Cold sintering process of Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte

Seth S. Berbano, Jing Guo, Hanzheng Guo, Michael T. Lanagan, Clive A. Randall

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The recently developed technique of cold sintering process (CSP) enables densification of ceramics at low temperatures, i.e., <300°C. CSP employs a transient aqueous solvent to enable liquid phase-assisted densification through mediating the dissolution-precipitation process under a uniaxial applied pressure. Using CSP in this study, 80% dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) electrolytes were obtained at 120°C in 20 minutes. After a 5 minute belt furnace treatment at 650°C, 50°C above the crystallization onset, Li-ion conductivity was 5.4 × 10−5S/cm at 25°C. Another route to high ionic conductivities ~10−4 S/cm at 25°C is through a composite LAGP - (PVDF-HFP) co-sintered system that was soaked in a liquid electrolyte. After soaking 95, 90, 80, 70, and 60 vol% LAGP in 1 M LiPF6 EC-DMC (50:50 vol%) at 25°C, Li-ion conductivities were 1.0 × 10−4 S/cm at 25°C with 5 to 10 wt% liquid electrolyte. This paper focuses on the microstructural development and impedance contributions within solid electrolytes processed by (i) Crystallization of bulk glasses, (ii) CSP of ceramics, and (iii) CSP of ceramic-polymer composites. CSP may offer a new route to enable multilayer battery technology by avoiding the detrimental effects of high temperature heat treatments.

Original languageEnglish (US)
Pages (from-to)2123-2135
Number of pages13
JournalJournal of the American Ceramic Society
Volume100
Issue number5
DOIs
StatePublished - May 1 2017

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Solid electrolytes
electrolyte
Sintering
ceramics
Electrolytes
conductivity
Crystallization
Densification
liquid
Liquids
crystallization
Ions
ion
Composite materials
Ionic conductivity
sintering
cold
Polymers
Multilayers
Dissolution

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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title = "Cold sintering process of Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte",
abstract = "The recently developed technique of cold sintering process (CSP) enables densification of ceramics at low temperatures, i.e., <300°C. CSP employs a transient aqueous solvent to enable liquid phase-assisted densification through mediating the dissolution-precipitation process under a uniaxial applied pressure. Using CSP in this study, 80{\%} dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) electrolytes were obtained at 120°C in 20 minutes. After a 5 minute belt furnace treatment at 650°C, 50°C above the crystallization onset, Li-ion conductivity was 5.4 × 10−5S/cm at 25°C. Another route to high ionic conductivities ~10−4 S/cm at 25°C is through a composite LAGP - (PVDF-HFP) co-sintered system that was soaked in a liquid electrolyte. After soaking 95, 90, 80, 70, and 60 vol{\%} LAGP in 1 M LiPF6 EC-DMC (50:50 vol{\%}) at 25°C, Li-ion conductivities were 1.0 × 10−4 S/cm at 25°C with 5 to 10 wt{\%} liquid electrolyte. This paper focuses on the microstructural development and impedance contributions within solid electrolytes processed by (i) Crystallization of bulk glasses, (ii) CSP of ceramics, and (iii) CSP of ceramic-polymer composites. CSP may offer a new route to enable multilayer battery technology by avoiding the detrimental effects of high temperature heat treatments.",
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Cold sintering process of Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte. / Berbano, Seth S.; Guo, Jing; Guo, Hanzheng; Lanagan, Michael T.; Randall, Clive A.

In: Journal of the American Ceramic Society, Vol. 100, No. 5, 01.05.2017, p. 2123-2135.

Research output: Contribution to journalArticle

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AU - Berbano, Seth S.

AU - Guo, Jing

AU - Guo, Hanzheng

AU - Lanagan, Michael T.

AU - Randall, Clive A.

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