title: A microwave synthesis of mesoporous NiCo2O4 nanosheets as electrode materials for lithium-ion batteries and supercapacitors.
abstract: A facile microwave method was employed to synthesize NiCo2 O4 nanosheets as electrode materials for lithium-ion batteries and supercapacitors. The structure and morphology of the materials were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy and Brunauer-Emmett-Teller methods. Owing to the porous nanosheet structure, the NiCo2 O4 electrodes exhibited a high reversible capacity of 891 mA h g(-1) at a current density of 100 mA g(-1) , good rate capability and stable cycling performance. When used as electrode materials for supercapacitors, NiCo2 O4 nanosheets demonstrated a specific capacitance of 400 F g(-1) at a current density of 20 A g(-1) and superior cycling stability over 5000 cycles. The excellent electrochemical performance could be ascribed to the thin porous structure of the nanosheets, which provides a high specific surface area to increase the electrode-electrolyte contact area and facilitate rapid ion transport.
authors.affiliation: Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney Broadway, Sydney, NSW 2007 (Australia). Anjon.K.Mondal@student.uts.edu.au.
authors.forename: Anjon Kumar
authors.initials: AK
authors.lastname: Mondal
authors.forename: Dawei
authors.initials: D
authors.lastname: Su
authors.forename: Shuangqiang
authors.initials: S
authors.lastname: Chen
authors.forename: Katja
authors.initials: K
authors.lastname: Kretschmer
authors.forename: Xiuqiang
authors.initials: X
authors.lastname: Xie
authors.forename: Hyo-Jun
authors.initials: HJ
authors.lastname: Ahn
authors.forename: Guoxiu
authors.initials: G
authors.lastname: Wang
keywords: NiCo2O4 nanosheets; electrodes; lithium ion batteries; porous structure; supercapacitors