Manufacturing of Electrolyte and Cathode Layers SOFC Using Atmospheric Spraying Method and Its Characterization

S Sulistyo,S Ariffin,S Mahzan

doi:10.12777/ijse.4.1.30-33

Abstract

The use of Solid Oxide Fuel Cell (SOFC) has created various interest in many parties, due to its capability to convert gases into electricity. The main requirement of SOFC cell components is to be produced as thin as possible to minimize the losses of electrical resistance, as well as able to support internal and external loads. This paper discusses the procedure of making a thin electrolyte layer, as well as a porous thin layer cathode using atmospheric spraying technique. The procedure of spraying was in room temperature with the process of sintering at temperature of 1350 0 C held for 3 hours. The SOFC characterization of electrolyte and cathode microstructure was determined by using the SEM, FESEM, XRD and impedance spectroscopy, to measure the impedance of SOFC cells. The results show that the thickness of thin layer electrolyte and porous cathode obtained of about 20 µm and 4 µm, respectively. Also the SOFC cell impedance was measured of 2.3726 x 10 6 Ω at room temperature. The finding also demonstrated that although the materials (anode, cathode and electrolyte) possess different coefficient thermal expansion, there was no evidence of flaking layers which seen the materials remain intact. Thus, the atmospheric spraying method can offer an alternative method to manufacturing of SOFC thin layer electrolyte and cathode. [ Key words: SOFC; spraying method; electrolyte; cathode ]

Highlights

Solid Oxide Fuel Cell (SOFC) is an electrochemical device that converts the gas into electricity and waste products in the form of steam and heat if using hydrogen gas and operate between temperature 600 – 10000 C. [1-3] The SOFC components consist of an anode, an electrolyte and a cathode
The results shows that the compounds formed were Lanthanum Strontium Manganese Oxide - La0.8Sr0.2MnO3, Lanthanum Strontium Manganese Oxide Sr0.1MnLa0.9O3 and Tazheranite, syn - ZrO2, Lanthanum Oxide - LaO
From the above discussion, it can be concluded as follows: 1. The quality of spraying process is strongly influenced by the viscosity of the solution, the substrate distance, hole sizes and spraying pressure

Summary

INTRODUCTION

Solid Oxide Fuel Cell (SOFC) is an electrochemical device that converts the gas into electricity and waste products in the form of steam and heat if using hydrogen gas and operate between temperature 600 – 10000 C. [1-3] The SOFC components consist of an anode, an electrolyte and a cathode. [1-3] The SOFC components consist of an anode, an electrolyte and a cathode. One of the main requirements of SOFC cell components is be produced as thin as possible to minimize the losses of electrical resistance and able to support internal and external loads.[3]. Several methods have been developed to produce a thin layer of electrolyte and porous cathode. These methods are grouped into chemical, physical and ceramic powders methods.[5, 6]. The plasma spraying technique is capable to produce the electrolyte and cathode with the respective thickness of 70 and 100 microns. The main principle of spraying technique is by controlling the atomization of slurry or fluid and the droplets flow directed onto surface of the product. The cross sectional of the sprayed disk is affected by the air pressure, rheology of the slurry, design of nozzle and surrounding spreader, and working distance from the nozzle. 8, 9] The coating thickness on the substrate can be controlled by setting the cross-sectional of the spraying disk and this activity can be repeatedly done until the level of a certain thickness is achieved.[3, 5]

MATERIALS AND METHODS

RESULT

LSM powder

CONCLUSION