Identification and characterisation of high energy density P2-type Na2/3[Ni1/3−y/2Mn2/3−y/2Fey]O2 compounds for Na-ion batteries.

Authors :: Somerville, J. W.
House, R. A.
Tapia-Ruiz, N.
Sobkowiak, A.
Ramos, S.
Chadwick, A. V.
Roberts, M. R.
Maitra, U.
Bruce, P. G.
Source :: Journal of Materials Chemistry A; 4/7/2018, Vol. 6 Issue 13, p5271-5275, 5p
Publication Year :: 2018
Abstract: The composition space between MnO<subscript>2</subscript>, NaFeO<subscript>2</subscript>, and Na[Ni<subscript>1/2</subscript>Mn<subscript>1/2</subscript>]O<subscript>2</subscript> has been explored with the goal of identifying Earth-abundant single-phase P2 cathode materials. This has led to the identification of two compounds, P2-Na<subscript>2/3</subscript>[Ni<subscript>1/3−y/2</subscript>Mn<subscript>2/3−y/2</subscript>Fe<subscript>y</subscript>]O<subscript>2</subscript> (y = 1/6, 1/3) which exhibit state of the art specific energies. These materials were further evaluated through galvanostatic cycling and X-ray absorption spectroscopy. [ABSTRACT FROM AUTHOR]

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