Fluorine Doping Induced Crystal Space Change and Performance Improvement of Single Crystalline LiNi 0.6 Co 0.2 Mn 0.2 O 2 Layered Cathode Materials

Enhancing the electrochemical performance of the LiMn(2)O(4) hollow microsphere cathode with a LiNi(0.5)Mn(1.5)O(4) coated layer.

Spinel cathode materials consisting of LiMn2 O4 @LiNi0.5 Mn1.5 O4 hollow microspheres have been synthesized by a facile solution-phase coating and subsequent solid-phase lithiation route in an atmosphere of air. When used as the cathode of lithium-ion batteries, the double-shell LiMn2 O4 @LiNi0.5 Mn1.5 O4 hollow microspheres thus obtained show a high specific capacity of 120 mA h g(-1) at 1 C r...

Iron and cobalt co-doping of single crystalline titanium dioxide

Single-crystals of TiO2 rutile were co-implanted with iron and cobalt to investigate the interplay between the role of these ions and their influence in the magnetic properties of the system. In the co-implanted crystals, both ions were implanted with the same nominal fluence, 5 × 10 16 cm -2 , and an implantation energy of 150 keV. The as-implanted single crystals exhibited superparamagnetic b...

Mn / Rc - 97 / 02 4

Evaluating Electrical Properties, Band Gaps and Rate Capability of Li2MSiO4 (M= Mn, Fe, Co, Ni) Cathode Materials Using DOS Diagrams

In this study, theoretical investigations of Li2MSiO4 family cathode materials, including Li2MnSiO4, Li2FeSiO4, Li2CoSiO4, and Li2NiSiO4 are performed using density functional theory (DFT), by GGA and GGA+U methods. The materials properties including electrical conductivity and rate cap...

Synthesis and electrochemical properties of layered LiNi 2 / 3 Sb 1 / 3 O 2

LiNi2/3Sb1/3O2 has been prepared by ion-exchange from NaNi2/3Sb1/3O2. Powder X-ray diffraction (XRD) and single crystal electron diffraction y transmission electron microscopy (TEM) of the material indicate that it is isostructural with -NaFeO2. Electrochemical test shows that the eversible capacity for Li intercalation and deintercalation drops rapidly with the number of times cycled. Both exp...