Journal of The Electrochemical Society · 2014 · 76 citations · 27 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryEnergy MaterialsMaterials ChemistryBattery Cell ChemistryBattery MaterialsElectrochemical CellsElectrochemical Energy StorageElectrode MaterialsElectrode PotentialsCo-precipitationCo-precipitation SynthesisRate CapabilitySodium-ion BatteriesSodium-ion Battery AnodesSodium-ion Battery ElectrodesSodium-ion Battery MaterialsSpecific Capacity
Sodium layered oxide, Na0.70Mn0.60Ni0.30Co0.10O2, with a P2-type structure was synthesized by a co-precipitation method and characterized as positive electrode of sodium batteries. The P2-NaxMn0.60Ni0.30Co0.10O2 electrode delivered a high specific capacity of 185 mAh/g in the 1.5–4.3 V range at 1st cycle at C/20 rate; however, rapid capacity decay is observed. In the 1.7–4.0 V range the capacity is equal to 125 mAh/g with a fading considerably reduced. The rate capability is reasonably good. According to the electrochemical profile, a potential plateau around 4.2 V vs. Na+/Na, meaning a bi-phasic domain, and several voltage drops that could be related to single phase domains in a narrow sodium content range are observed. Even if the capacity decreases when the battery is cycled above 4.0 V, there is no irreversible structural change.
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Michael Slater, Donghan Kim, Eungje Lee et al. · Advanced Functional Materials · 2012 · 4.5K citations
Natural Sciences, Materials Engineering, Materials Science +17
Structural classification and properties of the layered oxides
Claude Delmas, C. Fouassier, Pascal Hagenmuller · Physica B+C · 1980 · 1.7K citations