Layered Oxide Cathodes News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Solid-state batteries offer a lot of benefits over their liquid brethren, with some major drawbacks, but one of those drawbacks may have been circumvented.

Layered transition metal oxide (NaxTMO2), being one of the most promising cathode candidates for sodium-ion batteries (SIBs), have attracted intensive interest because of their nontoxicity, high theoretical capacities, and easy manufacturability. However, their physical and electrochemical properties of water sensitivity, sluggish Na+ transport kinetics, and irreversible multiple-phase translations hinder the practical application. Here, a concept of surface lattice-matched engineering is proposed based on in situ spinel interfacial reconstruction to design a spinel coating P2/P3 heterostructu...

The key to breaking through the capacity limitation imposed by intercalation chemistry lies in the ability to harness more active sites that can reversibly accommodate more ions (e.g., Li+) and electrons within a finite space. However, excessive Li-ion insertion into the Li layer of layered cathodes results in fast performance decay due to the huge lattice change and irreversible phase transformation. In this study, an ultrahigh reversible capacity is demonstrated by a layered oxide cathode purely based on manganese. Through a wealth of characterizations, it is clarified that the presence of l...