Page 11 - High Temperature Solid Oxide Fuel Cells Fundamentals, Design and Applications

viii High Temperature Solid Oxide Fuel CeJIs: Fundamentals, Design and Applications

8.2.1.1 Cell Fabrication Based on
Particulate Approach 205
8.2.1.2 Cell Fabrication Based on
Deposition Approach 206
8.2.2 Cell and Stack Performance 208
8.3 Tubular SOFC Design 210
8.3.1 Cell Operation and Performance 213
8.3.2 Tubular Cell Stack 2 14
8.3.3 Alternative Tubular Cell Designs 216
8.4 Microtubular SOFC Design 219
8.4.1 Microtubular SOFC Stacks 222
8.5 Summary 224
References 22 5

Chapter 9. Electrode Polarisations
9.1 Introduction 230
9.2 Ohmic Polarisation 232
9.3 Concentration Polarisation 233
9.4 Activation Polarisation 237
9.4.1 Cathodic Activation Polarisation 243
9.4.2 Anodic Activation Polarisation 249
9.5 Measurement of Polarisation (By Electrochemical
Impedance Spectroscopy) 251
9.6 Summary 257
References 257

Chapter 10 Testing of Electrodes, Cells and Short Stacks
10.1 Introduction 261
10.2 Testing Electrodes 262
10.3 Testing Cells and 'Short' Stacks 267
10.4 Area-Specific Resistance (ASR) 2 72
10.5 Comparison of Test Results on Electrodes and
on Cells 277
10.5.1 Non-activated Contributions to the
Total Loss 280
10.5.2 Inaccurate Temperature Measurements 2 80
10.5.3 Cathode Performance 281
10.5.4 Impedance Analysis of Cells 282
10.6 The Problem of Gas Leakage in Cell Testing 283
10.6,l Assessment of the Size of the Gas Leak 284
10.7 Summary 286
References 286

Chapter 11 Cell, Stack and System Modelling
1 1.1 Introduction 293
11.2 Flow and Thermal Models 294