Structural, morphological and thermo gravimetric analysis of
spray pyrolysed Y doped BaCeO3 (BCY) thin films
By
Snehal U. ...
Outline of Presentation

1. INTRODUCTION
2. EXPERIMENTAL
 BCY – perovskite structure
 Synthesis of Yttrium doped Barium ...
Introduction of fuel cell and types of fuel Cell
Fuel cell type
Polymer
electrolyte
membrane fuel
cell (PEMFC)

Mobile Ion...
Advantages of SOFC

 Higher efficiency.
 Low cost electrode materials can be used instead of
expensive noble metals such...
Chemicals and materials
BCY –perovskite structure

•

The different perovskite based materials have

been

explored

elect...
Three Dimensional View of Perovskite
Ba

O
Ce

ABO3 Structure

A

O3
B
Proton conduction mechanism


H 2O( g )  V  2Hi  O

H 2O( g )  V  O  2HO
Synthesis of Yttrium doped Barium Cerate (BCY) thin films by
Spray pyrolysis technique
Solution Concn

Substrate

Substrat...
RESULTS AND DICUSSION
Thermo gravimetric analysis
XRD patterns of BCY films annealed at different temperature

1000 °C

900 °C
800 °C

JCPDS card
No. 82-2372

Annealing Cry...
SEM of BCY films
700 °C

900 °C

800 °C

1000 °C
DC-conductivity in (a) air (b) Argon atmosphere
CONCLUSIONS

BCY20 thin electrolyte has been deposited by
economical spray pyrolysis technique.
The phase pure and dense...
Acknowledgment

• I like to acknowledge the UGC for financial
assistance under RGN- fellowship.
Thank you
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228 presentation iit bombay new

  1. 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. 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. 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. 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. 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. 6. Three Dimensional View of Perovskite Ba O Ce ABO3 Structure A O3 B
  7. 7. Proton conduction mechanism  H 2O( g )  V  2Hi  O H 2O( g )  V  O  2HO
  8. 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. 9. RESULTS AND DICUSSION Thermo gravimetric analysis
  10. 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. 11. SEM of BCY films 700 °C 900 °C 800 °C 1000 °C
  12. 12. DC-conductivity in (a) air (b) Argon atmosphere
  13. 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. 14. Acknowledgment • I like to acknowledge the UGC for financial assistance under RGN- fellowship.
  15. 15. Thank you

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