Diffusion properties of oxide materials

In this study, a layered O3-type Ni-rich cathode material for sodium-ion batteries was synthesized through co-precipitation followed by a solid-state reaction at 650 oC in dry air. The electrochemical properties of the Ni-rich material were evaluated. Charge/discharge performance demonstrated that the material delivered higher capacity compared to other layered oxides.

6p vikwong 29-09-2024 2 1   Download

Purpose: The purpose of thesis is to study the influence of temperature, pressure and dopant on the diffusion coefficient and ionic conductivity of the bulk material as CeO2, c-ZrO2, YDC and YSZ. For YDC and YSZ thin films, we find the thickness dependence of the lattice constant, diffusion coefficient and ionic conductivity

28p tunelove 10-06-2021 11 2   Download

The oxide reduction diffusion (ORD) procedure has recently been applied in synthesizing hydrogen storage materials AB5 for Ni-MH batteries. Starting from metal hydroxides and La oxalat precursor, superfine powder alloys LaNi5, LaNi4.5Co0.5 and LaNi3.87Mn1.13 were obtained by this “soft-chemistry” route. Chemical composition, structure and morphology of alloy phases were examined by different analysis techniques such as AAS, EPMA, X-ray and TEM. The H2-absorption and desorption behavior of crystalline products was determined by Sieverts’ method.

9p uocvong01 24-09-2015 37 3   Download