I found the refere

I would be curious to hear more about how these scientists, or other teams, might improve the energy efficiency of this nickel-iron battery. I found the reference links on the wikipedia page for Nickel-iron batteries are yielding interesting information for a first look. https://en.wikipedia.org/wiki/Nickel%E2%80%93iron_battery https://en.wikipedia.org/wiki/Nickel%E2%80%93iron_battery For example the article below, where the use of graphene and carbon nanotubes is described as improving the speed of charge and discharge by several orders of magnitude (though graphene production is still an area of research rather than a mature industrial process from what I understand). https://news.stanford.edu/pr/2012/pr-ultrafast-edison-battery-062612.html https://news.stanford.edu/pr/2012/pr-ultrafast-edison-batter... A simple search also yielded this patent, assigned to the US department of energy in 2016, but I am not sure how relevant it is. https://patents.google.com/patent/US20150086884A1/en https://patents.google.com/patent/US20150086884A1/en