In the search of new materials for future generation Li-ion batteries, a look into past has brought multicationic oxide Rb2TiNb6O18 to foreground. Structural characterization this material been carried out thanks combination XRD, SEM and HRTEM highlighting complex structure material. Ion exchange was performed in order replace rubidium ions by hydrated protons. Then, comparative study obtained ...

The application of solid polymer electrolytes (SPEs) is severely impeded by the insufficient ionic conductivity and low Li+ transference numbers (tLi+). Here, we report an iodine-driven strategy to address both two long-standing issues SPEs simultaneously. Electronegative iodine-containing groups introduced on chains effectively attract ions, facilitate transport, promote dissociation Li salts....

Cobalt-doped tungsten disulfide nanorods were synthesized by an approach involving exfoliation, intercalation, and the hydrothermal process, using commercial WS2 powder as the precursor and n-butyllithium as the exfoliating reagent. XRD results indicate that the crystal phase of the sample is 2H-WS2. TEM images show that the sample consists of bamboo-like nanorods with a diameter of around 20 n...

We present an in situ approach for the characterization of lithium intercalation/deintercalation in thinfilm Li-ion battery electrodes. The method allows simultaneous measurement of microstructural changes during lithiation using micro-Raman (mRaman) spectroscopy in parallel with stress changes via optical interferometry. We observe evolution in the microstructure and stress in the various crys...

We have studied stability of lithium-manganese oxides using density functional theory in the local density and generalized gradient approximation ~GGA!. In particular, the effect of spin-polarization and magnetic ordering on the relative stability of various structures is investigated. At all lithium compositions the effect of spin polarization is large, although it does not affect different st...

Since the rechargeable Li-ion battery was invented in early 1990s, its performance has evolved continually and batteries are now installed most mobile devices. In these batteries, graphite is used as a negative electrode material. However, detailed reaction mechanism between Li remains unclear. Here we apply synchrotron X-ray diffraction, 7 Li-nuclear magnetic resonance Raman spectroscopy to op...

Magnesium hydroxide is a commodity chemical, produced in almost pure form from seawater through precipitation. Even though Li brines contain high concentrations of Mg2+ cations, the precipitation Mg(OH)2 them not common. Rather it typically coprecipitated with other salts and becomes waste. The crystallization chemical-grade Li+ rich brine that contained 3.1 g/L 1.3 Li+, was investigated by mea...

A systematic hybrid density functional theory study on the electronic and vibrational properties of MxCoO2 compounds with M = Li, Na x 0,0.5,1 is reported. The used DFT-PBE0 method describes structural parameters studied well in comparison to experimental data. All magnetic species are treated as ferromagnets Co(IV) atoms possess a moment 1.2 μB. At 0 K, CoO 2 favors monoclinic structure very c...

Core-shell composite structures are potential candidates for Li-ion battery electrodes as they can take advantage of materials with higher energy density and materials with higher cyclability. This paper derives an analytical solution for isotropic 1-dimensional diffusion with galvanostatic boundary condition in composite slab, cylinder and sphere using separation of variables method. A general...

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...