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A new sodium iron phosphate as a stable high-rate cathode material for sodium ion batteries

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Nano Research 2018年第12期11卷 6197-6205页

作者： Xiaobo Zhu Takashi Mochiku Hiroki Fujii Kaibin Tang Yuxiang Hu Zhenguo Huang Bin Luo Kiyoshi ozawa Lianzhou Wang Nanomatefials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandQLD 4072Australia National lnstitute for Matefials Science 1-2-1SengenTsukuba-cityIbaraki 305-0047Japan Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry University of Science and Technology of ChinaHefei 230026China School of Civil and Environmental Engineering University of Technology SydneyNSW 2007Australia

Low-cost room-temperature sodium-ion batteries (SIBs) are expected to promote the development of stationary energy storage applications. However, due to the large size of Na+, most Na+ host structures resembling their Li+ counterparts show sluggish ion mobility and destructive volume changes during Na ion (de)intercalation, resulting in unsatisfactory rate and cycling performances. Herein, we report a new type of sodium iron phosphate (Na0.71Fe1.07PO4), which exhibits an extremely small volume change (~ 1%) during desodiation. When applied as a cathode material for SIBs, this new phosphate delivers a capacity of 78 mA·h·g−1 even at a high rate of 50 C and maintains its capacity over 5,000 cycles at 20 C. In situ synchrotron characterization disclosed a highly reversible solid-solution mechanism during charging/discharging. The findings are believed to contribute to the development of high-performance batteries based on Earth-abundant elements.

关键词： sodium iron phosphate low volume change cathode material long cycle rate performance sodium ion batteries

碳化镍钼催化剂的制备及其甲烷干气重整活性(英文)

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催化学报 2011年第5期32卷 771-776页

作者： Taro HIROSE Yasushi ozawa Masatoshi NAGAI Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology Energy Engineering Research Laboratory Central Research Institute of Electric Power Industry

Nickel molybdenum carbide catalysts were prepared and their activities in the CO2 reforming of methane at a low CO2/CH4 reactant ratio were investigated using a microreactor at atmospheric pressure and at 973 *** effect of the catalyst preparation method and the Ni/Mo ratio on the increase in catalyst life and the promotion of catalytic activity were investigated using N2 adsorption,X-ray diffraction, temperature-programmed carburization,temperature-programmed reaction,and a reforming *** 25Ni75Mo catalyst that was carburized at 813 K exhibited the highest hydrogen formation ability and gave the least carbon *** incomplete carburization of the Mo oxide species in the catalyst that was carburized at a lower temperature gradually gave a more active carburized *** NiMoOxCy in the catalyst was more active in hydrogen formation during the dry reforming of methane whileβ-Mo2C andη-Mo3C2 were less active.

关键词： catalyst activation catalyst selectivity fuel dry reforming methane

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Characteristic Properties of Advanced Coil-External Electrodes of Fluorescent Lamps

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Journal of Materials Science and Chemical Engineering 2018年第2期6卷 33-64页

作者： Lyuji ozawa Independent Scholar Beijing China

The coil-EEFL lamps, which are operated with DC driving circuit, have studied. The figure of the merit of the coil-EEFL lamps is the quantum efficiency (ηq) that is given by the emitted visible photons by one moving electron in the FL lamp. The electrons in the FL lamps move on in the superconductive vacuum (R = 0) in the positive column at above room temperature, giving rise to the astronomical ηq = 1013 visible photons (m3.s)-1. Miraculously, the developed coil-EEFL lamps in the parallel connections light up with WDC = 0, without the sacrifice of the illuminance (lm.m-2). Furthermore, the scraped 40 W-HCFL lamps revitalize to the coil-EEFL lamps, promising the operation life longer than 106 hours. The shallow gap between phosphor screen and positive column can be made by side by side arrangement of the low voltage CL phosphor particles and PL phosphor particles. The coil-EEFL lamps in parallel connections may contribute to the Green Energy Projects of UN.

关键词： Green Energy FL Lamps Power Consumption Operation Life Superconductive Vacuum

HCFL Lamp Only Lights Up under Coexistence of Cathode and Anode in Ar Gas Space for Half Cycle of AC Driving Circuit

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Journal of Power and Energy Engineering 2019年第2期7卷 1-13页

作者： Lyuji ozawa Beijing China

Vacuum space between Ar atoms in unlighted HCFL lamps is an electric insulator, because vacuum fills up with strong negative electric field from orbital electrons in 3p6 electron shell of Ar atoms. Vacuum space in lighted FL lamps changes to the neutral vacuum that provides a superconductive vacuum for moving electrons at above room temperature. The complications of lighting mechanisms of HCFL lamps for more than 80 years have clearly solved with coexistence of disparate external and internal electric circuits for each half cycle. External electric circuit acts as two roles. One helps for formation of internal electric circuit in Ar gas space by electric field. Other picks up induced voltages from capacitor CFL. HCFL lamp only lights up with moving electrons in internal DC driving circuit. Electrons in HCFL lamp only move from cathode to anode, which respectively have negative and positive potentials against grand (V = 0), and which are formed with volumes of heated corona light (4G) at around W-filament metal electrodes with a help of heated BaO particles. The HCFL lamp that emits thermoelectrons is a false story. Here we have totally revised the fundamentals of the lighting mechanism of the established HCFL lamps for last 80 years.

