New Class of Titanium Niobium Oxide for a Li-Ion Host: TiNbO4 with Purely Single-Phase Lithium Intercalation

ABSTRACTThis paper reports on electroanalytical studies of the intercalation-deintercalation of lithium into lithiated transition metal oxides which are used as cathodes for Li ion batteries. These include LixCoO2 LixNiO2 and LixMn2O4 spinel. The basic electroanalytical response of these systems in LiAsF6 1M/EC-DMC solutions was obtained from the simultaneous use of slow and fast scan cyclic voltammetry (SSCV), potentiostatic intermittent titration (PITT) (from which D vs. E was calculated), and impedance spectroscopy (EIS). Surface sensitive FTIR spectroscopy and XRD were also used for surface and 3D characterization, respectively. A large and important denominator was found in the electrochemical behavior of lithium intercalation-deintercalation into these transition metal oxides and graphite. The use of the electroanalytical response of these systems as a tool for the study of stabilization and failure mechanisms of these materials as cathodes in rechargeable Li batteries is demonstrated and discussed.

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In situ SEM study of lithium intercalation in individual V2O5 nanowires

Nanoscale ◽

10.1039/c4nr06767c ◽

2015 ◽

Vol 7 (7) ◽

pp. 3022-3027 ◽

Cited By ~ 31

Author(s):

Evgheni Strelcov ◽

Joshua Cothren ◽

Donovan Leonard ◽

Albina Y. Borisevich ◽

Andrei Kolmakov

Keyword(s):

Electrode Materials ◽

Lithium Intercalation ◽

Li Ion Batteries ◽

Length Scales ◽

Rational Engineering ◽

Electrochemical Processes ◽

Multiple Length Scales ◽

Sem Study ◽

Li Ion

Progress in rational engineering of Li-ion batteries requires better understanding of the electrochemical processes and accompanying transformations in the electrode materials on multiple length scales.

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A New Class of Single-Phase High-Frequency Isolated Z-Source AC–AC Converters With Reduced Passive Components

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2017.2686903 ◽

2018 ◽

Vol 33 (2) ◽

pp. 1410-1419 ◽

Cited By ~ 6

Author(s):

Hafiz Furqan Ahmed ◽

Honnyong Cha

Keyword(s):

High Frequency ◽

Single Phase ◽

Passive Components ◽

New Class ◽

Ac Converters

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REBa2ZrO5.5 (RE = La, Ce, Eu, and Yb): Synthesis, characterization, and their potential use as substrates for YBa2Cu3O7–δ superconductors

Journal of Materials Research ◽

10.1557/jmr.1997.0392 ◽

1997 ◽

Vol 12 (11) ◽

pp. 2976-2980 ◽

Cited By ~ 10

Author(s):

R. Jose ◽

Asha M. John ◽

J. Kurian ◽

P. K. Sajith ◽

J. Koshy

Keyword(s):

Single Phase ◽

Detrimental Effect ◽

Solid State Reaction Method ◽

Dielectric Constants ◽

X Ray Diffraction ◽

X Ray ◽

Resistivity Measurements ◽

New Class ◽

Zero Resistance ◽

Potential Use

A new class of complex perovskites REBa2ZrO5.5 (where RE = La, Ce, Eu, and Yb) have been synthesized and sintered as single phase materials by the solid state reaction method. The structure of these materials was studied by x-ray diffraction, and all of them were found to be isostructural, having a cubic perovskite structure. X-ray diffraction and resistivity measurements have shown that there is no detectable chemical reaction between YBa2Cu3O7–delta; and REBa2ZrO5.5 even under severe heat treatment at 950 °C, and that the addition of REBa2ZrO5.5 up to 20 vol.% in YBa2Cu3O7–δ shows no detrimental effect on the superconducting properties of YBa2Cu3O7-δ. Dielectric constants and loss factors are in the range suitable for their use as substrates for microwave applications. Thick films of YBa2Cu3O7–δ fabricated on polycrystalline REBa2ZrO5.5 substrates gave a zero resistance transition temperature Tc(0) ∼ 92 K, indicating the suitability of these materials as substrates for YBa2Cu3O7–δ.

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