Year: 2024
Type: article
Abstract: Achieving reversible O‐redox through the formation of electron–holes on O could hold the key to a new generation of high energy density Na‐ion cathodes. However, to date, it has only been demonstrated in a small handful of cathode materials and none of these materials exploit the dual benefit of high voltage transition metal redox and O‐redox, instead relying on Mn3+/4+ capacity close to 2 V vs Na+/Na. Here, a new Na‐ion cathode exhibiting electron–holes on O is demonstrated, P2‐type Na0.67Li0.1Ni0.3Mn0.6O2, which also utilizes the high voltage Ni3+/4+ redox couple to deliver the highest reported energy density among this class of compound. By employing a low Li content and avoiding honeycomb ordering within the transition metal layer, it is possible to stabilize the hole states, and the high voltage plateau is preserved in Na0.67Li0.1Ni0.3Mn0.6O2 over cycling.
Source: Advanced Energy Materials
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,510
Awards: G160408179, G2158237762, G2703599441, Sir Henry Royce Institute - Oxford Equipment, G3419627539, G3853548594, G5019177369, G504327055, G6148779978, G6762263894, The Royce: Capitalising on the investment, G708391930, G7445816383, G8038628577, Sir Henry Royce InsStitute - recurrent grant, SUPERGEN Energy Storage Hub, G8429489860
OpenAlex ID: W4401027329