Autor: Tocoglu, U. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Nanostructured ATO Anodes Produced by RF Magnetron Sputtering for Li-Ion Batteries
Autorzy:: Cevher, O.
Tocoglu, U.
Akbulut, H.
Tematy:: 61.72.uj
81.15.Cd
82.47.Aa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1401282.pdf Link otwiera się w nowym oknie
Opis:: In this study, the reversible capacities, as well as the cycling behavior, of crystalline antimony-doped tin oxide (ATO) films have been investigated. ATO films were deposited on Cr-coated stainless steel substrates by the RF magnetron sputtering technique, with antimony-doped tin oxide (SnO₂:Sb) target in a mixed oxygen/argon gas environment. The ATO films were deposited for 1.0 h in a mixture of Ar and O₂ environment with O₂/Ar ratio of 10/90, at sputtering power of 75 W, 100 W and 125 W RF. ATO films were examined by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM). The electrochemical properties of ATO anodes were studied using 2016-type coin cells assembled in an argon-filled glove box.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Cyclic Performance Tests of Si/MWCNT Composite Lithium Ion Battery Anodes at Different Temperatures
Autorzy:: Tocoglu, U.
Cevher, O.
Akbulut, H.
Tematy:: 77.55.df
81.15.Cd
82.47.Aa
78.67.Sc
61.48.De; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1192560.pdf Link otwiera się w nowym oknie
Opis:: In this study silicon-multi walled carbon nanotube (Si-MWCNT) lithium ion battery anodes were produced and their electrochemical galvanostatic charge/discharge tests were conducted at various (25°C, 35°C, 50°C) temperatures to determine the cyclic behaviors of anode at different temperatures. Anodes were produced via vacuum filtration and DC magnetron sputtering technique. Silicon was sputtered onto buckypapers to form composite structure of anodes. SEM analysis was conducted to determine morphology of buckypapers and Si-MWCNT composite anodes. Structural and phase analyses were conducted via X-ray diffraction and Raman Spectroscopy technique. CR2016 coin cells were assembled for electrochemical tests. Cyclic voltammetry test were carried out to determine the reversibility of reactions between anodes and reference electrode between 0.01-2.0 V potential window. Galvanostatic charge/discharge tests were performed to determine cycle performance of anodes at different temperatures.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Characteristics and Electrochemical Performance of $TiO_2$:MWCNT Nanocomposite Anodes for Li-Ion Batteries
Autorzy:: Guler, M.
Cetinkaya, T.
Cevher, O.
Tocoglu, U.
Akbulut, H.
Tematy:: 82.45.Mp
61.48.De; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1218684.pdf Link otwiera się w nowym oknie
Opis:: In this study, highly porous buckypapers were manufactured via vacuum filtration techniques and nanocrystalline $TiO_2$ thin films were deposited on buckypapers using reactive radio frequency magnetron sputtering to understand the role of the deposition power. In addition, the effects of the deposition parameters on the electrochemical properties as an anode electrode for Li-ion batteries have also been studied.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Investigation of Tin Oxide Based Nanocomposites for Li-Ion Batteries
Autorzy:: Cevher, O.
Cetinkaya, T.
Tocoglu, U.
Guler, M.
Akbulut, H.
Tematy:: 88.30.rh
81.05.Dz
81.15.Cd
82.47.Aa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399889.pdf Link otwiera się w nowym oknie
Opis:: In this work, tin oxide ($SnO_2$) films were deposited on multiwall carbon nanotube buckypaper using a rf magnetron sputter process in a mixed oxygen/argon (1/9) gas environment. Conditions for the growth of $SnO_2$ thin films on multiwall carbon nanotube buckypaper by rf sputtering are: target composition $SnO_2$ (99.999 wt%); total system pressure 1 Pa; sputtering power (rf) 75, 100 and 125 W, respectively; $O_2//Ar$ (1/9) gas mixture. The surface morphology of the $SnO_2$ multiwall carbon nanotube composite films was investigated by scanning electron microscopy. The crystallographic structure of the sample was determined by X-ray diffraction. The electrochemical properties of $SnO_2$ multiwall carbon nanotube composite anodes were investigated by galvanostatic charge-discharge experiments.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Synthesis and Characterization of Antimony Doped Tin Oxide Nanocomposites for Li-Ion Batteries
Autorzy:: Guler, M.
Cevher, O.
Tocoglu, U.
Cetinkaya, T.
Akbulut, H.
Tematy:: 61.48.De
82.45.Mp
82.47.-a; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399942.pdf Link otwiera się w nowym oknie
Opis:: High content carbon nanotubes mats have been produced to multi-walled carbon nanotubes. Sb doped $SnO_2$ films were then deposited by rf magnetron sputtering on buckypapers substrates. The effect of oxidation pressure on the structural, compositional, and electrochemical properties of the films was investigated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Preparation and Characterisation of Silicon/Carbon Nanotube Composite Electrodes for Li-Ion Battery Systems
Autorzy:: Cetinkaya, T.