关键词： FL Lamp Cathode and Anode Superconductive Vacuum Operation Life

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铂基催化剂用于柴油烃氧化(英文)

催化学报 2011年第5期32卷 777-781页

作者： Masaaki HANEDA Motoi SASAKI Hideaki HAMADA Masakuni ozawa Ceramics Research Laboratory Nagoya Institute of Technology Research Center for New Fuels and Vehicle Technology National Institute of Advanced Industrial Science and Technology(AIST)

The catalytic performance of Pt-based catalysts for the total oxidation of hydrocarbons was *** activity of supported Pt catalysts(Pt/Al2O3,Pt/ZrO2,Pt/TiO2,and Pt/H-ZSM-5)depends on the metal oxide ***/Al2O3 showed the highest catalytic activity when the catalysts were aged at 750°C for 50 h in *** activity of Pt/Al2O3 was dependent on the valence state of the Pt ***/Al2O3 with the Pt surface in the metallic state was more active than with the surface in the cationic *** surface density of acid and basic sites on the Al2O3 support controlled the valence state of the Pt surface and stability of the Pt particles in the highly dispersed state,respectively.

关键词： diesel oxidation catalyst platinum alumina valence state of platinum surface surface acid-base property

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Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices

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Light(Science & Applications) 2020年第1期9卷 627-636页

作者： Omar Jamadi Elena Rozas Grazia Salerno Marijana Milicevic Tomoki ozawa Isabelle Sagnes Aristide Lemaitre Luc Le Gratiet Abdelmounaim Harouri Iacopo Carusotto Jacqueline Bloch Alberto Amo Universite de Lille CNRSUMR 8523—PhLAM—Physique des Lasers Atomes et Molecules59000 LilleFrance Depto.de Fisica de Materiales e Instituto Nicolas Cabrera Universidad Autonoma de Madrid(UAM)28049 MadridSpain Center for Nonlinear Phenomena and Complex Systems Universite Libre de BruxellesCP 231Campus PlaineB-1050 BrusselsBelgium Universite Paris-Saclay CNRSCentre de Nanosciences et de Nanotechnologies91120 PalaiseauFrance Interdisciplinary Theoretical and Mathematical Sciences Program(iTHEMS) RIKENWakoSaitama 351-0198Japan INO-CNR BEC Center and Dipartimento di Fisica Universita di Trento38123 PovoItaly

We report the realization of a synthetic magnetic field for photons and polaritons in a honeycomb lattice of coupled semiconductor micropillars.A strong synthetic field is induced in both the s and p orbital bands by engineering a uniaxial hopping gradient in the lattice,giving rise to the formation of Landau levels at the Dirac *** provide direct evidence of the sublattice symmetry breaking of the lowest-order Landau level wavefunction,a distinctive feature of synthetic magnetic *** realization implements helical edge states in the gap between n=0 and n=±1 Landau levels,experimentally demonstrating a novel way of engineering propagating edge states in photonic *** light of recent advances in the enhancement of polariton–polariton nonlinearities,the Landau levels reported here are promising for the study of the interplay between pseudomagnetism and interactions in a photonic system.

关键词： Landau helical realization

Experimental measurement of the quantum geometric tensor using coupled qubits in diamond

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National Science Review 2020年第2期7卷 254-260页

作者： Min Yu Pengcheng Yang Musang Gong Qingyun Cao Qiuyu Lu Haibin Liu Shaoliang Zhang Martin B.Plenio Fedor Jelezko Tomoki ozawa Nathan Goldman Jianming Cai School of Physics Huazhong University of Science and Technology International Joint Laboratory on Quantum Sensing and Quantum Metrology Huazhong University of Science and Technology Institut für Quantenoptik & IQST Albert-Einstein Allee 11Universit?t Ulm Institut für Theoretische Physik & IQST Albert-Einstein Allee 11Universit?t Ulm Interdisciplinary Theoretical and Mathematical Sciences Program(iTHEMS) 6. Center for Nonlinear Phenomena and Complex Systems Université Libre de Bruxelles

Geometry and topology are fundamental concepts, which underlie a wide range of fascinating physical phenomena such as topological states of matter and topological defects. In quantum mechanics, the geometry of quantum states is fully captured by the quantum geometric tensor. Using a qubit formed by an NV center in diamond, we perform the first experimental measurement of the complete quantum geometric tensor. Our approach builds on a strong connection between coherent Rabi oscillations upon parametric modulations and the quantum geometry of the underlying states. We then apply our method to a system of two interacting qubits, by exploiting the coupling between the NV center spin and a neighboring13C nuclear spin. Our results establish coherent dynamical responses as a versatile probe for quantum geometry,and they pave the way for the detection of novel topological phenomena in solid state.

关键词： quantum geometry topological physics quantum measurement quantum control quantum information

Mechanism of E-cadherin-mediated cell adhesion: analysis using K562 leukemia cells as a model system

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Mechanism of E-cadherin-mediated cell adhesion: analysis usi...

Reaction cross sections of unstable nuclei

Third Congress of the Asian-Pacific Organization for Cell Biology

作者： Masayuki ozawa Department of BiochemistryFaculty of Medicine.Kagoshima UniversityKagoshima 890-8520Japan

Cadherins comprise a family of Ca2+-dependent transmembrane molecules that play essential roles in the initiation and stabilization of cell-cell contacts. The extracellular domain of cadherins is responsible for specific homophilic binding, and the conserved cytoplasmic domain facilitates adhesion through binding to intracellular proteins,

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Reaction cross sections of unstable nuclei