Angewandte Chemie International Edition · 2018 · 160 citations · 45 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryInorganic ChemistryMaterials ChemistryBattery MaterialsCathode MaterialsElectrochemical Energy StorageElectrode MaterialsEnergy Storage MaterialsRedox-active MaterialsCathode Active MaterialsElectrochemical StabilityIn Situ X-ray DiffractionSodium-ion BatteriesSodium-ion Battery MaterialsSodium-ion CathodesSynchrotron DiffractionSynchrotron X-ray Diffraction
Abstract Low‐cost layered oxides free of Ni and Co are considered to be the most promising cathode materials for future sodium‐ion batteries. Biphasic Na 0.78 Cu 0.27 Zn 0.06 Mn 0.67 O 2 obtained via superficial atomic‐scale P3 intergrowth with P2 phase induced by Zn doping, consisting of inexpensive transition metals, is a promising cathode for sodium‐ion batteries. The P3 phase as a covering layer in this composite shows not only in excellent electrochemical performance but also its tolerance to moisture. The results indicate that partial Zn substitutes can effectively control biphase formation for improving the structural/electrochemical stability as well as the ionic diffusion coefficient. Based on in situ synchrotron X‐ray diffraction coupled with electron‐energy‐loss spectroscopy, a possible Cu 2+/3+ redox reaction mechanism has now been revealed.
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Opportunities and challenges for a sustainable energy future
Steven Chu, Arun Majumdar · Nature · 2012 · 12.2K citations
Engineering, Environmental Engineering, Renewable Energy Systems +11
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Natural Sciences, Materials Engineering, Materials Science +17