Theoretical approaches to superionic conductivity

Bulletin of Materials Science - Tập 27 - Trang 1-17 - 2004
C. S. Sunandana1, P. Senthil Kumar
1School of Physics, University of Hyderabad, Hyderabad, India

Tóm tắt

Recent theoretical approaches to the understanding of superionic conductivity in polycrystalline, glassy and polymeric materials are briefly reviewed. Phase transitions to the superionic conducting state in the AgI family are apparently triggered by cluster formation and strong mobile ion interaction within the clusters. Anomalous conductivity and related physical properties are explained in the cluster induced distortion model. Ionic composites such as AgX : Al2O3 (X = Cl, Br and I) involve conducting and non-conducting phases and the all-important interface between the two whose space charge enhances the conductivity and also trigger phase transitions to exotic polymorphic phases, for which the mechanisms are yet to be explored. Ion hopping dynamics controls the conductivity of superionic glasses. Mode coupling and jump relaxation theories account for the non-Debye relaxation observed in a.c. conductivity of these glasses. The theory of conductivity in polymer electrolytes—still in its infancy—involves their complex structure and glass transition behaviour. Preparative and thermal history, composition and crystallinity control ionic conductivity. New approaches to the synthesis of optimal polymer electrolytes such as rubbery electrolytes, crystalline polymers and nanocomposites must be considered before achieving a comprehensive theoretical understanding.

Tài liệu tham khảo

Angell C Aet al 1993Nature 362 137 Aniya M and Wakamura K 1998Solid state ionics: Science and technology (eds) B V R Chowdariet al (Singapore: World Scientific) p. 43 Aniya M 2000aSolid State Ionics 136–137 1085 Aniya M 2000bSolid state ionics: Materials and devices (eds) B V R Chowdari and W Wang (Singapore: World Scientific) p. 51 Bhattacharya A Jet al 1997Solid State Ionics 95 283 Bhattacharya A Jet al 1999Phys. Rev. B60 909 Chandra A and Chandra S 1994Phys. Rev. B49 633 and references therein Croce Fet al 1998Nature 394 456 Funke K 1997Defects and Diffusion Forum 143–147 1243 Funke K and Wilmer D 2000Solid State Ionics 136–137 1329 and references therein Funke Ket al 1996Solid State Ionics 85 293 Funke Ket al 1997Solid State Ionics 94 27 Gadjourova Zet al 2001Nature 412 520 Govindaraj G and Murugaraj R 2000Mater. Sci. and Eng. B77 60 Hairetdinov E Fet al 1994Phys. Rev. B50 13259 Ingram M D 1998Solid state ionics: Science and technology (eds) B V R Chowdariet al (Singapore: World Scientific) p. 21 Ishii T and Kamishima O 1999J. Phys. Soc. Jpn 68 3580 Ishii T and Abe T 1999J. Phys. Soc. Jpn 68 3127 and references therein Jain H 1999Metal Mater. & Process. 11 317 Kato Yet al 1981Solid State Ionics 40/41 632 Kawamura J and Shimoji M 1986J. Non-Cryst. Solids 88 295 Kvist A and Josefson A M 1968Z. Naturforsch. 23a 625 Laskar A L 1992Solid state ionics (eds) S Chandraet al (Singapore: World Scientific) p. 459 Lee J Set al 2000J. Electrochem. Soc. 147 2407 and references therein Lidiard AB 1957Handb. Phys. 20 246 Maass Pet al 1996Phys. Rev. Lett. 77 1528 Maier J 1985Mater. Res. Bull. 20 383 Maier J 2000Z. Anorg. Allg. Chem. 426 264 Ngai K L 1980Com. Solid State Phys. 9 141 Nolting J and Rein D 1969Z. Phys. Chem. Neue Folge 66 150 Ogawa H and Kobayashi M 2002Solid State Ionics 148 211 Rao K J 2002Structural chemistry of glasses (Amsterdam: Elsevier) Patnaik J R G and Sunandana C S 1998J. Phys. Chem. Solids 59 1059 Salamon M B 1975Physics of superionic conductors (Berlin: Springer) Senthil Kumar P, Kini N S, Umarji A M and Sunandana C S 2000 inSolid state ionics: Materials and devices (eds) B V R Chowdari and W Wang (Singapore: World Scientific) pp 121–124 Shastry M C R and Rao K J 1989Solid State Ionics 37 17 Shukla P K and Agrawal S L 1998Solid state ionics: Science and technology (eds) B V R Chowdariet al (Singapore: World Scientific) p. 211 Shukla A K and Sharma V 1992Solid state ionics (eds) S Chandraet al (Singapore: World Scientific) p. 91 and references therein Suresh Chandra 1981Superionic solids: Principles and applications (Amsterdam: North Holland) Sunandana C S1995Bull. Mater. Sci. 18 17 Sunandana C S 1997J. Phys. Chem. Solids 58 1359 SunandanaC S 1998Bull. Mater. Sci. 21 1 Sunandana C S and Senthil Kumar P 2003 (in preparation) Takahashi H 1987J. Phys. Soc. Jpn 56 2520 Tarafdar S 2001Ion conducting materials (eds) A R Kulkarni and P Gopalan (New Delhi: Narosa) p. 1 Uvarov N F 2000Solid state ionics 136–137 1267 Vidyullatha M and Sunandana C S 1993Solid State Commun. 88 553