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Browsing Makale Koleksiyonu by Author "Seyma Ozcan"

Browsing Makale Koleksiyonu by Author "Seyma Ozcan"

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  • A high-performance composite positive electrode based on graphene and Li (Ni1/3Co1/3Mn1/3)O-2 
    Aslihan Guler; Hatice Gungor; Seyma Ozcan; Çoban, Aslan; Güler, Mehmet Oğuz; Akbulut, Hatem (WILEY, 2018)
    The cathode electrodes in commercial Li-ion cells are usually coated on aluminum foils, while the anode part is coated on copper current collector. However, these metallic foils of the electrodes are relatively heavy ...
  • A high-performance composite positive electrode based on graphene and Li (Ni1/3Co1/3Mn1/3)O-2 
    Aslihan Guler; Hatice Gungor; Seyma Ozcan; Çoban, Aslan; Güler, Mehmet Oğuz; Akbulut, Hatem (WILEY, 2018)
    The cathode electrodes in commercial Li-ion cells are usually coated on aluminum foils, while the anode part is coated on copper current collector. However, these metallic foils of the electrodes are relatively heavy ...
  • Free standing flexible graphene oxide plus alpha-MnO2 composite cathodes for Li-Air batteries 
    Seyma Ozcan; Tokur, Mahmud; Çetinkaya, Tuğrul; Aslihan Guler; Uysal, Mehmet; Güler, Mehmet Oğuz; Akbulut, Hatem (ELSEVIER SCIENCE BV, 2016)
    The most important factor regarding to influence the electrochemical performance of lithium-air battery is to choose an effective catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this ...
  • Freestanding graphene/MnO2 cathodes for Li-ion batteries 
    Seyma Ozcan; Aslihan Guler; Çetinkaya, Tuğrul; Güler, Mehmet Oğuz; Akbulut, Hatem (BEILSTEIN-INSTITUT, 2017)
    Different polymorphs of MnO2 (alpha-, beta-, and gamma-) were produced by microwave hydrothermal synthesis, and graphene oxide (GO) nanosheets were prepared by oxidation of graphite using a modified Hummers' method. ...
  • Graphene supported alpha-MnO2 nanocomposite cathodes for lithium ion batteries 
    Çetinkaya, Tuğrul; Tokur, Mahmud; Seyma Ozcan; Uysal, Mehmet; Akbulut, Hatem (PERGAMON-ELSEVIER SCIENCE LTD, 2016)
    In this study, Graphene/alpha-MnO2 nanocomposite cathodes were produced using ultra-sonication and mechanical alloying facilities. Before production of Graphene/alpha-MnO2 composites, Graphene structure was fabricated by ...
  • High capacity Graphene/alpha-MnO2 nanocomposite cathodes for Li-O-2 batteries 
    Çetinkaya, Tuğrul; Akbulut, Hatem; Tokur, Mahmud; Seyma Ozcan; Uysal, Mehmet (PERGAMON-ELSEVIER SCIENCE LTD, 2016)
    Graphene/alpha-MnO2 nanocomposite cathodes containing various amount of alpha-MnO2 catalysts (10 wt.%, 30 wt.%, 50 wt.%) were produced using planetary ball milling. The charge-discharge characteristics of the Li-O-2 cells ...
  • Novel Ag/Li4Ti5O12 binary composite anode electrodes for high capacity Li-ion batteries 
    Aslihan Erdas; Seyma Ozcan; Deniz Nalci; Güler, Mehmet Oğuz; Akbulut, Hatem (ELSEVIER SCIENCE SA, 2015)
    In this study, spinel lithium titanates, Li4Ti5O12, have been synthesized by a simple sol-gel method. Surfaces of assynthesized Li4Ti5O12 powders were then coated with silver. Electrochemical results exhibit that Ag/Li4Ti5O12 ...
  • Stability effect of polymer-based additives on EMITFSI-LiTFSI electrolyte in lithium-air battery 
    Tokur, Mahmud; Algül, Hasan; Seyma Ozcan; Çetinkaya, Tuğrul; Uysal, Mehmet; Güler, Mehmet Oğuz; Akbulut, Hatem (ELSEVIER, 2016)
    Electrolytes with polymer additives are reported as promising electrolyte systems that poses many advantages over nonaqueous ionic liquid-based electrolytes in terms of electrochemical stability. In this study, novel ...
  • Synthesis of flexible pure graphene papers and utilization as free standing cathodes for lithium-air batteries 
    Seyma Ozcan; Çetinkaya, Tuğrul; Tokur, Mahmud; Algül, Hasan; Güler, Mehmet Oğuz; Akbulut, Hatem (PERGAMON-ELSEVIER SCIENCE LTD, 2016)
    In Lithium-air cathode, graphene containing materials have been reported as ideal cathode materials due to their large theoretical specific surface area, chemical stability, high electrical conductivity and charge capacity. ...