Very recently Chemical Sciences published results of the discovery of a new cobalt compound that can absorb oxygen at presumably a higher capacity than what has been achievable before. The paper is here. I don't have access to the full publication, and since I'm not a chemist I don't really follow the abstract too well. But from the popular news there are claims that 10 liters of the compound can absorb "a whole room of oxygen". Not very quantitative.
So my main question - is this really a breakthrough in terms of absorption capacity? And to what degree?
Also - how can the absorption/release of oxygen be controlled?
Edit: I found a link to the full article here.