Structural, Electronic, and Electrochemical Properties of Li

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概要

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• Prussian blue analogues with jungle-gym-type structure are promising candidates for cathode materials of the lithium-ion secondary battery (LIB). Here, we investigated the structural, electronic, and electrochemical properties of cobalt hexacyanoferrate, Li<inf>x</inf>Co[Fe(CN)<inf>6</inf>]<inf>0.90</inf>2.9H<inf>2</inf>O, against Li concentration (x). The capacity (= 139 mAh/g) of the thin-film electrode was close to the ideal value (= 132 mAh/g) for the two-electron reaction. The discharge curve exhibits three plateaus, i.e., plateaus I, II, and III. The material exhibits a first-order phase transition accompanied by significant volume expansion by 7% at the boundary between plateaus II and III. Ex situ X-ray absorption spectroscopy (XAS) indicates that the discharge processes of plateaus I, II, and III are ascribed to the reduction processes of Fe³⁺, Co³⁺, and Fe³⁺, respectively. The rate (r) and cycle (n) dependence of the electrode performance will be discussed in terms of the reduction processes.

• 2013-04-25

著者

• Moritomo Yutaka

  Graduate School Of Pure And Applied Science University Of Tsukuba

• Matsuda Tomoyuki

  Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

• Moritomo Yutaka

  Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

• Takachi Masamitsu

  Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan

• MATSUDA Tomoyuki

  Graduate School of Pure and Applied Science, University of Tsukuba

関連論文

• Thin Film Electrode of Prussian Blue Analogue for Li-ion Battery
• Oxidization Process of Fe--Ni Mixed Prussian Blue Analogue Investigated by Valence-Differential Spectroscopy
• Size Dependent Cation Channel in Nanoporous Prussian Blue Lattice
• Doping-Induced Structural Phase Transition in Na_Co[Fe(CN)_6]_2.9H_2O
• Cubic-Rhombohedral Structural Phase Transition in Na1.32Mn[Fe(CN)6]0.83\Cdot3.6H2O
• High-Pressure Raman Spectroscopy of Transition Metal Cyanides
• Lattice-Mediated Propagation of Photoinduced Phase Transition in Co--Fe Cyanide
• Oxidization/Reduction Process of Prussian Blue Film as Investigated by Valence-Differential Spectroscopy
• Crystallization Process of Photoexcited High-Spin Sites in Co--Fe Cyanide Film
• Thermal Rectification in the Vicinity of a Structural Phase Transition
• Charge-Transfer State and Charge Dynamics in Poly(9,9'-dioctylfluorene-co-bithiophene) and [6,6]-Phenyl C_-butyric Acid Methyl Ester Blend Film
• Thin Film Electrodes of Prussian Blue Analogues with Rapid Li^+ Intercalation
• Interface Dependence of Charge Formation Dynamics in Hexabenzocoronene-C_
• Structural Phase Diagram of Mn--Fe Cyanide against Cation Concentration
• Cation Extraction Process in Bilayer Cyanide Film as Investigated by Depth-Resolved X-ray Absorption Spectroscopy
• Fast Carrier Formation from Acceptor Exciton in Low-Gap Organic Photovotalic
• Structural Properties of Manganese Hexacyanoferrates against Li Concentration
• Simultaneous Measurement of Electron and Ion Transfer in All-Solid Ion-Transfer Device Made of Transition Metal Cyanide Films
• Doping-Induced Structural Phase Transition in Na1.6-xCo[Fe(CN)6]0.902.9H2O
• Electronic Structure of Hole-Doped Transition Metal Cyanides
• Structural, Electronic, and Electrochemical Properties of Li
• Structural Response of P2-Type Na
• Fabrication of Epitaxial Interface between Transition Metal Cyanides
• Electronic State of P2-Type Na
• Pressure-Induced Phase Transition in Zn–Fe Prussian Blue Lattice
• Electronic State of P2-Type Na[x]MO₂ (M = Mn and Co) as Investigated by In situ X-ray Absorption Spectroscopy
• Cobalt Hexacyanoferrate as Cathode Material for Na^+ Secondary Battery
• Molecular mixing in donor and acceptor domains as investigated by scanning transmission X-ray microscopy

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