The development of new cathode materials for the use in molten carbonate fuel cells
Several techniques for the characterisation of ceramic oxide MCFC cathode materials were investigated. It was concluded that, at present, the cyclic voltammetry method cannot be used as a standard technique to determine the dissolution of materials into the carbonate melt. Two different ac methods were developed for measuring the specific electrical conduction of ceramic oxide materials: two-probe impedance spectroscopy and the four-probe ac technique. Synthesis techniques were developed to obtain well-defined, highly pure compounds for materials research. A sol-gel technique was realised which enables the synthesis of powders consisting of spherical LiFeO(2) particles. This technique has the potential to control particle size and shape. Extensive investigations were carried out on LiFeO(2). The influence of cation-stoichiometry and doping with M(2+) elements on the electrical conductivity was observed. The specific electrical conductivity of this material can be improved to a sufficient level by doping. Results of preliminary laboratory cell testing are consistent with those of the morphological stability of LiFeO(2) cathode structures.
Bibliographic Reference: EUR 13208 EN (1991) 51 pp., MF, ECU 4, blow-up copy ECU 7.50
Record Number: 199110192 / Last updated on: 1994-12-02
Original language: en
Available languages: en