Chemically induced magnetism and magnetoresistance in La(0.8)Sr(1.2)Mn(0.6)Rh(0.4)O(4)

Layered perovskite LiEuTiO4 as a 0.8 V lithium intercalation electrode

Lithium intercalation into LiEuTiO4 with a 0.8 V potential plateau considering both the energy density and tolerance of lithium plating.

Nano-Crystalline Li1.2Mn0.6Ni0.2O₂ Prepared via Amorphous Complex Precursor and Its Electrochemical Performances as Cathode Material for Lithium-Ion Batteries

An amorphous complex precursor with uniform Mn/Ni cation distribution is attempted for preparing a nano-structured layered Li-rich oxide (Li_1.2Mn_0.6Ni_0.2O₂)cathode material, using diethylenetriaminepentaacetic acid (DTPA) as a chelating agent. The materials are characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical tests. The crystal structure of Li-rich materials is found to be closely related to synthesis temperature. As-obtained nano materials sintered at 850 °C for 10 h show an average size of 200 nm with a single crystal phase and good crystallinity. At a current density of 20 mA·g⁻¹, the specific discharge capacity reaches 221 mAh·g⁻¹ for the first cycle and the capacity retention is 81% over 50 cycles. Even at a current density of 1000 mA·g⁻¹, the capacity is as high as 118 mAh·g⁻¹. The enhanced rate capability can be ascribed to the nano-sized morphology and good crystal structure.

Direct Evidence for Ferromagnetism of Nanometer-Scale Palladium by Contact with Perovskite Manganite

Using a template method, we have synthesized hybrid Pd/La0.7Ca0.3-xSrxMnO3 (LCSMO) materials, which were evidenced by SEM, TEM, X-ray powder diffraction, and magnetization measurements. It was found that the Pd moment was induced by the rough LCSMO oxide, which was quantitatively analyzed. Our results provided direct evidence for ferromagnetism of nanosized Pd materials by contact with the perovskite manganite.