On the Study of Ca and Mg Deintercalation from Ternary Tantalum Nitrides.

Layered CaTaN and MgTaN and cubic MgTaN were prepared by direct solid state reaction from the binary nitrides TaN and AN (A: Mg, Ca). CaTaN showed a slight Ca deficiency (0.11 moles per formula), and a monoclinic distortion from previously reported 3̅ symmetry, with space group 2/ and cell parameters = 5.

A New CuO-Fe O -Mesocarbon Microbeads Conversion Anode in a High-Performance Lithium-Ion Battery with a Li Ni Fe Mn O Spinel Cathode.

A ternary CuO-Fe O -mesocarbon microbeads (MCMB) conversion anode was characterized and combined with a high-voltage Li Ni Fe Mn O spinel cathode in a lithium-ion battery of relevant performance in terms of cycling stability and rate capability. The CuO-Fe O -MCMB composite was prepared by using high-energy milling, a low-cost pathway that leads to a crystalline structure and homogeneous submicrometrical morphology as revealed by XRD and electron microscopy. The anode reversibly exchanges lithium ions through the conversion reactions of CuO and Fe O and by insertion into the MCMB carbon.

Insight on the LiS electrochemical process in a composite configuration electrode.

A novel, low cost and environmentally sustainable lithium sulfide-carbon composite cathode, suitably prepared by combining polyethylene oxide (PEO), LiCFSO and LiS-C powders is here presented. The cathode is characterized in lithium-metal cell employing a solution of LiCFSO salt in dioxolane-dimethylether (DOL-DME) as the electrolyte. Detailed NMR investigation of the diffusion properties of the electrolyte is reported in order to determine its suitability for the proposed cell.

Stable, high voltage Li0.85Ni0.46Cu0.1Mn1.49O4 spinel cathode in a lithium-ion battery using a conversion-type CuO anode.

We report in this work a copper-doped Li0.85Ni0.46Cu0.