@sonhouse saidI found this more direct link to this study that says at the moment its only 9 to15 K BUT this is early days of the research and now of course they are hoping they can modify it to increase that a lot.
@humy
Any mention of the transition temperature? I assume it is close to zero but not sure. It could be 30 or 40 K.
https://phys.org/news/2019-08-superconductivity-nickel-oxide-material.html