YSZ electrolyte support with novel symmetric structure by phase inversion process for solid oxide fuel cells

Atmospheric plasma spraying was employed to prepare anode, cathode, and Y2O3-stabilized ZrO2 (YSZ) electrolyte to aim at reducing manufacturing cost. YSZ electrolytes were deposited on the anode at different deposition temperatures of 200 °C, 400 °C and 600 °C to optimize the gas tightness of plasma-sprayed YSZ electrolyte. The influences of the deposition temperature on the microstructure and gas-tightness of plasma-sprayed YSZ electrolyte were investigated. The effect of microstructure and the gas-tightness of YSZ electrolyte on the open circuit voltage and the output performance of solid oxide fuel cells (SOFCs) were examined. The results showed with the increase of deposition temperature, the porosity of YSZ electrolytes almost decreased by about 80% and the microstructure of YSZ electrolytes changed from the typical lamellar structure to the continuous columnar crystal structure. At a deposition temperature of 600 °C the gas permeability decreased to 1.5 × 10−7 cm4gf−1s−1, and the highest open circuit voltage can reach 1.026 V, indicating the applicability of the as-sprayed YSZ directly to the SOFC electrolyte.

Download Full-text

Impedance analysis of thin YSZ electrolyte for low-temperature solid oxide fuel cells

Ionics ◽

10.1007/s11581-019-02935-4 ◽

2019 ◽

Vol 25 (8) ◽

pp. 3537-3548 ◽

Cited By ~ 1

Author(s):

Gianfranco DiGiuseppe ◽

David Thompson ◽

Cenk Gumeci ◽

A. Mohammed Hussain ◽

Nilesh Dale

Keyword(s):

Fuel Cells ◽

Low Temperature ◽

Solid Oxide Fuel Cells ◽

Impedance Analysis ◽

Solid Oxide ◽

Oxide Fuel ◽

Ysz Electrolyte

Download Full-text

Deposition of a Thin-Film CGO Electrolyte for Solid Oxide Fuel Cells

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.685.776 ◽

2016 ◽

Vol 685 ◽

pp. 776-780

Author(s):

Andrey A. Solovyev ◽

Anastasya N. Kovalchuk ◽

Igor V. Ionov ◽

S.V. Rabotkin ◽

Anna V. Shipilova ◽

...

Keyword(s):

Fuel Cells ◽

Fuel Cell ◽

Magnetron Sputtering ◽

Solid Oxide Fuel Cells ◽

Operating Temperature ◽

Solid Oxide ◽

Oxide Fuel ◽

Current Voltage ◽

Current Voltage Characteristics ◽

Ysz Electrolyte

Reducing the operating temperature of solid oxide fuel cells (SOFCs) from 800-1000°C is one of the main SOFC research goals. It can be achieved by lowering the thickness of an electrolyte (ZrO2:Y2O3 (YSZ) is widely used as electrolyte material). On the other hand the problem can be solved by using of another electrolyte material with high ionic conductivity at intermediate temperatures. Therefore the present study deals with magnetron sputtering of ceria gadolinium oxide (CGO), which has a higher conductivity compared to YSZ. The microstructure of CGO layers deposited on porous NiO/YSZ substrates by reactive magnetron sputtering of Ce:Gd cathode is investigated. Current voltage characteristics (CVC) of a fuel cell with NiO/YSZ anode, CGO electrolyte and LSCF/CGO cathode were obtained. It was shown that the power density of a fuel cell with CGO electrolyte weakly depends on the operating temperature in the range of 650-750°C in contradistinction to YSZ electrolyte, and is about 600-650 mW/cm2.

Download Full-text