Understanding the redox process upon electrochemical cycling of the P2-Na0.78Co1/2Mn1/3Ni1/6O2 electrode material for sodium-ion batteries
Copyright policy )Understanding the redox process upon electrochemical cycling of the P2-Na0.78Co1/2Mn1/3Ni1/6O2 electrode material for sodium-ion batteries
AbstractRechargeable sodium-ion batteries have recently attracted renewed interest as an alternative to Li-ion batteries for electric energy storage applications, because of the low cost and wide availability of sodium resources. Thus, the electrochemical energy storage community has been devoting increased attention to designing new cathode materials for sodium-ion batteries. Here we investigate P2- Na0.78Co1/2Mn1/3Ni1/6O2 as a cathode material for sodium ion batteries. The main focus is to understand the mechanism of the electrochemical performance of this material, especially differences observed in redox reactions at high potentials. Between 4.2 V and 4.5 V, the material delivers a reversible capacity which is studied in detail using advanced analytical techniques. In situ X-ray diffraction reveals the reversibility of the P2-type structure of the material. Combined soft X-ray absorption spectroscopy and resonant inelastic X-ray scattering demonstrates that Na deintercalation at high voltages is charge compensated by formation of localized electron holes on oxygen atoms.
- Cadi Ayyad University Morocco
- Polytechnic University Japan
- Polytechnic University Japan
- Université Mohammed VI Polytechnique Morocco
- Mohammed V University Morocco
Energy storage, Electrode, Materials Science, Materialkemi, Organic chemistry, Article, Redox, Engineering, Chemical engineering, Materials for Electrochemical Supercapacitors, Materials Chemistry, FOS: Electrical engineering, electronic engineering, information engineering, Electrochemistry, Cathode Materials, Electrical and Electronic Engineering, Ion, Lithium Battery Technologies, Anode Materials, Rechargeable Batteries, FOS: Chemical engineering, Physics, Sodium, Power (physics), Electrode Materials, Materials science, Electronic, Optical and Magnetic Materials, Chemistry, Physical chemistry, Lithium-ion Battery Technology, Physical Sciences, Metallurgy, Cathode, Thermodynamics, Battery Materials, Inorganic chemistry
Energy storage, Electrode, Materials Science, Materialkemi, Organic chemistry, Article, Redox, Engineering, Chemical engineering, Materials for Electrochemical Supercapacitors, Materials Chemistry, FOS: Electrical engineering, electronic engineering, information engineering, Electrochemistry, Cathode Materials, Electrical and Electronic Engineering, Ion, Lithium Battery Technologies, Anode Materials, Rechargeable Batteries, FOS: Chemical engineering, Physics, Sodium, Power (physics), Electrode Materials, Materials science, Electronic, Optical and Magnetic Materials, Chemistry, Physical chemistry, Lithium-ion Battery Technology, Physical Sciences, Metallurgy, Cathode, Thermodynamics, Battery Materials, Inorganic chemistry
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