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Browsing Fakülteler / Faculties by Author "Çetinkaya, Tuğrul"

Now showing items 1-20 of 38

2H-MoS(2)as an Artificial Solid Electrolyte Interface in All-Solid-State Lithium-Sulfur Batteries

Kızılaslan, Abdulkadir; Çetinkaya, Tuğrul; Akbulut, Hatem (WILEY, 2020)

All-solid-state lithium-ion batteries are considered the next-generation energy storage systems. However, certain problems arise from the degradation of anode-electrolyte interface hindering their use especially when lithium ...
A different method for producing a flexible LiMn2O4/MWCNT composite electrode for lithium ion batteries

Çetinkaya, Tuğrul; Akbulut Uludağ, Ahsen; Güler, Mehmet Oğuz; Akbulut, Hatem (VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS, 2014)

A flexible lithium manganese oxide (LiMn2O4)/multi-wall carbon nanotube (MWCNT) composite electrode was produced by casting a slurry-containing powdered LiMn2O4 on a previously prepared MWCNT paper. The structure of this ...
Active and inactive buffering effect on the electrochemical behavior of Sn-Ni/MWCNT composite anodes prepared by pulse electrodeposition for lithium-ion batteries

Uysal, Mehmet; Çetinkaya, Tuğrul; Alp, Ahmet; Akbulut, Hatem (ELSEVIER SCIENCE SA, 2015)

Cycling stability of pure tin electrodes was aimed to improve by using suitable combination of nickel and multiwalled carbon nanotubes (MWCNTs). Nanocrystalline Sn-Ni/MWCNT composite was prepared by ultrasonic-pulse ...
Closing to Scaling-Up High Reversible Si/rGO Nanocomposite Anodes for Lithium Ion Batteries

Tokur, Mahmud; Algül, Hasan; Özcan, Serdar; Çetinkaya, Tuğrul; Uysal, Mehmet; Akbulut, Hatem (PERGAMON-ELSEVIER SCIENCE LTD, 2016)

In spite of its excellent discharge capacity, low conductivity and poor cycling stability prevent to commercialize silicon negative electrodes for the Lithium ion batteries (LIBs). Since graphene has large surface area, ...
Co-deposition of Cu/WC/graphene hybrid nanocomposites produced by electrophoretic deposition

Akbulut, Hatem; Hatipoğlu, Gizem; Algül, Hasan; Tokur, Mahmud; Kartal, Muhammet; Uysal, Mehmet; Çetinkaya, Tuğrul (ELSEVIER SCIENCE SA, 2015)

The effects of two different reinforcements of WC and graphene on the structural and tribological properties of copper matrix were investigated. Cu/WC, Cu/graphene and hybrid Cu/WC/graphene nanocomposites were co-deposited ...
Cr and V Substitution in the LiMn(2)O(4)Spinel Positive Electrode Li-Ion Batteries

A. Akbulut; Çetinkaya, Tuğrul; M. O. Guler; Uysal, Mehmet; Akbulut, Hatem (POLISH ACAD SCIENCES INST PHYSICS, 2015)

In this study, LiCr0.2V0.4Mn1.4O4 cathode active electrode materials were produced via a facile sol-gel method at 800 degrees C. The surfaces of the LiCr0.2V0.4Mn1.4O4 cathode active electrode materials were then coated ...
Double Buffering Effect on the Electrochemical Behavior of Pulse Electro co-deposited Sn-Ni/MWCNT Nanocomposite Electrodes for Lithium-ion Batteries

Uysal, Mehmet; Çetinkaya, Tuğrul; Harun Gul; Alp, Ahmet; Akbulut, Hatem (ELSEVIER, 2015)

Tin-Nickel/multiwalled carbon nanotube (MWCNT) composite plating was performed using a pyrophosphate bath. To reduce irreversible capacity and improve cycle performance of tin electrodes, Sn-Ni/MWCNT nanocomposite electrodes ...
Electrical double layer supercapacitors based on graphene nanoplatelets electrodes in organic and aqueous electrolytes: Effect of binders and scalable performance

Çetinkaya, Tuğrul; Robert A. W. Dryfe (ELSEVIER SCIENCE BV, 2018)

