Na-ion diffusion mechanism in the cathode material NaxFe0.5Mn0.5O2
P2-NaxFe1/2Mn1/2O2 has been identified as a potential cathode material for Na-ion batteries since it has comparable electrochemical performance to commercially available Li-ion cathodes and it is composed entirely of abundant elements. For x = 2/3 it has the P2-NaxCoO2 structure, however, the absence of superstructures is expected to lead to a different diffusion mechanism and better electrochemical performance. We aim to study the diffusion mechanism in a large powder sample of P2-NaxFe1/2Mn1/2O2 using quasi-elastic neutron scattering. Our previous measurements with unpolarised neutrons at ISIS indicate the presence of incoherent, magnetic and nuclear scattering. We now propose to use XYZ polarisation analysis on ThHALES to isolate the spin-incoherent scattering, for comparison with Chudley-Elliott models of jump diffusion and molecular dynamics simulations.
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GOFF Jonathan P.; ARSLAN Sercan; REFSON Keith; S.Uthayakumar; STEFFENS Paul and VONESHEN David. (2019). Na-ion diffusion mechanism in the cathode material NaxFe0.5Mn0.5O2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-03-174
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