Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/168787
Title: THE METAL ORGANIC FRAMEWORK (MOF) DERIVED MANGANESE OXIDE/CARBON COMPOSITES AND THEIR SUPERCAPACITOR APPLICATION
Authors: WANG RUOYU
Keywords: Electrochemical energy storages, MOF-derived active materials, Manganese oxide, Manganese oxide/carbon nanocomposite, Thermolysis, Pseudocapacitance
Issue Date: 16-Jan-2020
Citation: WANG RUOYU (2020-01-16). THE METAL ORGANIC FRAMEWORK (MOF) DERIVED MANGANESE OXIDE/CARBON COMPOSITES AND THEIR SUPERCAPACITOR APPLICATION. ScholarBank@NUS Repository.
Abstract: Due to their potential in electrochemical energy storage, metal organic framework (MOF)-derived metal oxide/carbon composites have attracted extensive research interest. Here, MOF-calcinated MnO@C is subjected to air thermolysis to study the change in its chemical and physical properties. It is discovered that the MnO@C transforms into Mn3O4@C at 200 ℃, retaining high surface area and some carbon content of the MnO@C. On the contrary, thermolysis at higher temperatures results in manganese oxides with negligible carbon and greatly reduced surface area. Among all samples, Mn3O4@C heated for 2 hours (Mn3O4@C-2h) shows the highest capacitance. It is then combined with graphene oxide (GO) nanosheets to form a Mn3O4@C/rGO electrode, whose capacitance reaches 328.4 F cm-3. Finally, a Mn3O4@C/rGO-based asymmetric supercapacitor is fabricated. This work demonstrates that the properties of MOF-derived manganese oxide/carbon composite can be effectively modified through moderate air thermolysis and shows the potential of the Mn3O4@C as supercapacitor electrode material.
URI: https://scholarbank.nus.edu.sg/handle/10635/168787
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