It is of strong interest in fuel cells fabrication to have a good control of raw materials properties and microstructure. An adequate synthesis method is, for instance, necessary to obtain high performance electrodes with enhanced conduction and gas exchange properties. Here, we present a new method in which cations dissolved in an aqueous solution are trapped inside a 3D chelating gel before fast drying. We prepared nanocrystalline powders of a wide panel of the state-of-the-art fuel cells materials such as: YSZ, CGO, Ba_0.5Sr_0.5Co_0.8Fe_0.2O_4-d, GdBaCo₂O_5+x, Nd_1.9NiO_4+d, La_0.75Sr_0.25Cr_0.5Mn_0.5O₃, and BaZr_0.9Y_0.1O₃. This very fast route allows preparing several tens of grams of nanometric powders in one batch and the feasibility of the process is almost independent from the cations involved in the reaction. The synthesized powders present nanometric crystal size (10–40 nm), narrow size distribution and the possibility of aggregate disagglomeration via soft ball milling, allowing better electrolyte consolidation or control of electrode morphology in fuel cells. We also made this method more attractive from the industrial point of view, by using a non toxic polymer and a non-explosive initiator. Finally, since the process is largely independent from the material formula, this method can be easily extended to other kinds of oxides such as ferroelectrics, CMR compounds or gas sensors…

1. A. Sin, P. Odier, Advanced Materials, 12 (2000) 649-652

2. A. Tarancón, G. Dezanneau, J. Arbiol, F. Peiró, J.R. Morante, J. Power Sources 118 (2003) 256-264

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/11245 must be provided.

1. Co-sputtered dielectrics for transparent electronics
2. Nanostructured metal oxides synthesized by hard template method for gas sensing applications
3. Nanostructural HRTEM, HREELS and HAADF characterization of the La2Mo2O9 ion conductor
4. TPD analysis of the CO2 detection mechanisms using LaOCl sensing material
5. Simulation of the influence of particle size distribution and grain boundary resistance on the spectral response of 2D polycrystals.
6. Transition metals (Co, Cu) as additives on hydrothermally treated TiO₂ for gas sensing
7. Structural and electrical characterisation of MOS gas sensors made on SiC substrates