Characterization of sputtered vanadium oxide films for lithium batteries

Koike, Sachiko; Fujieda, Takuya; Sakai, Tetuo; Higuchi, Shunichi

doi:10.1016/s0378-7753(99)00223-2

Cited by 34 publications

(34 citation statements)

References 9 publications

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“…[5][6][7] Nanostructured forms of V2O5 have been employed in field-effect transistors (FETs), 8 sensors, 9-10 spintronic devices, 11 and nanolithography templates. [12][13] In the field of rechargeable lithium batteries, besides low cost and abundant source, it is argued that V2O5 is an attractive cathode material owing to its unique features such as high electrochemical activity, high energy density, and high rate cyclability towards lithium insertion. 14 Electrochemical reduction of V2O5 can occur in a large potential window between 4.0 to 1.5 V vs. Li/Li + , where approximately three moles of lithium per mole of V2O5 could be theoretically inserted, leading to a theoretical specific charge of approximately 442 mAh g −1 .…”

Section: Introductionmentioning

confidence: 99%

Flame spray-pyrolyzed vanadium oxide nanoparticles for lithium battery cathodes

Patey

Büchel

et al. 2009

Phys. Chem. Chem. Phys.

116

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Vanadium pentoxide (V2O5) nanoparticles (30-60 nm) were made by a one-step and scalable flame spray pyrolysis (FSP) process. Optimization of the FSP processing conditions (precursor concentration and injection rate) enhanced the electrochemical performance of these nanoparticles. Increasing the cut-off potential for discharging from 1.5 to 2.5 V vs. Li/Li + improved the cycle life of these V2O5 nanoparticles. Particles with the lowest specific surface area ( 32 m 2 g −1 ) and highest phase purity (up to 98 wt%) showed excellent cyclability between 2.5 and 4.0 V vs. Li/Li + , retaining a specific charge of 110 mAh g −1 beyond 100 cycles at a specific current of 100 mA g −1 , and also superior specific charge of 100 mAh g −1 at specific current up to 20C rate (or 2000 mA g −1 ).

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Section: Introductionmentioning

confidence: 99%

Flame spray-pyrolyzed vanadium oxide nanoparticles for lithium battery cathodes

Patey

Büchel

et al. 2009

Phys. Chem. Chem. Phys.

116

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“…Indeed, this material presents a layered structure, a high energy density [4,5] and a possibility to insert 3 Li per V 2 O 5 leading to an overall faradic capacity close to 420 Ah kg −1 [6]. Furthermore, various oxidation states for the vanadium exist and this material is easily prepared as a thin film using various methods such as CVD [7], PVD [8], spin-coating [9], etc.…”

Section: Introductionmentioning

confidence: 99%

Surface film morphology (AFM) and chemical features (XPS) of cycled V2O5 thin films in lithium microbatteries

Fleutot

Martínez

Pecquenard

et al. 2008

Journal of Power Sources

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a b s t r a c tSputtered vanadium pentoxide thin films have been used as positive electrode in lithium microbatteries and extensively studied after cycling over the 31st galvanostatic cycles by two complementary techniques, especially well-adapted for thin films analysis: X-ray photoelectron spectroscopy and atomic force microscopy. This study is mainly focussed on the characterization of the surface film (solid electrolyte interface-type) which is formed during subsequent discharges and charges and especially on its composition and its morphology that are changing during cycling. First, the growth of a surface layer between the positive electrode and the liquid electrolyte has been evidenced upon the discharge as well as its partial dissolution upon the charge. Secondly, the chemical and topographic changes of this interfacial layer at various stages of cycling are discussed in correlation with the evolution of the discharge capacity over cycles.

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“…Vanadium pentoxide (V 2 O 5 ) is an attractive cathode material in lithium-ion batteries because of its unique features such as high electrochemical activity, high energy density, and high stability towards lithium insertion [1]. The electro-reduction of V 2 O 5 can occur in a large potential window between 4.0 and 1.5 V versus Li/Li + , where ∼3 lithium/mole of V 2 O 5 could be theoretically inserted, leading to a theoretical capacity close to 400 mAh g −1 [2].…”

Section: Introductionmentioning

confidence: 99%