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Wyszukujesz frazę "82.47.Aa" wg kryterium: Temat

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    Wyświetlanie 1-10 z 10
    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.
    Powiązania:
    https://bibliotekanauki.pl/articles/1181928.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.47.Aa
    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.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 290-292
    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:
    Nanocomposite ZnO:MWCNT Thin Films for Li-Ion Batteries Prepared via Reactive Magnetron Sputtering
    Autorzy:
    Guler, M.
    Cetinkaya, T.
    Cevher, O.
    Tocoglu, U.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1195252.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.47.Aa
    61.48.De
    77.55.hf
    Opis:
    In this study, ZnO/MWCNT buckypaper nanocomposite structures were obtained as an anode electrode material for Li-ion batteries. MWCNT based buckypapers were produced via vacuum filtration techniques and the surfaces of the buckypapers were coated with ZnO in order to increase stability and mechanical integrity during charging and discharging processes. The effect of deposition powers on the battery performance is also investigated.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 319-321
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thin Film Nanostructured ATO and ATO Based Composite Anodes for Li-Ion Batteries
    Autorzy:
    Cevher, O.
    Guler, M.
    Tocoglu, U.
    Cetinkaya, T.
    Akbulut, H.
    Okumus, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1218094.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uj
    88.30.rh
    82.47.Aa
    Opis:
    In this study, antimony doped tin oxide films were deposited on multiwall carbon nanotube buckypaper and Cr coated stainless steel substrates using a radio frequency magnetron sputtering process in a mixed oxygen/argon (5/95) gas environment. The depositions of antimony doped tin oxide on the multiwall carbon nanotube buckypaper and stainless steel substrates were carried out using the parameters organized as: target composition antimony doped tin oxide ($SnO_2$:Sb = 90:10 wt%); total system pressure 1 Pa; sputtering power (RF) 100 W. The surface morphology of the antimony doped tin oxide films was investigated by field emission scanning electron microscopy. The crystallographic structure of the samples was determined by X-ray diffraction. The electrochemical properties of antimony doped tin oxide and antimony doped tin oxide-multiwall carbon nanotube nanocomposite anodes containing CR2016 cells were measured by galvanostatic charge-discharge experiments.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 296-298
    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:
    Electrochemical Performance of Silicon/MWCNT Composite Electrodes for Lithium Ion Batteries
    Autorzy:
    Cetinkaya, T.
    Tocoglu, U.
    Cevher, O.
    Guler, M.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1195120.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Ni
    81.20.Ev
    82.45.Fk
    82.47.Aa
    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.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 285-287
    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:
    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.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399947.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.uf
    81.05.uf
    81.20.Ev
    82.45.Fk
    82.47.Aa
    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.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 393-395
    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 1-10 z 10

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