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Author

Toru Yamashita

Other affiliations: Tokyo Institute of Technology
Bio: Toru Yamashita is an academic researcher from University of Queensland. The author has contributed to research in topics: X-ray photoelectron spectroscopy & Oxide. The author has an hindex of 4, co-authored 5 publications receiving 3488 citations. Previous affiliations of Toru Yamashita include Tokyo Institute of Technology.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the XPS spectra of the standard samples of 2FeO·SiO2 and Fe2O3, respectively.

4,434 citations

Journal ArticleDOI
TL;DR: In this article, the XPS peaks of Fe 3p for Fe2+ and Fe3+ in FeO and Fe2O3, respectively, have been measured and the effects of curve fitting parameters on interpretation of the data have been analyzed.

82 citations

Journal ArticleDOI
TL;DR: The main purpose of writing the paper was to demonstrate the extent to which the selection of input parameters for curve fitting can affect the results of the quantitative analysis, and to use this analysis to develop more consistent, reproducible and quantitative methods of analysis of these data.

12 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the peak positions and peak shape parameters of Fe 3p for Fe2+ and Fe3+ were derived from the XPS spectra of the standard samples of 2FeO·SiO2 and Fe2O3, respectively.

4,434 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a review of the status quo of X-ray photoelectron spectroscopy with a historical perspective, provide the technique's operating principles, resolve myths associated with C 1s referencing, and offer a comprehensive account of recent findings.

1,108 citations

Journal ArticleDOI
TL;DR: A low-cost high-performance solid-state flexible asymmetric supercapacitor with α-MnO2 nanowires and amorphous Fe2O3 nanotubes grown on flexible carbon fabric is first designed and fabricated.
Abstract: A low-cost high-performance solid-state flexible asymmetric supercapacitor (ASC) with α-MnO2 nanowires and amorphous Fe2O3 nanotubes grown on flexible carbon fabric is first designed and fabricated. The assembled novel flexible ASC device with an extended operating voltage window of 1.6 V exhibits excellent performance such as a high energy density of 0.55 mWh/cm3 and good rate capability. The ASC devices can find numerous applications as effective power sources, such as powering color-switchable sun glasses and smart windows.

995 citations

Journal ArticleDOI
TL;DR: A bottom-up strategy assisted by atomic layer deposition to graft bicontinuous mesoporous nanostructure Fe3O4 onto three-dimensional graphene foams and directly use the composite as the lithium ion battery anode, which exhibits high reversible capacity and fast charging and discharging capability.
Abstract: Fe3O4 has long been regarded as a promising anode material for lithium ion battery due to its high theoretical capacity, earth abundance, low cost, and nontoxic properties. However, up to now no effective and scalable method has been realized to overcome the bottleneck of poor cyclability and low rate capability. In this article, we report a bottom-up strategy assisted by atomic layer deposition to graft bicontinuous mesoporous nanostructure Fe3O4 onto three-dimensional graphene foams and directly use the composite as the lithium ion battery anode. This electrode exhibits high reversible capacity and fast charging and discharging capability. A high capacity of 785 mAh/g is achieved at 1C rate and is maintained without decay up to 500 cycles. Moreover, the rate of up to 60C is also demonstrated, rendering a fast discharge potential. To our knowledge, this is the best reported rate performance for Fe3O4 in lithium ion battery to date.

727 citations

Journal ArticleDOI
TL;DR: In this article, α-Fe2O3 hollow microspheres were synthesized using carbonaceous microsphere sacrificial templates and utilized for high capacity anode materials in lithium ion batteries (LIBs).
Abstract: Multi-shelled α-Fe2O3 hollow microspheres were synthesized using carbonaceous microsphere sacrificial templates and utilized for high capacity anode materials in lithium ion batteries (LIBs). Structural aspects including the shell thickness, number of internal multi-shells, and shell porosity were controlled by synthesis parameters to produce hollow microspheres with maximum lithium capacity and stable cycling behavior. Thin, porous, hollow microspheres with three concentric multi-shells showed the best cycling performance, demonstrating excellent stability and a reversible capacity of up to 1702 mA h g−1 at a current density of 50 mA g−1. The electrode performance is attributed to the large specific surface area and enhanced volumetric capacity of the multi-shelled hollow spheres that provide maximum lithium storage, while the porous thin shells facilitate rapid electrochemical kinetics and buffer mechanical stresses that accompany volume changes during de/lithiation.

601 citations