Chemical capacitance measurements reveal the impact of oxygen vacancies on the charge curve of LiNi_0.5Mn_1.5O_4−δ thin films

Abstract

The level of oxygen deficiency δ in high-voltage spinels of the composition LiNi0.5Mn1.5O4-δ (LNMO) significantly influences the thermodynamic and kinetic properties of the material, ultimately affecting the cell performance of...

Transmission line revisited – the impedance of mixed ionic and electronic conductors

“…the Li content. 5–7 Analogously, the transport properties of SOFC and SOEC materials vary with the oxygen content. 8 The second reason for the large variety of MIEC impedance spectra is found in the boundary conditions for ionic and electronic transport at the contact interfaces, which necessarily contribute to the measured impedance spectra.…”