1. Structural, morphological and thermo gravimetric analysis of
spray pyrolysed Y doped BaCeO3 (BCY) thin films
By
Snehal U. Dubal
Under the guidance
Prof. C. H. Bhosale & Dr. L. D. Jadhav
Department of Physics, Shivaji University, Kolhapur
- 416 004, India

2. Outline of Presentation
1. INTRODUCTION
2. EXPERIMENTAL
 BCY – perovskite structure
 Synthesis of Yttrium doped Barium Cerate (BCY) thin films by
Spray pyrolysis technique
3. RESULTS AND DICUSSION
 Thermo gravimetric analysis
 XRD studies
 Morphological studies
 DC- Conductivity
• 4. CONCLUSIONS

3. Introduction of fuel cell and types of fuel Cell
Fuel cell type
Polymer
electrolyte
membrane fuel
cell (PEMFC)
Mobile Ion
H+
Operating
Temperature ◦C
50-100
Alkaline fuel
cell (AFC)
A fuel cell is an electrochemical energy
conversion device.
At Anode H2 → 2H+ + 2e−
At Cathode 1/2O2 +2e−  1/2 O2−
OH-
50-200
Phosphoric acid
fuel cell (PAFC)
H+
~220
CO32-
~650
O2- OR H+
500-1000
Molten
carbonate fuel
cell (MCFC)
Solid oxide fuel
cell (SOFC)

4. Advantages of SOFC
 Higher efficiency.
 Low cost electrode materials can be used instead of
expensive noble metals such as platinum.
 A large variety of fuels can be used including natural
gas, biogas, methanol and ammonia.
 Low degradation problem of cell components.
 Easy to handle as all the components are in solid
form.

5. Chemicals and materials
BCY –perovskite structure
•
The different perovskite based materials have
been
explored
electrolyte
as
materials
proton
for
conducting
intermediate
temperature SOFCs .
•
Three basic materials are BaZrO3, SrZrO3
and BaCeO3.
•
10-2 to 7 x 10-2
Oxygen atom
Barium atom
BaCeO3 exhibits proton conductivity - 1.8 x
•
To
-1
cm-1
increase its conductivity and chemical
stability, it is doped with Yttrium at Ceria
Cerium atom
sites.
Yttrium atom

6. Three Dimensional View of Perovskite
Ba
O
Ce
ABO3 Structure
A
O3
B

7. Proton conduction mechanism

H 2O( g )  V  2Hi  O
H 2O( g )  V  O  2HO

8. Synthesis of Yttrium doped Barium Cerate (BCY) thin films by
Spray pyrolysis technique
Solution Concn
Substrate
Substrate temp.
Spray rate
0.1 M
Alumina
250 °C
1 ml/min
Chemical-1 Ba (NO3)2
Chemical-2 Ce(NO3)3
Chemical-3 Y(NO3)3
Solvent
Water
Schematic view of Spray pyrolysis techniques (SPT)

9. RESULTS AND DICUSSION
Thermo gravimetric analysis

10. XRD patterns of BCY films annealed at different temperature
1000 °C
900 °C
800 °C
JCPDS card
No. 82-2372
Annealing Crystallite
Temp. °C Size nm
1000
b = 6.246 Å C = 6.216 Å
35
11
700
a = 8.873Å
900
800
700 °C
26
10

11. SEM of BCY films
700 °C
900 °C
800 °C
1000 °C

12. DC-conductivity in (a) air (b) Argon atmosphere

13. CONCLUSIONS
BCY20 thin electrolyte has been deposited by
economical spray pyrolysis technique.
The phase pure and dense film is obtained at
900 °C.
The maximum value of dc conductivity in
argon at 600 °C is 2.45 × 10−3 S cm−1.
This method could be extended to form thin
electrolyte based SOFC.

14. Acknowledgment
• I like to acknowledge the UGC for financial
assistance under RGN- fellowship.

15. Thank you