Crystalline phase content and ionic conductivity correlation in LATP glass-ceramic

Swati Soman; Yoshiki Iwai; Junichi Kawamura; Ajit Kulkarni

doi:10.1007/s10008-011-1592-4

Crystalline phase content and ionic conductivity correlation in LATP glass-ceramic

Swati Soman, Yoshiki Iwai, Junichi Kawamura, Ajit Kulkarni

NanoTerasu Co-Creation Promotion Division

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

Li ₂O-Al ₂O ₃-TiO ₂-P ₂O ₅ (LATP) glass was fabricated by conventional melt quenching route. Glass transition temperature (T _g=296 °C) and crystallization temperatures (T _C1,2) were obtained from thermal analysis. LATP glass was converted to glass-ceramic by heat treatment in the range 550-950 °C for 6 h. X-ray diffraction analysis revealed LiTi ₂(PO ₄) ₃ as a major phase. Ionic conductivity increased monotonically with concentration, reaching a maximum of ∼10 ^-4 S/cm. AlPO ⁴ phase was detected in samples heat-treated above 850 °C. Its presence decreased the conductivity, suggesting LiTi ₂(PO ₄) ₃ phase as main contributor to high ionic conductivity. NMR spectra confirmed the presence of mobile ⁷Li ions in the entire sample series and also gave some information on the structure and dynamics of conductivity.

Original language	English
Pages (from-to)	1761-1766
Number of pages	6
Journal	Journal of Solid State Electrochemistry
Volume	16
Issue number	5
DOIs	https://doi.org/10.1007/s10008-011-1592-4
Publication status	Published - 2012 May

Keywords

Electrical conductivity
Glass-ceramic
LATP glass
Solid electrolytes

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title = "Crystalline phase content and ionic conductivity correlation in LATP glass-ceramic",

abstract = "Li 2O-Al 2O 3-TiO 2-P 2O 5 (LATP) glass was fabricated by conventional melt quenching route. Glass transition temperature (T g=296 °C) and crystallization temperatures (T C1,2) were obtained from thermal analysis. LATP glass was converted to glass-ceramic by heat treatment in the range 550-950 °C for 6 h. X-ray diffraction analysis revealed LiTi 2(PO 4) 3 as a major phase. Ionic conductivity increased monotonically with concentration, reaching a maximum of ∼10 -4 S/cm. AlPO 4 phase was detected in samples heat-treated above 850 °C. Its presence decreased the conductivity, suggesting LiTi 2(PO 4) 3 phase as main contributor to high ionic conductivity. NMR spectra confirmed the presence of mobile 7Li ions in the entire sample series and also gave some information on the structure and dynamics of conductivity.",

keywords = "Electrical conductivity, Glass-ceramic, LATP glass, Solid electrolytes",

author = "Swati Soman and Yoshiki Iwai and Junichi Kawamura and Ajit Kulkarni",

note = "Funding Information: The authors acknowledge Department of Science and Technology, Govt. of India (DST)–Japanese Science and Technology (JST) collaborative program. The authors thank Indian Institute of Technology Bombay and Tohoku University for infrastructural support. SS thanks DST for financial support.",

year = "2012",

month = may,

doi = "10.1007/s10008-011-1592-4",

language = "English",

volume = "16",

pages = "1761--1766",

journal = "Journal of Solid State Electrochemistry",

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AU - Soman, Swati

AU - Iwai, Yoshiki

AU - Kawamura, Junichi

AU - Kulkarni, Ajit

N1 - Funding Information: The authors acknowledge Department of Science and Technology, Govt. of India (DST)–Japanese Science and Technology (JST) collaborative program. The authors thank Indian Institute of Technology Bombay and Tohoku University for infrastructural support. SS thanks DST for financial support.

PY - 2012/5

Y1 - 2012/5

N2 - Li 2O-Al 2O 3-TiO 2-P 2O 5 (LATP) glass was fabricated by conventional melt quenching route. Glass transition temperature (T g=296 °C) and crystallization temperatures (T C1,2) were obtained from thermal analysis. LATP glass was converted to glass-ceramic by heat treatment in the range 550-950 °C for 6 h. X-ray diffraction analysis revealed LiTi 2(PO 4) 3 as a major phase. Ionic conductivity increased monotonically with concentration, reaching a maximum of ∼10 -4 S/cm. AlPO 4 phase was detected in samples heat-treated above 850 °C. Its presence decreased the conductivity, suggesting LiTi 2(PO 4) 3 phase as main contributor to high ionic conductivity. NMR spectra confirmed the presence of mobile 7Li ions in the entire sample series and also gave some information on the structure and dynamics of conductivity.

AB - Li 2O-Al 2O 3-TiO 2-P 2O 5 (LATP) glass was fabricated by conventional melt quenching route. Glass transition temperature (T g=296 °C) and crystallization temperatures (T C1,2) were obtained from thermal analysis. LATP glass was converted to glass-ceramic by heat treatment in the range 550-950 °C for 6 h. X-ray diffraction analysis revealed LiTi 2(PO 4) 3 as a major phase. Ionic conductivity increased monotonically with concentration, reaching a maximum of ∼10 -4 S/cm. AlPO 4 phase was detected in samples heat-treated above 850 °C. Its presence decreased the conductivity, suggesting LiTi 2(PO 4) 3 phase as main contributor to high ionic conductivity. NMR spectra confirmed the presence of mobile 7Li ions in the entire sample series and also gave some information on the structure and dynamics of conductivity.

KW - Electrical conductivity

KW - Glass-ceramic

KW - LATP glass

KW - Solid electrolytes

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EP - 1766

JO - Journal of Solid State Electrochemistry

JF - Journal of Solid State Electrochemistry

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Crystalline phase content and ionic conductivity correlation in LATP glass-ceramic

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