Abstract Nanoflakes of α‐Fe 2 O 3 were prepared on Cu foil by using a thermal treatment method. The nanoflakes characterized X‐ray diffraction, scanning electron microscopy, high‐resolution transmission and Raman spectroscopy. reversible Li‐cycling properties the have been evaluated cyclic voltammery, galvanostatic discharge–charge cycling, impedance spectral measurements cells with Li metal as counter reference electrodes, at ambient temperature. Results show that Fe exhibit stable capacity...

We report the fabrication of vertically aligned NiO nanowalls on nickel foils using a plasma assisted oxidation method. Electrochemical properties as-synthesized were evaluated by galvanostatic cycling and cyclic voltammetery. The results show capacity ∼638 (mA h)/g (at 1.25C rate), with excellent retention up to 85 cycles, when cycled in range, 0.005−3.0 V vs Li. superior electrochemical performance comparison previously reported nanosized particles can be attributed its large surface area...

Metal sulfides, known as being analogous to metal oxides, have emerged a new class of materials for energy conversion and/or storage applications due their low cost and high electrochemical activity.

Polymorphs of 1D nanostructures niobium pentoxide (Nb2O5) are synthesized by electrospinning. Pseudohexagonal (H−Nb2O5), orthorhombic (O−Nb2O5), and monoclinic (M−Nb2O5) structures Nb2O5 developed in this study appropriate heat treatment. Morphological, structural, electrochemical properties these nanofibrous polymorphs studied detail. The H− O− phases maintain the usual fibrous morphology, whereas M− phase adopted a distorted nugget structure. These evaluated for their application as...

Abstract We report an efficient method to synthesize vertically aligned Co 3 O 4 nanostructures on the surface of cobalt foils. This synthesis is accomplished by simply heating foils in presence oxygen gas. The resultant morphologies can be tailored either one‐dimensional nanowires or two‐dimensional nanowalls controlling reactivity and diffusion rate species during growth process. A possible mechanism governing formation such discussed. field‐emission properties as‐synthesized are...

In this work, the electrochemical performance of NiFe2O4 nanofibers synthesized by an electrospinning approach have been discussed in detail. Lithium storage properties are evaluated and compared with nanoparticles galvanostatic cycling cyclic voltammetry studies, both half-cell configurations. Nanofibers exhibit a higher charge-storage capacity 1000 mAh g–1 even after 100 cycles high Coulmbic efficiency % between 10 cycles. Ex situ microscopy studies confirmed that cycled nanofiber...

α-Fe2O3 nanorods are synthesized by electrospinning of polyvinylpyrrolidone (PVP)/ferric acetyl acetonate (Fe(acac)3) composite precursors and subsequent annealing at 500 °C for 5 h. X-ray diffraction Raman spectroscopy analyses confirm the formation a hematite structure as predominant phase. The electron microscopy studies show that electrospun composed agglomerates nano-sized particles average diameter is found to be 150 nm. Li-storage cycling properties examined galvanostatic in voltage...

Lithium iron phosphate, LiFePO4 (LFP), is considered to be a potential cathode material for lithium-ion batteries but its rate performance significantly restricted by sluggish kinetics of electrons and lithium ions. A simple solvothermal method has been described in this article synthesize carbon coated LFP (LFP/C) nanoplates with varying thickness from 20 500 nm using different precursors. The influence solvents on the morphology synthesis also investigated. uniform coverage at surfaces...

The Pechini type polymerizable complex decomposition method is employed to prepare LiTi2(PO4)3 at 1000 °C in air. High energy ball milling followed by carbon coating the glucose-method yielded C-coated nano-LiTi2(PO4)3 (LTP) with a crystallite size of 80(±5) nm. phase characterized X-ray diffraction, Rietveld refinement, thermogravimetry, SEM, HR-TEM and Raman spectra. Lithium cycling properties LTP show that 1.75 moles Li (∼121 mA h g−1 15 current) per formula unit can be reversibly cycled...

Herein, we report the facile synthesis of two α-Fe2O3 nanostructures with different morphologies via an electrospinning technique using ferric acetyl acetonate as a precursor and polyvinyl acetate pyrrolidone respective polymers. The as-electrospun metal oxide–polymer composite fibers were sintered at 500 °C to obtain distinct nanostructures, denoted nanograins porous throughout this manuscript. These crystalline characterized powder X-ray diffraction (XRD), Raman spectroscopy, scanning...

The compounds, CoN, CoO, and Co3O4 were prepared in the form of nano-rod/particles we investigated Li-cycling properties, their use as an anode material. urea combustion method, nitridation, carbothermal reduction methods adopted to prepare Co3O4, respectively. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission (TEM), Brunauer–Emmett–Teller (BET) surface density used characterise materials. Cyclic voltammetry (CV) was performed galvanostatic cycling tests also...

The morphology of electrode materials is addressed as a key factor controlling rapid lithium storage in anisotropic systems such LiFePO4. In view this, we have synthesized nanoplates LiFePO4 with uniform coating 5 nm thick amorphous carbon layer by the solvothermal method and investigated their electrochemical behavior. obtained are well characterized XRPD, SEM, HRTEM XPS techniques. thickness along b-axis found to be 30–40 nm; favors short diffusion lengths for Li+ ions, while external...

Nanowires of Nb2O5 were developed in three polymorphic forms, namely, pseudo-hexagonal, orthorhombic, and monoclinic, by electrospinning a polymeric solution subsequent annealing. The materials characterized X-ray electron diffraction, scanning transmission microscopy, BET surface area measurements, absorption spectrometry, cyclic voltammometry. These characterizations indicate that the monoclinic phase has higher conduction band edge compared with other two is likely to display open circuit...

Interconnected networks of CoMoO(4) submicrometer particles are prepared by thermolysis polymer matrix based metal precursor solution. The material exhibited a high reversible capacity 990 (±10) mAh g(-1) at current density 100 mA g(-1), with 100% retention between 5 and 50 cycles. improved electrochemical performance interconnected network like morphology makes it promising as high-capacity anode for rechargeable lithium ion batteries.

Vanadium antimony tin oxide, M (micron size)-(V1/2Sb1/2Sn)O4 with tetragonal rutile structure is prepared for the first time. The N (nanosize, 10–20 nm)-analogue obtained by high energy ball milling of above. They are characterized Rietveld refinement X-ray diffraction data, resolution transmission electron microscopy (HR-TEM), selected area (SAED), density and BET surface studies. Li-cycling properties were studied at ambient temperature (24 °C) 54 °C galvanostatic discharge–charge cycling...