Characterization of lithium borophosphate glass thin film electrolytes deposited by RF-magnetron sputtering for micro-batteries

Yongsub Yoon, Chanhwi Park, Junghoon Kim, Dong Wook Shin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Lithium ion conducting thin film electrolytes, Li 2O-B 2O 3-P 2O 5 glass systems, were prepared with a wide range of chemical composition by co-sputtering method with multi-targets. The maximum ionic conductivity at room temperature was 1.22 × 10 - 6 S/cm and the activation energy of this specimen was 0.54 eV when enhanced by the mixed former effect and the high network modifier content. The increased ion conductivity of the films appeared to be associated with the formation of stable tetrahedral borate at high lithium concentration and this structural change facilitated faster ion migrations. The relationship between the glass structure and electrical performance of the mixed former glasses was investigated by the infrared spectra analysis of borate networks. The conductivity of the mixed former electrolytes increased gradually with increasing the RF power on Li 2O target, and the maximum conductivity was obtained at 100 W. The structural role of the network modifier in xLi 2O-(1-x)(B 2O 3-P 2O 5) glasses was analyzed by the O1s spectra of X-ray Photoelectron Spectroscopy. A quantitative deconvolution of O1s spectra suggests that the increased conductivity with increasing lithium content is due to the formation of non-bridging oxygen.

Original languageEnglish
Pages (from-to)636-640
Number of pages5
JournalSolid State Ionics
Volume225
DOIs
StatePublished - 2012 Oct 4

Fingerprint

Borophosphate glass
Lithium
Magnetron sputtering
Electrolytes
electric batteries
magnetron sputtering
lithium
electrolytes
Glass
Thin films
conductivity
Borates
glass
Ions
thin films
borates
ions
Deconvolution
Ionic conductivity
Spectrum analysis

Keywords

  • Lithium borophosphate electrolytes
  • Multi-targets
  • RF-magnetron sputtering
  • Thin film batteries

Cite this

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title = "Characterization of lithium borophosphate glass thin film electrolytes deposited by RF-magnetron sputtering for micro-batteries",
abstract = "Lithium ion conducting thin film electrolytes, Li 2O-B 2O 3-P 2O 5 glass systems, were prepared with a wide range of chemical composition by co-sputtering method with multi-targets. The maximum ionic conductivity at room temperature was 1.22 × 10 - 6 S/cm and the activation energy of this specimen was 0.54 eV when enhanced by the mixed former effect and the high network modifier content. The increased ion conductivity of the films appeared to be associated with the formation of stable tetrahedral borate at high lithium concentration and this structural change facilitated faster ion migrations. The relationship between the glass structure and electrical performance of the mixed former glasses was investigated by the infrared spectra analysis of borate networks. The conductivity of the mixed former electrolytes increased gradually with increasing the RF power on Li 2O target, and the maximum conductivity was obtained at 100 W. The structural role of the network modifier in xLi 2O-(1-x)(B 2O 3-P 2O 5) glasses was analyzed by the O1s spectra of X-ray Photoelectron Spectroscopy. A quantitative deconvolution of O1s spectra suggests that the increased conductivity with increasing lithium content is due to the formation of non-bridging oxygen.",
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Characterization of lithium borophosphate glass thin film electrolytes deposited by RF-magnetron sputtering for micro-batteries. / Yoon, Yongsub; Park, Chanhwi; Kim, Junghoon; Shin, Dong Wook.

In: Solid State Ionics, Vol. 225, 04.10.2012, p. 636-640.

Research output: Contribution to journalArticle

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