RE:Battery density I can only advise you to delve deeper into the matter and also and above all to follow European, German technical institutes. In all probability, this battery will be used for airplanes and probably also for trucks; as also announced by CATL. There is a correspondingly large amount of space for such batteries. It is assumed that silicon in the anode and a mix of NCM in the cathode lead to this energy density. It probably won't work without cobalt. I can recommend the following youtube channel to you. Prof. Fichtner Ulm Battery Research Institute is an absolute authority in this field. Unfortunately this channel is in German. I don't know if you can do anything with it. But what Prof. Fichtner also clearly advocates is that cobalt will still be needed for a very long time. So all good :)
https://www.youtube.com/watch?v=GYCGLsajyuE