Conductivity of a new pyrophosphate Sn0.9Sc0.1(P2O7)(1-delta) prepared by an aqueous solution method

Rong Lan, Shanwen Tao

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

New pyrophosphate Sn0.9Sc0.1(P2O7)(1-delta) was prepared by an aqueous solution method. The structure and conductivity of Sn0.9Sc0.1(P2O7)(1-delta) have been investigated. XRD analysis indicates that Sn0.9Sc0.1(P2O7)(1-delta) exhibits a 3 x 3 x 3 superstructure. It was found that Sn0.9Sc0.1(P2O7)(1-delta) prepared by an aqueous method is not conductive. The total conductivity of Sn0.9Sc0.1(P2O7)(1-delta) in open air is 2.35 x 10(-6) and 2.82 x 10(-9) S/cm at 900 and 400 degrees C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 X 10(-7) S/cm at 400 degrees C) than in open air indicating some proton conduction. SnP2O7 and Sn0.92In0.08(P2O7)(1-delta) prepared by an acidic method were reported fairly conductive but prepared by similar solution methods are not conductive. Therefore, the conductivity of SnP2O7-based materials might be related to the synthetic history. The possible conduction mechanism of SnP2O7-based materials has been discussed in detail.

Original languageEnglish
Pages (from-to)380-385
Number of pages6
JournalJournal of Alloys and Compounds
Volume486
Issue number1-2
DOIs
Publication statusPublished - 3 Nov 2009

Keywords

  • conductivity
  • pyrophosphate
  • structure
  • Sn0.9Sc0.1(P2O7)(1-delta)
  • temperature fuel cells
  • intermediate temperature
  • proton conductor
  • IN3+-DOPED SNP2O7
  • electrolyte
  • TIP2O7
  • oxides
  • ZRP2O7
  • superstructure
  • acid

Fingerprint Dive into the research topics of 'Conductivity of a new pyrophosphate Sn0.9Sc0.1(P2O7)(1-delta) prepared by an aqueous solution method'. Together they form a unique fingerprint.

Cite this