Novel routes to Li4Ti5O12 spinel: Characterization and phase relations
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چکیده
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منابع مشابه
Mechano-thermally Activated Solid-state Synthesis of Li4Ti5O12 Spinel from Li2CO3-TiO2 Mixtures
Simultaneous TG/DSC measurements performed on mixtures 2Li2CO3-5TiO2 (anatase) subjected to high-energy milling showed that both the temperature and the enthalpy of Li2CO3 decomposition are much lower than in the case of TG/DSC runs performed on a sample of a physical mixture. On the basis of the thermoanalytical evidence a solid-state synthesis of the spinel compound Li4Ti5O12 has been propose...
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Through a facile sodium sulfide (Na2S)-assisted hydrothermal treatment, clean and nondefective surfaces are constructed on micrometer-sized Li4Ti5O12 particles. The remarkable improvement of surface quality shows a higher first cycle Coulombic efficiency (≈95%), a significantly enhanced cycling performance, and a better rate capability in electrochemical measurements. A combined study of Raman ...
متن کاملFirst-principles analysis on role of spinel (111) phase boundaries in Li4+3xTi5O12 Li-ion battery anodes.
The practical anode material Li4+3xTi5O12 is known to undergo a two-phase separation into Li7Ti5O12 and Li4Ti5O12 during charging/discharging. This phase-separated Li4+3xTi5O12 exhibits electron conduction, although individual phases are expected to be insulators. To elucidate the role played by spinel (111) phase boundaries on these physical properties, first principles calculations were carri...
متن کاملStudy of the interface between Na-rich and Li-rich phases in a Na-inserted spinel Li4Ti5O12 crystal for an electrode of a sodium-ion battery.
Spinel lithium titanate (LTO; Li4Ti5O12) is one of the promising materials for negative electrodes of sodium-ion batteries (SIBs). The stable charge-discharge performance of SIB cells using LTO electrodes depends on the reversible Na insertion-extraction mechanism of LTO, where the spinel lattice is expanded with Na insertion, and two phases, Na-inserted LTO (Na-LTO) and Li-inserted LTO (Li-LTO...
متن کاملSynthesis and electrochemical properties of LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12
Spinel compound LiNi0.4Mn1.5Cr0.1O4 (LNMCO) and Li4Ti5O12 (LTO) were synthesized by different methods. The particle sizes of LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12 were 05-2 um and 0.5-0.8 um, respectively. The LiNi0.4Mn1.5Cr0.1O4/Li4Ti5O12 (LNMCO/LTO) cell exhibited good electrochemical properties at high current rate such as 1 C. When specific capacity was determined based on the mass of LNMCO cat...
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تاریخ انتشار 2011