Solid State Ionics : Materials & Devices, Procs of the 7th Asian Conf.

Description

Solid state ionics, being a multidisciplinary area, is expected to grow at a faster rate in the new millennium, prompting the discovery of new materials and devices, as well as helping to optimize the known devices, especially the portable power sources and display systems. The Asian Society for Solid State Ionics (ASSSI) plays a significant role in bringing together researchers from the Asian countries, every two years, to exchange notes and ideas, to foster friendship and collaboration, and to discuss the prospects. The topics covered in this volume are: ion dynamics, theoretical modeling, io.  Read more... PREFACE CONTENTS [A] CRYSTALLINE MATERIALS CONCEPTS AND MATERIALS ASPECTS OF DEVELOPING SOLID STATE IONIC DEVICES 1. INTRODUCTION 2. GENERAL ASPECTS 2.1. Generation of Cell Voltages 2.2. Chemistry of Electrons 3. CONTRADICTIONS 3.1. Stability-Mobility Dilemma 3.2. Stability-Conduction Type Dilemma 3.3. Non-Stoichiometry-Diffusion Dilemma 4. MATERIALS CONSIDERATIONS 4.1. Thermodynamic -- Electronic Relationships 4.2. Structural Disorder of Solid Electrolytes 4.3. Chemical Stability 4.4. Dopants for Changing the Minority Charge Carrier Concentrations. 4.5. Enhanced Kinetics in the Solid State4.6. Long-term Polarization Effects 5. DEVICE CONSIDERATIONS 5.1. Chemical Interface Stability 5.2. Monolithic Systems 5.3. Electrode Stoichiometry 6. CONCLUSIONS 7. REFERENCES FAILURE OF THE NERNST-EINSTEIN EQUATION IN MIXEDCONDUCTOR COMPOUNDS 1. INTRODUCTION 2. THEORETICAL BACKGROUND 3. IONIC TRANSFERENCE NUMBER OF CoO 4. TOTAL CONDUCTIVITY AND TRACER DIFFUSIVITY 5. COMPARISON OF /, AND t[0&gt 6. CHARGE OF TRANSPORT 7. CONCLUDING REMARKS 8. ACKNOWLEDGEMENTS 9. REFERENCES. ION DYNAMICS IN SUPERIONIC CRYSTALSBY MEANS OF HOLE BURNING SPECTROSCOPY1. INTRODUCTION 2. EXPERIMENTAL 3. RESULTS AND DISCUSSION 3-1. ^""-alumina 3.2. Proton conductors 4. SUMMARY 5. ACKNOWLEDGMENTS 6. REFERENCES FLUORIDE ION CONDUCTOR RSmR (R=K AND Rb) STUDIED BY X-RAYDETRACTION AND 19F, 119Sn NMR ABSTRACT INTRODUCTION EXPERIMENTAL RESULTS AND DISCUSSION ACKNOWLEDGEMENT REFERENCES DEVELOPMENT OF ELECTROCHEMICAL MEASUREMENTS IN IONICSMATERIALS : NEUTRON RADIOGRAPHY 1. Introduction 2. Principle and feature ofneutron radiography ' 3. Experimental method. 3.1. preparation of samples3.2. Electrolyzing of samples 3.3. Radiographic procedures 3.4. Digitalizing procedures 4. Lithium ion movement in Ca].llLi2xW04 ceramics 2'3 5. Lithium ion movement in Li, 33Ti, 6 704ceramics 6. Lithium Ion movement in a mixed conductor LiFeTi048 7. Summary and prospect REFERENCES ESTIMATION OF THE SUPERIONIC TRANSITION TEMPERATUREFROM THE VARIATION OF BOND ORBITAL ENERGY 1. INTRODUCTION 2. BONDING ORBITAL ENERGY 3. SUPERIONIC TRANSITION TEMPERATURE 4. CONCLUSION ACKNOWLEDGEMENTS REFERENCES. THE EFFECT OF SINTERING ON THE ELECTRICAL CONDUCTIVITY OFLITHIUM LANTHANUM TITANATESINTRODUCTION EXPERIMENTAL RESULTS AND DISCUSSION CONCLUSION ACKNOWLEDGEMENTS REFERENCES THE STUDY OF NEW LITHIUM FAST ION CONDUCTOR L'i+2x+yAlYYyTi2.x_ySixP3.xOn BASED ON KAOLINITE 1. INTRODUCTION 2. EXPERIMENT 2.1. Materials 2.2. Solid State Reaction 2.3. X-ray Powder Diffraction Analysis 2.4. Electrical Conductivity Measurements 3. RESULTS AND DISCUSSION 3.1. Phase Relationship 3.2. Unit-cell Parameters 3.3. Electrical Conductivity 4. SUMMARY 5. ACKNOWLEDGEMENTS 6. REFERENCES.