The effect of some commercial binders, carboxymethyl cellulose, polyvinylidene fluoride, modified styrene butadiene copolymer and vinylidene fluoride-hexafluoropropene copolymer on the capacitive performance of symmetric ...
Electrical double layer supercapacitors based on graphene nanoplatelets electrodes in organic and aqueous electrolytes: Effect of binders and scalable performance

Çetinkaya, Tuğrul; Robert A. W. Dryfe (ELSEVIER SCIENCE BV, 2018)

The effect of some commercial binders, carboxymethyl cellulose, polyvinylidene fluoride, modified styrene butadiene copolymer and vinylidene fluoride-hexafluoropropene copolymer on the capacitive performance of symmetric ...
Electrochemical performance of Al-Ni/MWCNTs nanocomposite anode for Li-ion batteries: the effect of MWCNT amount

Algül, Hasan; Tokur, Mahmud; Uysal, Mehmet; Çetinkaya, Tuğrul; Akbulut, Hatem; Alp, Ahmet (SPRINGER, 2016)

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Electrochemical performance of electroless nickel plated silicon electrodes for Li-ion batteries

Çetinkaya, Tuğrul; Uysal, Mehmet; Akbulut, Hatem (ELSEVIER SCIENCE BV, 2015)

In this study, nickel plated silicon powders were produced using an electroless deposition process. The nickel content on the surface of silicon powders was changed by using different concentrations of NiCl2 in the plating ...
Electrolytic coating of Sn nano-rods on nickel foam support for high performance lithium ion battery anodes

Tokur, Mahmud; Algül, Hasan; Uysal, Mehmet; Çetinkaya, Tuğrul; Alp, Ahmet; Akbulut, Hatem (ELSEVIER SCIENCE SA, 2016)

In this study, Sn was electrodeposited onto the porous nickel foam substrate under pulse electrodeposition conditions. Pulse electrodeposition was carried out at three different peak current densities of 10, 20 and 40 ...
Evaluation of Li-Air Batteries With EC-DEC Based Nanocomposite Electrolytes

A. Akbulut; M. O. Guler; Çetinkaya, Tuğrul; Uysal, Mehmet; Akbulut, Hatem (POLISH ACAD SCIENCES INST PHYSICS, 2015)

Electrolytes based on organic carbonate solvents of ethylene carbonate (EC) and diethyl carbonate (DEC) were prepared by using LiPF6 as the Li-source. Nano sized Al2O3 (50 nm) was used as a reinforcing component in order ...
Fabrication of Sn-Ni/MWCNT composite coating for Li-ion batteries by pulse electrodeposition: Effects of duty cycle

Uysal, Mehmet; Çetinkaya, Tuğrul; Alp, Ahmet; Akbulut, Hatem (ELSEVIER, 2015)

Nanocrystalline Sn-Ni/MWCNT composite was prepared by ultrasonic-pulse electrodeposition on a copper substrate in a pyrophosphate bath at different duty cycles. Surface morphology of produced Sn-Ni/MWCNT composites were ...
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 oxide/alpha-MnO2 nanocomposite electrodes produced using planetary ball milling for Li-O-2 batteries

Çetinkaya, Tuğrul; Tokur, Mahmud; Şeyma Özcan; Algül, Hasan; Uysal, Mehmet; Akbulut, Hatem (ELSEVIER SCIENCE BV, 2015)

Graphene Oxide (GO)/alpha-MnO2 nanocomposite air breathing cathodes were prepared using mechanical alloying method. For preparation of GO/alpha-MnO2 nanocomposite cathodes, GO was produced by Hummer's method and alpha-MnO2 ...
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 ...
High efficiency TiO2/MWCNT based anode electrodes for Li-ion batteries

Güler, Mehmet Oğuz; Çetinkaya, Tuğrul; Uysal, Mehmet; Akbulut, Hatem (WILEY, 2015)

Freestanding multiwalled carbon nanotube and titanium (IV) oxide anode paper was prepared by vacuum filtration of multiwall carbon nanotubes/TiO2 hybrid material, which was synthesized by the radio frequency magnetron ...