[scandum]

> the coulombic efficiency of SSAB-PDBM was 84% at 4 C rate, which gradually decreased to 66% at 101 C rate.

Lithium batteries are over 95% efficient, so a long way indeed. Since the battery contains water, I assume it doesn't work below 0 C.

[tzs]

I don't think 4 C and 101 C are referring to temperature. In battery charging/discharging 1 C is the current you would get if you could discharge a fully charged battery in 1 hour at a constant current.

If a battery's stated capacity is say 2000 mAh then 1 C for that battery is 2000 mA.

Recommended discharge and charge (if applicable) rates are usually specified in terms of C. For example the usual recommendations for charging Panasonic Eneloop batteries is 0.5 - 1 C. So if you are charging an AA which has about 2000 mAh capacity that would be 1000 - 2000 mA, but if you were charging an AAA which has something like 900 mAh capacity that would be 450 - 900 mA.

[elcritch]

It's a solid electrolyte battery, not water electrolyte based.

[pengaru]

There's clearly h2o leaving the oxygen positive electrode in the illustration at the top of TFA

If the h2o ices up on that side, what happens to the battery? or is it not possible?