Stansby Jennifer H, Avdeev Maxim, Brand Helen E A, Gonzalo Elena, Drewett Nicholas E, Ortiz-Vitoriano Nagore, Sharma Neeraj, Rojo Teófilo
School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
Australian Centre for Neutron Scattering, Australia Nuclear Science and Technology Organisation, Kirrawee DC, NSW 2253, Australia.
Dalton Trans. 2021 Feb 7;50(4):1357-1365. doi: 10.1039/d0dt03351k. Epub 2021 Jan 11.
The P2/O3 layered oxide system is thought to benefit from a synergistic enhancement, resulting from the presence of both phases, which makes it a promising cathode material for Na-ion battery applications. Here, biphasic P2/O3-NaLiMnFeO is investigated via a combination of neutron and X-ray scattering techniques. Neutron diffraction data indicates that the O3 alkali metal site is fully occupied by Li. Real time operando X-ray diffraction data shows the structural evolution of the composite electrode - at the charged state there is no evidence of O2, OP4 or Z phases. The results presented herein provide new insight into site preference of Li in biphasic materials and highlights the value of utilizing multiple phases to achieve high performance layered cathode materials for sodium battery applications.
