Li2MTiO4 (M=Mn, Fe, Co, Ni): New cation-disordered rocksalt oxides exhibiting oxidative deintercalation of lithium. Synthesis of an ordered Li2NiTiO4

Sebastian, Litty; Gopalakrishnan, J.

doi:10.1016/s0022-4596(03)00010-0

Cited by 49 publications

(34 citation statements)

References 19 publications

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“…Another family of positive materials which theoretically enable a reversible exploration of more than 1 mol of lithium per formula unit are lithium transition metal oxides stabilized with titanium (so-called "titanates"). This family of positive materials with a general formula of Li 2 MTiO 4 (M is transition metal) crystallize in a cubic rock-salt structure with considerable cation disorder [6,7,8]. The presence of Ti 4+ in the structure and its strong bond with O 2-enables the transition metals to be easily oxidized to a higher oxidation state [9].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characteristics of Li2−VTiO4 rock salt phase in Li-ion batteries

Dominko

Garrido

Bele

et al. 2011

Journal of Power Sources

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Li 2-x VTiO 4 /C sample with a disordered rock salt structure was successfully prepared by annealing at a temperature of 850°C. The electrochemical oxidation in the first cycle occurs at voltages above 4 V versus metallic lithium, while the shapes of the electrochemical curves in consequent reduction -oxidation processes show a monotonous change of the potential between the selected cut-off voltages. A linear combination fit of individual XANES spectra was used for the determination of the oxidation states of as prepared sample and intermediate states during oxidation and reduction. In the as-prepared sample, vanadium was found to be in the average oxidation state of V 3.5+ and was additionally oxidized to V 3.8+ by the electrochemical charging. During the discharge process, the vanadium oxidation state was reduced to V 3.0+ . In-situ X-ray diffraction patterns and EXAFS analysis suggest good structural stability during oxidation and reduction, which is also reflected in the cycling stability if batteries were cycled in the voltage window between 2.0 V and 4.4 V. Extension of

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Section: Introductionmentioning

confidence: 99%

Electrochemical characteristics of Li2−VTiO4 rock salt phase in Li-ion batteries

Dominko

Garrido

Bele

et al. 2011

Journal of Power Sources

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“…Previous studies of rock salt type oxides containing lithium showed that these materials are potential ionic conductors and the Li 2 MTiO 4 (M = Mn, Fe, Co, and Ni) dielectrics were first investigated as a new series of lithium cathode materials [10,11]. Mg 2 TiO 4 , however, is extensively studied as dielectric material because of its dielectric constant is stable with temperature and frequency [2].…”

Section: Introductionmentioning

confidence: 99%

Low-loss microwave dielectrics using rock salt oxide Li2MgTiO4

Tseng

Chen

Kuo

et al. 2011

Journal of Alloys and Compounds

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“…All of these materials are well-ordered materials in which lithium ions and other cations occupy distinct sites. In 2003, for the first time, cation-disordered materials were investigated as cathode materials [7]. Li 2 MTiO 4 (M = Mn, Fe, Co, Ni) materials as the representative cation-disordered materials have attracted much attention due to their high theoretical capacity (about 290 mAh g −1 ) and stability of structure [7].…”

Section: Introductionmentioning

confidence: 99%

Lithium-Excess Research of Cathode Material Li2MnTiO4 for Lithium-Ion Batteries

et al. 2015

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Lithium-excess and nano-sized Li2+xMn1−x/2TiO4 (x = 0, 0.2, 0.4) cathode materials were synthesized via a sol-gel method. The X-ray diffraction (XRD) experiments indicate that the obtained main phases of Li2.0MnTiO4 and the lithium-excess materials are monoclinic and cubic, respectively. The scanning electron microscope (SEM) images show that the as-prepared particles are well distributed and the primary particles have an average size of about 20-30 nm. The further electrochemical tests reveal that the charge-discharge performance of the material improves remarkably with the lithium content increasing. Particularly, the first discharging capacity at the current of 30 mA g of Li2.4Mn0.8TiO4. In addition, the ex situ XRD experiments indicate that the monoclinic Li2MnTiO4 tends to transform to an amorphous state with the extraction of lithium ions, while the cubic Li2MnTiO4 phase shows better structural reversibility and stability.

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Li2MTiO4 (M=Mn, Fe, Co, Ni): New cation-disordered rocksalt oxides exhibiting oxidative deintercalation of lithium. Synthesis of an ordered Li2NiTiO4

Cited by 49 publications

References 19 publications

Electrochemical characteristics of Li2−VTiO4 rock salt phase in Li-ion batteries

Electrochemical characteristics of Li2−VTiO4 rock salt phase in Li-ion batteries

Low-loss microwave dielectrics using rock salt oxide Li2MgTiO4

Lithium-Excess Research of Cathode Material Li2MnTiO4 for Lithium-Ion Batteries

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