Identification and characterisation of high energy density P2-type Na2/3[Ni1/3−y/2Mn2/3−y/2Fey]O2 compounds for Na-ion batteries12. Issue 13 (26th February 2018)

• Record Type: Journal Article
• 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.
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 13(2018)
• Page Start: 5271
• Page End: 5275
• Publication Date: 2018-02-26
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta09607k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The Na x [Ni( x − y )/2 Mn(2− x − y )/2 Fe y ]O2 composition space was explored, and two compositions were identified as P2 compounds that can deliver high energy densities. Abstract : The composition space between MnO2, NaFeO2, and Na[Ni1/2 Mn1/2 ]O2 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-Na2/3 [Ni1/3− y /2 Mn2/3− y /2 Fe y ]O2 ( 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.