This is a cathode made from nanoscale particles of crystalline copper hexacyanoferrate which has a lattice that nicely fits hydrated potassium ions. Very high charge and discharge rates. 40000 cycles and still 80% capacity. Projected to be cheap to mass produce.
The battery chemistry is cheaper than lithium ion, but also heavier for the same energy storage. Sounds like more than a few times heavier, but hard to tell from the article. In any event, aimed at grid storage, energy density isn't as important as for portable electronics.
The fly in the ointment is that they do not have a suitable anode terminal, but as researchers that just gives them something to work on.
Comments
This is a cathode made from nanoscale particles of crystalline copper hexacyanoferrate which has a lattice that nicely fits hydrated potassium ions. Very high charge and discharge rates. 40000 cycles and still 80% capacity. Projected to be cheap to mass produce.
The battery chemistry is cheaper than lithium ion, but also heavier for the same energy storage. Sounds like more than a few times heavier, but hard to tell from the article. In any event, aimed at grid storage, energy density isn't as important as for portable electronics.
The fly in the ointment is that they do not have a suitable anode terminal, but as researchers that just gives them something to work on.