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    Wyświetlanie 1-7 z 7
    Tytuł:
    Electrochemical Performance of SnO₂ and SnO₂/MWCNT/Graphene Composite Anodes for Li-Ion Batteries
    Autorzy:
    Cevher, O.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032560.pdf
    Data publikacji:
    2017-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uj
    81.15.Cd
    82.47.Aa
    Opis:
    In this study, tin oxide (SnO₂) coatings on Cr coated stainless steel and multi-walled carbon nanotube (MWCNT)/graphene substrates were prepared using a radio frequency magnetron sputtering process as anode materials in lithium-ion batteries. SnO₂ thin film and SnO₂/MWCNT/graphene composite were characterized with field-emission scanning electron microscopy, X-ray diffraction, and electrochemical tests (cyclic voltammetry and galvanostatic cycling). The electrochemical properties of SnO₂ and SnO₂/MWCNT/graphene composite anodes were studied using 2016-type coin cells assembled in an argon-filled glove box. The cells were cyclically tested on a MTI BST8-MA battery analyzer. The cyclic voltammograms of SnO₂ anode and SnO₂/MWCNT/graphene composite anode were obtained over the potential range of 0.05-3.0 V and 0.05-2.5 V at a scan rate of 0.05 mV s¯¹, respectively.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 1; 204-206
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of RF Power on Electrical and Structural Properties of Sputtered $SnO_2$:Sb Thin Films
    Autorzy:
    Cevher, O.
    Guler, M.
    Tocoglu, U.
    Cetinkaya, T.
    Akbulut, H.
    Okumus, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1218075.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    68.55.ag
    81.15.Cd
    Opis:
    In this work, antimony doped tin oxide ($SnO_2$:Sb) thin films were fabricated using a radio frequency magnetron sputtering system on Si wafer and glass substrates. The base pressure in the sputtering chamber was 1.0 Pa. The $SnO_2$:Sb thin films were deposited for 1.0 h in a mixture of Ar and $O_2$ environment with $O_2$/Ar ratio of 10/90 at 75, 100, and 125 W RF sputtering powers. The microstructure of $SnO_2$:Sb thin films was assessed using a field emission scanning electron microscopy. The crystallographic structure of the sample was determined by X-ray diffraction. The average surface roughness $(R_{a})$ was measured with atomic force microscopy. The electrical resistivity of the deposited films was measured by the four-point-probe method. The thicknesses of the films were measured by surface profiler.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 293-295
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanostructured ATO Anodes Produced by RF Magnetron Sputtering for Li-Ion Batteries
    Autorzy:
    Cevher, O.
    Tocoglu, U.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401282.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uj
    81.15.Cd
    82.47.Aa
    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.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1065-1067
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399886.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Dz
    81.15.Cd
    82.47.Aa
    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.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 355-357
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanostructured Silicon Thin Film Electrodes for Li-Ion Batteries
    Autorzy:
    Tocoglu, U.
    Cetinkaya, T.
    Cevher, O.
    Oguz Guler, M.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399941.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uf
    81.15.Cd
    82.47.Aa
    Opis:
    In this study we produced nanostructured silicon thin films as lithium ion battery electrodes. Films were sputtered onto stainless steel substrates from high purity silicon target via dc magnetron sputtering technique with using different powers. Morphology and crystal structure of films were characterized with the use of scanning electron microscopy, X-ray diffraction and energy dispersive spectroscopy analysis, respectively. The thickness of films was measured by using surface profiler. Coin type test cells were assembled in argon filled glove box. Electrochemical performance of cells was tested on an electrochemical analyzer using constant current densities over a voltage range of 0.2-2 V.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 380-382
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Tin Oxide Based Nanocomposites for Li-Ion Batteries
    Autorzy:
    Cevher, O.
    Cetinkaya, T.
    Tocoglu, U.
    Guler, M.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399889.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    88.30.rh
    81.05.Dz
    81.15.Cd
    82.47.Aa
    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.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 358-360
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cyclic Performance Tests of Si/MWCNT Composite Lithium Ion Battery Anodes at Different Temperatures
    Autorzy:
    Tocoglu, U.
    Cevher, O.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192560.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.55.df
    81.15.Cd
    82.47.Aa
    78.67.Sc
    61.48.De
    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.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1059-1061
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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