J.-C. Grenier

TL;DR: In this article, the oxygen reduction at the surface of Nd2NiO4+δ mixed conducting cathodes has been studied in the temperature range 400-1100 K using two kinds of cells: (i) porous cathodes deposited on a standard electrolyte pellet of yttria-stabilized zirconia (YSZ) and (ii) YSZ films sputtered on dense pellets of nd2 NiO4 + δ, and the performances of these cathode materials were measured using the complex impedance spectroscopy at various temperatures

TL;DR: In this paper, a novel preparation method of this phase has been investigated using electrochemical oxidation of the SrFeO 2.50 brownmillerite, which has been characterized by powder X-ray diffraction, chemical analyses and 57 Fe Mossbauer spectroscopy.

TL;DR: In this article, the authors show that the relaxation of the structure as a function of δ could arise either from a steric effect or from a disproportionation of Ni 2+ into Ni + and Ni 3+.

TL;DR: Two terms of the SrFeO 3− y solid solution (y = 0.17; 0.25) have been investigated by Mossbauer spectroscopy at high temperature under controlled atmosphere.

TL;DR: In this paper, the authors measured the chemical oxygen diffusion coefficient (D ) by conductivity relaxation experiments on La2Cu0.5Ni0.4+δ ceramics.