Chemistry - A European Journal · 2020 · 31 citations · 62 references
Natural SciencesMaterials EngineeringMaterials ScienceInorganic ChemistryMaterials ChemistryNanomaterialsAnode MaterialsBattery MaterialsElectrode MaterialsMetal Oxide NanomaterialsMetal OxidesNanomaterials For Energy StorageCalcinationElectronic ConductivityFerritesLithium-ion Battery Anode MaterialsOxygen VacanciesOxygen Vacancies In Metal OxidesTransition Metal Oxide AnodesTransition Metal Oxides
Abstract Transition metal oxides, as one of the most promising anode materials for lithium‐ion batteries, often suffer from poor electronic conductivity and serious structural collapse. In this work, oxygen‐vacancy‐abundant CoFe 2 O 4 and NiFe 2 O 4 deposited on N‐doped carbon nanosheets are designed and fabricated through a calcination procedure and a solvothermal strategy using Zn‐hexamine coordination frameworks as precursors. The as‐prepared NC@CoFe 2 O 4 and NC@NiFe 2 O 4 hybrids display improved cycle performances and rate capacities compared with CoFe 2 O 4 , NiFe 2 O 4 , and Fe 2 O 3 . The enhanced lithium storage performances of NC@CoFe 2 O 4 and NC@NiFe 2 O 4 are attributed to the oxygen vacancies and conductive N‐doped carbon nanosheets, which increase the electronic conductivity and electrochemical reaction kinetics. The synthetic process in this work provides a new perspective for designing other high‐performance transition metal oxide anodes.
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