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Wyszukujesz frazę "Li4Ti5O12" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Effects of $TiO_2$ Source on the Electrochemical Performance of $Li_4Ti_5O_{12}$
    Autorzy:
    Kiliç Dokan, F.
    Şahan, H.
    Özdemır, N.
    Özdemır, B.
    Patat, Ş.
    Powiązania:
    https://bibliotekanauki.pl/articles/1311661.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    88.80.ff
    Opis:
    This study examined the formation mechanism of $Li_4Ti_5O_{12}$ by a ball mill assisted solid-state reaction between $Li_2CO_3$ and $TiO_2$ for applications in lithium ion batteries, also effects of $TiO_2$ source such as rutile type and anatase type on the electrochemical performance of $Li_{4}Ti_5O_{12}$. However, it is believed that the particle properties may depend significantly on the synthesis process and starting materials, which lead to final products with a range of sizes, morphologies, and even phases.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 650-651
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Process Design for Size-Controlled Flame Spray Synthesis of Li4Ti5O12 and Electrochemical Performance
    Autorzy:
    Waser, O.
    Brenner, O.
    Groehn, A.J.
    Pratsinis, S.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/952680.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Li-ion battery
    Li4Ti5O12
    size control
    residence time distribution computational fluid
    dynamics
    flame synthesis of electroceramics
    bateria litowo-jonowa
    kontrola rozmiaru
    płyn obliczeniowy do dystrybucji czasu przebywania
    dynamika
    synteza płomieniowa elektroceramiki
    Opis:
    Inexpensive synthesis of electroceramic materials is required for efficient energy storage. Here the design of a scalable process, flame spray pyrolysis (FSP), for synthesis of size-controlled nanomaterials is investigated focusing on understanding the role of air entrainment (AE) during their aerosol synthesis with emphasis on battery materials. The AE into the enclosed FSP reactor is analysed quantitatively by computational fluid dynamics (CFD) and calculated temperatures are verified by Fourier transform infrared spectroscopy (FTIR). Various Li4Ti5O12 (LTO) particle compositions are made and characterized by N2 adsorption, electron microscopy and X-ray diffraction while the electrochemical performance of LTO is tested at various charging rates. Increasing AE decreases recirculation in the enclosing tube leading to lower reactor temperatures and particle concentrations by air dilution as well as shorter and narrower residence time distributions. As a result, particle growth by coagulation - coalescence decreases leading to smaller primary particles that are mostly pure LTO exhibiting high C-rate performance with more than 120 mAh/g galvanostatic specific charge at 40C, outperforming commercial LTO. The effect of AE on FSP-made particle characteristics is demonstrated also in combustion synthesis of LiFePO4 and ZrO2.
    Źródło:
    Chemical and Process Engineering; 2017, 38, 1; 51-66
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sol-Gel Synthesis of Nanocomposite $Cu-Li_4Ti_5O_{12}$ Structures for Ultrahigh Rate Li-Ion Batteries
    Autorzy:
    Erdas, A.
    Ozcan, S.
    Guler, M.
    Akbulut, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401274.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.47.Aa
    88.80.ff
    Opis:
    In this study, spinel $Li_4Ti_5O_{12}$ materials were successfully synthesized by a simple and facile sol-gel process and electroless copper deposition techniques. The characteristics of the as-prepared $Li_4Ti_5O_{12}$ and $Cu-Li_4Ti_5O_{12}$ were examined by X-ray diffraction and scanning electronic microscopy, while the electrochemical performances including charge/discharge and rate performance tests were also investigated. $Cu-Li_4Ti_5O_{12}$ electrode demonstrated the superior initial discharge capacity and rate capability to $Li_4Ti_5O_{12}$ electrode, cycled between 1.0 and 2.5 V. The enhanced rate capability can be attributed to the higher $Li^{+}$ diffusivity and lower charge-transfer resistance due to the electroless deposition of copper. Moreover, when both electrodes discharged with 80 C state of discharge conditions, the reversible capacities were further increased ım70 mAh $g^{-1}$ with excellent cycling stability and almost no irreversible capability was observed during cycling.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1026-1028
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Characterization of Spinel $Li_4Ti_5O_{12}$ Anode Material by CTAB Assisted Sol-Gel Method
    Autorzy:
    Kiliç Dokan, F.
    Şahan, H.
    Özdemır, B.
    Özdemır, N.
    Patat, Ş.
    Powiązania:
    https://bibliotekanauki.pl/articles/1293936.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    88.80.ff
    Opis:
    Recently, there has been considerable interest in $Li_4Ti_5O_{12}$ as a potential anode for use in lithium ion batteries. It has many advantages compared to the currently used graphite. It has a good reversibility but no structural change. The material has a theoretical specific capacity of 175 mAh $g^{-1}$. $Li_4Ti_5O_{12}$ powders are usually synthesized by a solid-state reaction of lithium and titanium salts. This method was generally preferred because the synthesis procedures are simple. But there are some disadvantages of solid-state methods such as larger particle size of the products, inhomogeneous distribution, lack of stoichiometry control, etc. These disadvantages can be overcome by sol-gel method. Using surfactant in sol-gel method is easy control on crystal growth and size of the desired products.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 648-649
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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