Tocoglu, U.
Cevher, O.
Guler, M.
Akbulut, H.
Tematy:: 61.72.uf
61.48.De
81.20.Ev
81.07.-b; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399951.pdf Link otwiera się w nowym oknie
Opis:: Silicon powders and different amounts of multiwalled carbon nanotube were mechanically alloyed in polyacrynitrile solution via high speed planetary ball milling. Produced composite was characterised via X-ray diffraction pattern, scanning electron microscopy, energy dispersive spectroscopy and thermogravimetric analysis.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Electrochemical Performance of Silicon/MWCNT Composite Electrodes for Lithium Ion Batteries
Autorzy:: Cetinkaya, T.
Tocoglu, U.
Cevher, O.
Guler, M.
Akbulut, H.
Tematy:: 81.05.Ni
81.20.Ev
82.45.Fk
82.47.Aa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1195120.pdf Link otwiera się w nowym oknie
Opis:: Silicon/MWCNT composite electrodes were produced using high-speed planetary ball milling. Content of MWCNT were altered in silicon/MWCNT composite electrodes and effect of MWCNT content on the electrochemical performance of silicon electrodes were characterized by scanning electron microscopy and X-ray diffraction techniques. Coin type CR2016 test cells were assembled by using produced nanocomposite electrodes. Prepared test cells were electrochemically cycled at a current density of 200 mA/g. Furthermore, cyclic voltammetry curve of composite electrodes were performed to investigate electrochemical reactions between electrode and electrolyte.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Cyclic Performance Study of Silicon/Carbon Nanotube Composite Anodes Using Electrochemical Impedance Spectroscopy
Autorzy:: Tocoglu, U.
Cevher, O.
Cetinkaya, T.
Guler, M.
Akbulut, H.
Tematy:: 82.47.Aa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1181928.pdf Link otwiera się w nowym oknie
Opis:: Silicon based carbon nanotube composites were produced and their galvanostatic cycling properties analyzed depended on the electrochemical impedance spectroscopy. Composite anodes were produced via vacuum filtration and DC magnetron sputtering technique. Carbon nanotube papers were produced with vacuum filtration as substrate for silicon deposition and silicon was sputtered onto carbon nanotube papers via DC magnetron sputtering. Scanning electron microscopy and X-ray diffraction analysis were conducted for structural analysis of anodes. CR2016 coin cells were assembled for electrochemical tests. Electrochemical performance of anodes was tested via galvanostatic charge/discharge (100 cycles) analysis. Electrochemical impedance spectroscopy was carried out at every 25 charge/discharge cycle to determine relation between cyclic performance and electrochemical impedance of cells.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Preparation and Electrochemical Performance of ZnO Films as Anode Materials for Li-Ion Batteries
Autorzy:: Cevher, O.
Cetinkaya, T.
Tocoglu, U.
Guler, M.
Akbulut, H.
Tematy:: 81.05.Dz
81.15.Cd
82.47.Aa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399886.pdf Link otwiera się w nowym oknie
Opis:: In this work, the effect of rf power on the structural, electrical and electrochemical properties of ZnO thin films was investigated. ZnO thin films were deposited on glass and Cr coated stainless steel substrates by rf magnetron sputtering in pure Ar gas environment. ZnO thin films for different rf powers (75, 100, and 125 W) were deposited keeping all other deposition parameters fixed. ZnO thin films were used as negative electrode materials for lithium-ion batteries, whose charge-discharge properties, cyclic voltammetry and cycle performance were examined. A high initial discharge capacity about 908 mAh g^{-1} was observed at a 0.5 C rate between 0.05 and 2.5 V. The crystallographic structure of the sample was determined by X-ray diffraction. The electrical resistivity of the deposited films was measured by the four-point-probe method. The thickness of the ZnO thin films was measured using a profilometer.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Electrochemical Characterization of the Powder Silicon Anodes Reinforced with Graphite Using Planetary Ball Milling
Autorzy:: Cetinkaya, T.
Cevher, O.
Tocoglu, U.
Guler, M.
Akbulut, H.
Tematy:: 61.72.uf
81.05.uf
81.20.Ev
82.45.Fk
82.47.Aa; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1399947.pdf Link otwiera się w nowym oknie
Opis:: Mixed silicon/graphite anode materials were produced via mechanical milling process. The morphologies of mixed powders and electrodes were characterized via scanning electron microscopy and X-ray diffraction pattern. Electrochemical tests were performed by coin-type (CR2016) test cells. The cells were cyclically tested on a battery tester, and discharge capacities of produced anode materials were investigated with using constant current 300 mA/g over a voltage range of 80 mV-1.2 V.
Dostawca treści:: Biblioteka Nauki

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