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Ionic Conductivity and Crystal Structure of TM-Doped Mg0.5Ti2(PO4)3 (TM = Fe, Mn, Co and Nb)

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Abstract:

New Magnesium-Ion Conductors, TM-Doped Mg0.5Ti2(PO4)3 (TM = Fe, Mn, Co and Nb), Have Been Prepared by Sol-Gel Method. In Addition, their Crystal Structure Has Been Refined by Rietveld Technique and the Conductivity Has Been Evaluated by Ac Impedance Method. The Samples Were Sintered at 1150°C for 2 H (Fe, Mn and Co) or 1200°C for 10 H (Nb). For All Samples, Three Resistance Components Attributed to Grain, Grain Boundary and the Interface of Electrolyte-Electrode Were Successfully Separated as a Result of Sintering Accompanied by Grain Growth Reaching to 5 to 10 µm. The Change of Ionic Conductivity Will Be Discussed in Relation to the Dopants and their Crystal Structures.

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Info:

Periodical:

Key Engineering Materials (Volume 508)

Pages:

291-299

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.508.291

Citation:

Cite this paper

Online since:

March 2012

Authors:

Hiroo Takahashia, Hitoshi Takamura

Keywords:

Ionic Conductor, Nasicon-Type Structure, Phosphate, Structural Analysis

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