Journal ArticleDOI
Powder diffraction study of LiCu 2 O 2 crystals
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LiCu 2 O 2 crystals were studied by powder X-ray diffraction and phase analysis showed that the applied growth conditions are suitable for preparation of a single-phase compound.Abstract:
LiCu 2 O 2 crystals grown by spontaneous crystallization from the fluxed melt were studied by powder X-ray diffraction. The phase analysis shows that the applied growth conditions are suitable for preparation of a single-phase compound. The as-grown crystals contain only traces of foreign phases (Li 2 CuO 2 , CuO, Cu 2 O) typical for preparation of the LiCu 2 O 2 compound. Attempts to anneal or quench the as-grown crystals led to two-phase samples containing LiCu 2 O 2 and LiCu 3 O 3 . X-ray powder diffraction pattern of a LiCu 2 O 2 crystal is reported and compared with literature data. The crystal structure is orthorhombic, space group Pnma , in agreement with literature data. Lattice parameters of the studied sample are a =5.7286(2) A, b =2.8588(1) A, and c =12.4143(3) A. Time evolution of a diffraction pattern illustrates a slow increase of the secondary-phases contribution assumed to be due to interaction of the powdered crystal with humid air. A brief summary of compounds known in the Li–Cu–O system is includedread more
Citations
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Journal ArticleDOI
Ab initio calculation of d-d excitations in quasi-one-dimensional Cu d(9) correlated materials
Hsiao-Yu Huang,Nikolay A. Bogdanov,Liudmila Siurakshina,Liudmila Siurakshina,Peter Fulde,Peter Fulde,Jeroen van den Brink,Liviu Hozoi +7 more
TL;DR: In this paper, a complete set of local excitations has been calculated for cuprates with corner sharing (Sr${}_{2}$CuO${}_3}$ and SrCuO{}_4}$) and edge-sharing (LiVCuO={}_6}$ octahedra (KCuF${} ǫ ) for the ladder system CaCu{} Ã 0.
Journal ArticleDOI
Thermodynamic investigations of copper oxides used as conversion type electrodes in lithium ion batteries
Maren Lepple,Robert Adam,Damian M. Cupid,Peter Franke,Thomas Bergfeldt,Daniel Wadewitz,David Rafaja,Hans Jürgen Seifert +7 more
TL;DR: In this paper, the LiCu2O2 phase was synthesized using the solid-state method and characterized with X-ray powder diffraction technique and Rietveld analysis as well as inductively coupled plasma-optical emission spectrometry (ICP-OES).
Journal ArticleDOI
Growth and properties of LiCu2O2-NaCu2O2 crystals
TL;DR: In this paper, a plate-like Li1 − xNaxCu2O2 single crystals up to 2 × 10 × 10 mm in dimensions have been grown by slowly cooling Li2CO3·xNa2O 2·4CuO melts in alundum crucibles in air.
BookDOI
Kupfer- und Eisenoxide als Konversions-Elektrodenmaterialien für Lithium-Ionen-Batterien: Thermodynamische und Elektrochemische Untersuchungen
TL;DR: In this article, a thermodynamic approach was used to elucidate the electrochemical behavior of conversion-type electrodes using Li-Cu-O and Li-Fe-O as model material systems.
Journal ArticleDOI
Heat Capacities of LiCu2O2 and CuO in the Temperature Range 323-773 K and Cu2O in the Temperature Range 973-1273 K
TL;DR: In this article, differential scanning calorimetry was used to measure the heat capacities of binary and ternary oxides in the Li-Cu-O system for the development of new anode materials for lithium ion batteries based on copper oxides.
References
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Journal ArticleDOI
Powerful oxidizing agents for the oxidative deintercalation of lithium from transition-metal oxides
TL;DR: In this paper, the deintercalation of lithium from LiCoO 2 and Li 2 CuO 2 was shown to yield materials of composition Li x M O 2 with x ∼ 0 for Co and x ∼ 1.5 for Cu.
Journal ArticleDOI
Die Kristallstruktur von Li2CuO2
Rudolf Hoppe,Hilmar Rieck +1 more
TL;DR: In this article, the Madelung Part of Lattice Energy (MAPLE) is calculated and discussed, and the MADELung-Anteil der Gitterenergie wird berechnet und diskutiert.
Journal ArticleDOI
Electrochemical and structural study of Li2CuO2, LiCuO2 and NaCuO2
TL;DR: In this article, Li2−xCuO2 electrode was cycled at 0.5 mA/cm−2 and a rechargeable capacity of 130 mAh/g−1 was obtained with an average voltage of 2.5 V.
Journal ArticleDOI
LiCu2O2 and LiCu3O3: New mixed valent copper oxides
TL;DR: In this article, the structure of LiCu2O2 (I) and LiCu3O3 (II) was solved in P4 2 nmc with a = 571.9(1), b = 572.4(3), c = 1240.1 (4) pm, and Z = 1 (four-circle diffractometer CAD4, 82 I0(hkl), MoKα, RW = 1.9%).
Journal ArticleDOI
Extended Moment Formation and Second Neighbor Coupling in Li 2 CuO 2
Ruben Weht,Warren E. Pickett +1 more
TL;DR: In this article, the Cu-O edge-sharing compound, whose ferromagnetic chains are antialigned, is found from local spin density calculations to display several surprising characteristics: (1) the ordered moment per formula unit of $0.92{\ensuremath{\mu}}_{B}$ is the largest for any low dimensional cuprate system, in agreement with experiment; (2) $40%$ of this moment lies on the neighboring O ions, making it equal to the largest oxygen moment yet calculated; and (3) the second neighbor couplings are larger