Dielectric properties, conductivity and Li+ ion motion in LiPON thin films

Van‐Jodin, Lucie Le; Ducroquet, F.; Sabary, F.; Chevalier, Isabelle

doi:10.1016/j.ssi.2013.09.031

Cited by 98 publications

(76 citation statements)

References 22 publications

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“…For LiPON and LiSiPON‐A, the mobile carrier concentration is at the order of 10 20 cm −3 . This value is similar to the typical value in LiPON film . However, for LiSiPON‐B and LiSiPON‐C, which have higher Si content in the films, the carrier concentration density decreased to the order of 10 18 cm −3 .…”

Section: Resultssupporting

confidence: 83%

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Electrochemical properties and optical transmission of high Li⁺ conducting LiSiPON electrolyte films

Su¹,

Falgenhauer²,

Leichtweiß

et al. 2016

Physica Status Solidi (b)

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Lithium silicon phosphorus oxynitride (LiSiPON) thin films with different compositions have been prepared by RF magnetron sputtering in N2 by using three targets xLi2SiO3 · (1 − x) Li3PO4 with x = 0.1, 0.3, and 0.5. Compared with LiPON, the electrical properties of LiSiPON have been improved by introducing silicon. LiSiPON films deposited from the target 0.5Li2SiO3 · 0.5Li3PO4 yield the highest ionic conductivity of up to 9.7 × 10−6 S cm−1 with an activation energy of only 0.41 eV. The main mechanism for increasing ionic conductivity is the enhancement of carrier mobility. By DC polarization measurements the electronic partial conductivity was found at least seven orders of magnitude smaller than the ionic conductivity. Linear voltammetry results showed that the LiSiPON films are electrochemically stable in contact with stainless steel in the voltage range of 0–6 V. The substitution of silicon for phosphorus in the film evidenced from X‐ray photoelectron spectroscopy analysis indicated silicon in the film will create more abundant cross‐linking structures Si–O–P and (P, Si)–N < (P, Si), hence created more Li+ conducting paths which favored the higher mobility of lithium ions and larger ionic conductivity. The optical bandgap was found to decrease with increasing silicon content. We demonstrate that the prepared LiSiPON films with their larger ionic conductivity and low electronic conductivity may serve as an alternative to LiPON for applications in high energy density and high voltage lithium batteries.

show abstract

Section: Resultssupporting

confidence: 83%

“…Furthermore, in order to obtain more detailed information of temperature dependence of ionic conductivity mechanism, we analyze the complex impedance by following the method described in reference . The carrier concentration p 0 and the mobility µ can be calculated from the conductivity and permittivity as a function of frequency.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical properties and optical transmission of high Li⁺ conducting LiSiPON electrolyte films

Su¹,

Falgenhauer²,

Leichtweiß

et al. 2016

Physica Status Solidi (b)

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“…The cyclic voltamperometry curve is shown in red in Figure The same peaks as in liquid cell are observed, but they are widened and shifted to a higher voltage in oxidation and to a lower voltage in reduction. This is due to the internal resistance of the all‐solid‐state microbattery, given by the resistivity of interfaces and LiPON . The difference between the charge capacity and the discharge capacity is relatively high (28%).…”

Section: Resultsmentioning

confidence: 99%

Ex situ and operando study of LiCoO₂ thin films by Raman spectroscopy: Thermal and electrochemical properties

Van‐Jodin

Rouchon

et al. 2019

J Raman Spectroscopy

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Lithiated transition metal oxides are active materials used as positive electrode in lithium ion cells thanks to their high capacity and air stability when. Amongst lithiated oxides, LiCoO2 is the most commonly and practically used due to its high‐specific energy and its excellent cycle life. This work focuses on phase transformation of LiCoO2 thin films during the annealing step and during the cycling life. The formation of unwanted products is highlighted by an innovative method: in situ Raman analysis. During the annealing used to transform the almost amorphous as‐deposited LiCoO2 into the rhombohedral structure useful for electrochemical cycling, the formation of Co3O4 has been observed. The second studied phase transformation is due to the electrochemical cycling and highlights the kinetics of the structure change. The study was done by comparing ex situ and operando results and highlights the main advantages of operando analysis: more data in a shorter time and the ability to assess the time dependence of phenomena.

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“…We note that, for the systems of interest, the bulk free-energy can be conveniently simplified, without significant loss of accuracy, by neglecting the terms with the electric permittivity ε. Thus, for the example of LIPON with ε ∼ 10 −7 F/m [38] and with 1% of straining at 1000 V the elastic stress is estimated to be in the order of 100 times the Maxwell stress. The last line in (2) accounts for the entropy of mixing of the intercalated lithium ions.…”

Section: Bulk Free-energy and Lithium Transport Through Electrolytementioning

confidence: 98%

Effect of prestress on the stability of electrode–electrolyte interfaces during charging in lithium batteries

Natsiavas

Weinberg

Rosato³

et al. 2016

Journal of the Mechanics and Physics of Solids

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Dielectric properties, conductivity and Li+ ion motion in LiPON thin films

Cited by 98 publications

References 22 publications

Electrochemical properties and optical transmission of high Li⁺ conducting LiSiPON electrolyte films

Electrochemical properties and optical transmission of high Li⁺ conducting LiSiPON electrolyte films

Ex situ and operando study of LiCoO₂ thin films by Raman spectroscopy: Thermal and electrochemical properties

Effect of prestress on the stability of electrode–electrolyte interfaces during charging in lithium batteries

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Dielectric properties, conductivity and Li+ ion motion in LiPON thin films

Cited by 98 publications

References 22 publications

Electrochemical properties and optical transmission of high Li+ conducting LiSiPON electrolyte films

Electrochemical properties and optical transmission of high Li+ conducting LiSiPON electrolyte films

Ex situ and operando study of LiCoO2 thin films by Raman spectroscopy: Thermal and electrochemical properties

Effect of prestress on the stability of electrode–electrolyte interfaces during charging in lithium batteries

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Product

Resources

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Electrochemical properties and optical transmission of high Li⁺ conducting LiSiPON electrolyte films

Electrochemical properties and optical transmission of high Li⁺ conducting LiSiPON electrolyte films

Ex situ and operando study of LiCoO₂ thin films by Raman spectroscopy: Thermal and electrochemical properties