Synthesis and electrochemical properties of lithium molybdenum oxides

Kobayashi, Hironori; Tabuchi, Mitsuharu; Shikano, Masahiro; Nishimura, Yasuo; Kageyama, Hiroyuki; Ishida, Tadashi; Nakamura, Hideo; Kurioka, Yutaka; Kanno, Ryoji

doi:10.1016/s0378-7753(98)00227-4

Cited by 28 publications

(27 citation statements)

References 16 publications

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“…observed in this study was also previously documented. [9] [11] [26] [27] Suggestions for the cause of this irreversibility include structural change, Mo ion migration, and decomposition of H 2 0. [9] [26] In the crystalline sample (C), the activation effect of the peak at 2.75V is indicative of a structural change.…”

Section: Discussionmentioning

confidence: 99%

Structural and electrochemical properties of amorphous and crystalline molybdenum oxide aerogels

2001

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Section: Discussionmentioning

confidence: 99%

Structural and electrochemical properties of amorphous and crystalline molybdenum oxide aerogels

2001

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“…Of these metal components, it has been reported that the Ru 51/41 , Mo 51/41 , and Pt 51/41 couples permit lithium extraction from the host structure. [12][13][14][15][17][18][19][20][21] Recently, we reported changes in the structural and physical properties on de-lithiation and the electrochemical behavior of Li 2 MO 3 (M ~Ru, Ir, and Mo) and Li 1.8 Ru 0.6 Fe 0.6 O 3 . [17][18][19][20]22 In the Li 2 RuO 3 system, structural change from monoclinic to hexagonal symmetry was observed on de-lithiation, but the Li/Li 2 RuO 3 cells showed excellent reversibility in the voltage range of 3.0-4.0 V with a capacity of 160 mA h g 21 .…”

Section: Introductionmentioning

confidence: 99%

Structure, and magnetic and electrochemical properties of layered oxides, Li2IrO3

et al. 2003

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“…[27][28][29][30] Recent studies have indicated that one-dimensional and nanostructured active materials can be very effective to improve electrochemical properties such as specific discharge capacity, cycling performance, and rate capability for use in rechargeable lithium batteries. 10,31,32 Besides the structural modifications, it was also reported that binary systems could improve the structural stability, electronic conductivity, and/or Li + ion diffusion coefficient of the electrode materials, which are largely composed of metal-metal, metal-oxide, and oxide-oxide systems such as Sn-Si, 18 metal ͑Cu 20 and Ag 21 ͒-and oxide ͑MoO 3 19 ͒-doped V 2 O 5 , alloy of Si-Zr, 22 and composite of SnO 2 -RuO 2 .…”

Section: Resultsmentioning

confidence: 99%

Pt-Embedded MoO[sub 3] Electrodes for Rechargeable Lithium Batteries

Kim

Ahn

Shim

et al. 2007

Electrochem. Solid-State Lett.

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Effects of Pt nanoparticle incorporation into a MoO 3 thin film, which was prepared via cosputtering of a Pt and MoO 3 target, were investigated for a cathode electrode of the rechargeable Li batteries. The incorporation of the Pt with size of ca. 1.5 nm formed a heterogeneous film morphology with nanophases of Pt and MoO 3 domains, leading to a better cyclic performance than the electrode of MoO 3 without Pt. These enhancements with Pt in the MoO 3 electrode could be ascribed to a combined effect of substantial decrease in the sheet resistance and amelioration of the mechanical stability of the film itself.High-performance rechargeable lithium batteries have been of great interest for power sources of various portable electronic devices, such as mobile phones, camcorders, and notebook computers. 1 Thin-film rechargeable lithium batteries with high energy density and excellent cycling performance have also been attractive for the miniaturized power sources in smaller sized electronic devices and microelectronic mechanical systems ͑MEMS͒. [2][3][4][5] Molybdenum trioxide ͑MoO 3 ͒, which has a two-dimensional layer structure, is one of the interesting materials due to its chemical and electrochemical properties; it has been widely investigated as the electrode materials for lithium-ion batteries, 6-10 electrochromic devices, 11 supercapacitors, 12 gas sensors, 13 and catalysts. 14 However, low recharge efficiency and poor cycling performance limit the successful application of MoO 3 as a cathode material for rechargeable Li batteries.MoO 3 thin films have been prepared using various thin film growth techniques such as chemical vapor deposition ͑CVD͒, vacuum evaporation, electrochemical deposition, or sputtering method. [15][16][17] Sputtering technique provides a simple and efficient method of thin-film growth both for an undoped single-and for doped multicomponents to improve the electrochemical properties. [18][19][20][21] It was reported that a nanocomposite electrode prepared by cosputtering of Si and Sn exhibited better reversible capacity during Li insertion and extraction processes than Si alone by enhancing structural stability of the electrodes. 18 Also, cycling performance and discharge capacity could be improved by incorporating a transition metal oxide of MoO 3 on an amorphous V 2 O 5 oxide, compared to those of V 2 O 5 alone. 19 Cosputtering of vanadium with Ag affected the discharge capacity and cycling performance of V 2 O 5 from modification of the electronic property and microstructure of V 2 O 5 material. 22 In this work, we investigate the microstructure, chemical environment, and electrochemical behavior of a nanocomposite electrode composed of MoO 3 and Pt as the cathode materials for a rechargeable Li battery, in which Pt nanoparticles are embedded in the MoO 3 thin-film matrix. Transmission electron microscopy ͑TEM͒, scanning electron microscopy ͑SEM͒, X-ray photoelectron spectroscopy ͑XPS͒, X-ray absorption near-edge structure ͑XANES͒, and Hall measurement were employed to characterize the p...

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Synthesis and electrochemical properties of lithium molybdenum oxides

Cited by 28 publications

References 16 publications

Structural and electrochemical properties of amorphous and crystalline molybdenum oxide aerogels

Structural and electrochemical properties of amorphous and crystalline molybdenum oxide aerogels

Structure, and magnetic and electrochemical properties of layered oxides, Li2IrO3

Pt-Embedded MoO[sub 3] Electrodes for Rechargeable Lithium Batteries

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