Structure and Electric Properties of Lithium Phosphate Glasses

Соколов, И. А.; Tarlakov, Yu. P.; Ustinov, N. Yu.; Пронкин, А. А.

doi:10.1007/s11167-005-0383-z

Cited by 15 publications

(9 citation statements)

References 5 publications

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“…In addition, the polarization of the structural chemical units is of higher degree, resulting in decreasing the tightness of fixation of lithium ions in the structure, which is beneficial to the mobility of lithium ions. Hence the ionic conductivity is improved owing to a drop in the activation energy of conductivity [45,47]. Extrapolation of the lines in figure 4(d) reads an ionic conductivity of 3.3 × 10 −8 S cm −1 at RT, for thin film LPO300.…”

Section: Resultsmentioning

confidence: 90%

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Atomic layer deposition of lithium phosphates as solid-state electrolytes for all-solid-state microbatteries

et al. 2014

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Atomic layer deposition (ALD) has been shown as a powerful technique to build three-dimensional (3D) all-solid-state microbattery, because of its unique advantages in fabricating uniform and pinhole-free thin films in 3D structures. The development of solid-state electrolyte by ALD is a crucial step to achieve the fabrication of 3D all-solid-state microbattery by ALD. In this work, lithium phosphate solid-state electrolytes were grown by ALD at four different temperatures (250, 275, 300, and 325 °C) using two precursors (lithium tert-butoxide and trimethylphosphate). A linear dependence of film thickness on ALD cycle number was observed and uniform growth was achieved at all four temperatures. The growth rate was 0.57, 0.66, 0.69, and 0.72 Å/cycle at deposition temperatures of 250, 275, 300, and 325 °C, respectively. Furthermore, x-ray photoelectron spectroscopy confirmed the compositions and chemical structures of lithium phosphates deposited by ALD. Moreover, the lithium phosphate thin films deposited at 300 °C presented the highest ionic conductivity of 1.73 × 10(-8) S cm(-1) at 323 K with ~ 0.51 eV activation energy based on the electrochemical impedance spectroscopy. The ionic conductivity was calculated to be 3.3 × 10(-8) S cm(-1) at 26 °C (299 K).

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Section: Resultsmentioning

confidence: 90%

“…The ionic conductivity is related to the migration of lithium ions in the thin films. The oxygen shared by SUs are negatively charged and lithium ions are dissociated from the polar structural chemical units, hopping from one to another to achieve the migration [47]. Another factor is the lithium concentration in the thin films.…”

Section: Resultsmentioning

confidence: 99%

Atomic layer deposition of lithium phosphates as solid-state electrolytes for all-solid-state microbatteries

et al. 2014

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“…We postulate that the rapid dehydration associated with PIC prevents rigid organization within lms resulting in non-bridging oxygen atoms with which Li ions are able to associate to give a non-random hopping mechanism of conduction. 34,35 However, the actual annealing temperature is also important. Annealing at 400 C resulted in a reduction in observed ionic conductivity (s ¼ 1.6 Â 10 À10 S cm À1 ).…”

Section: Resultsmentioning

confidence: 99%

Low-temperature fabrication of lithium aluminum oxide phosphate solid electrolyte thin films from aqueous precursors

et al. 2017

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“…Hereafter, we used the density values of 2.35 g/cm 3 [12,13] for the LiPO 3 glass and 2.65 g/cm 3 [14] for SiO 2 .…”

Section: Methodsmentioning

confidence: 99%

The transport properties of the composition glassy LiPO3/crystalline SiO2 system

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et al. 2014

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The glassy LiPO 3 /crystalline SiO 2 (0-20 vol%) composite solid electrolytes have been obtained by glass softening. The XRD data confirmed that the amorphous state of LiPO 3 was retained in the composite. The transport characteristics were measured by impedance spectroscopy and NMR technique with 6 Li and 7 Li isotopes. The concentration dependences of specific conductivity have a maximum at 5 vol% of SiO 2 . According to the conductivity data fitting with a mixture equation, the conductivity of LiPO 3 /SiO 2 layer is 8.6 (at 50°C) to 17 (at 200°C) times higher compared with the starting LiPO 3 glass. The NMR data confirm that the number of mobile Li ions in the composite increases. In case of porousless composites, the conductivity maximum was at 15 vol% of SiO 2 . Thus, a slight composite effect was found in the examined glassy LiPO 3 /crystalline SiO 2 system.

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Structure and Electric Properties of Lithium Phosphate Glasses

Cited by 15 publications

References 5 publications

Atomic layer deposition of lithium phosphates as solid-state electrolytes for all-solid-state microbatteries

Atomic layer deposition of lithium phosphates as solid-state electrolytes for all-solid-state microbatteries

Low-temperature fabrication of lithium aluminum oxide phosphate solid electrolyte thin films from aqueous precursors

The transport properties of the composition glassy LiPO3/crystalline SiO2 system

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