Electrochemical behaviors of nonstoichiometric silicon suboxides (SiOx) film prepared by reactive evaporation for lithium rechargeable batteries

Takezawa, Hideharu; Iwamoto, Kazuya; Ito, Simon; Yamada, Hiroshi

doi:10.1016/j.jpowsour.2013.02.077

Cited by 115 publications

(68 citation statements)

References 24 publications

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“…This indicates a substitution of a nitrogen atom by an oxygen atom in the O x –Si–N y tetrahedron . In addition, the third peak observed at 100.8 eV is related to the Si–O–Li (S3) bond in Li silicates (possibly Li 4 SiO 4 ) . In order to obtain quantitative information of each bonding states, we can define the area under the Gaussian–Lorentzian curve in the XPS as a quantitative measurement of the amount of each bonding state.…”

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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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.

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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 commercial SiO x is mainly prepared via an expensive fabrication process involving vacuum evaporation of Si and/or SiO 2 at high temperatures (above 1400 C) [18,19]. One can reasonably expect that wet chemistry routes could simplify the preparation process and therefore appropriately reduce the high cost of SiO x materials.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient and scalable synthesis of SiOx/C composite with core-shell nanostructure as high-performance anode material for lithium ion batteries

Zhao

Gao

et al. 2015

Electrochimica Acta

114

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“…Among these, nanocomposite materials of Si/SiO x , which consist of an active nanoscale silicon phases surrounded by a less‐active amorphous SiO x phase, have shown excellent long‐term cycling performance with a high capacity of more than 800 mA h g −1 . However, several technical issues, including low initial Coulombic efficiency and high production cost, should be resolved to ensure the practical success of silicon anode materials …”

Section: Methodsmentioning

confidence: 99%

“…[7][8][9][10][11] Among these, nanocomposite materials of Si/SiO x ,w hich consisto fa n active nanoscale silicon phases surrounded by al ess-active amorphous SiO x phase, have shown excellent long-termc ycling performance with ah igh capacity of more than 800 mA hg À1 .H owever,s everalt echnical issues, including low initial Coulombic efficiency and highp roduction cost, should be resolved to ensure the practical success of silicon anode materials. [12][13][14][15][16] One effectivew ay to improve the electrochemical performance of silicon-based anode materials is to introduce an electrically conductive shell layer on the surface of the siliconbased materials. For example, it is well-known that carbonaceous materials improvethe electrochemical reversibility of silicon-based anode materials.…”

mentioning

confidence: 99%

Si/SiO_x‐Conductive Polymer Core‐Shell Nanospheres with an Improved Conducting Path Preservation for Lithium‐Ion Battery

et al. 2016

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Non-stoichiometric SiO based materials have gained much attention as high capacity lithium storage materials. However, their anode performance of these materials should be further improved for their commercial success. A conductive polymer, poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS), is employed as a flexible electrical interconnector to improve the electrochemical performance of Si/SiO nanosphere anode materials for lithium ion batteries (LIBs). The resulting Si/SiO -PEDOT:PSS core-shell structured material with the small amount (1 wt %) of PEDOT:PSS shows the improved initial reversible capacity of 968.2 mA h g with excellent long-term cycle performance over 200 cycles. These promising properties can be attributed to the use of the electroconductive and flexible PEDOT:PSS shell layer, which protects the electrical conduction pathways in the electrode from the large volume changes of silicon during cycling.

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Electrochemical behaviors of nonstoichiometric silicon suboxides (SiOx) film prepared by reactive evaporation for lithium rechargeable batteries

Cited by 115 publications

References 24 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

Highly efficient and scalable synthesis of SiOx/C composite with core-shell nanostructure as high-performance anode material for lithium ion batteries

Si/SiO_x‐Conductive Polymer Core‐Shell Nanospheres with an Improved Conducting Path Preservation for Lithium‐Ion Battery

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Electrochemical behaviors of nonstoichiometric silicon suboxides (SiOx) film prepared by reactive evaporation for lithium rechargeable batteries

Cited by 115 publications

References 24 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

Highly efficient and scalable synthesis of SiOx/C composite with core-shell nanostructure as high-performance anode material for lithium ion batteries

Si/SiOx‐Conductive Polymer Core‐Shell Nanospheres with an Improved Conducting Path Preservation for Lithium‐Ion Battery

Contact Info

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

Si/SiO_x‐Conductive Polymer Core‐Shell Nanospheres with an Improved Conducting Path Preservation for Lithium‐Ion Battery