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Preparation of Mn3O4-Fe2O3 Composite Anode via a Molten Salts Technique and Its Application in Lithium-Ion Battery

Abstract

The Mn3O4-Fe2O3 composite was synthesized by a simple molten salts method using commercials MnCl2•2H2O and FeCl2•3H2O as structuring agents. The prepared composite was characterized using different analytical techniques such as Thermogravimetric Analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).

Graphene Anchored with Nanocrystal Fe2O3 with Improved Electrochemical Li-Storage Properties

Abstract

Graphene anchored with nanocrystal Fe2O3 was synthesized by a two-step solvothermal route. The nanocomposite was characterized by X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), scanning electron spectroscopy (SEM) and transmission electron microscopy (TEM). It was found that the Fe2O3 nano-particles were formed and homogeneously anchored on graphene sheets.

Encapsulation of sulfur with thin-layered nickel-based hydroxides for long-cyclic lithium–sulfur cells

Abstract

Elemental sulfur cathodes for lithium/sulfur cells are still in the stage of intensive research due to their unsatisfactory capacity retention and cyclability. The undesired capacity degradation upon cycling originates from gradual diffusion of lithium polysulfides out of the cathode region. To prevent losses of certain intermediate soluble species and extend lifespan of cells, the effective encapsulation of sulfur plays a critical role.

Water soluble binder for fabrication of Li4Ti5O12 electrodes

Abstract

Less expensive and greener aqueous electrode preparation processes are essential for the market penetration of lithium ion batteries to mid-scale applications. So far only carboxyl methyl cellulose (CMC) binder has been adopted for industrial use to fabricate carbon electrodes without harmful organic solvents but this process is prone to bacterial growth.

Unstacked double-layer templated graphene for high-rate lithium–sulphur batteries

Abstract

Preventing the stacking of graphene is essential to exploiting its full potential in energy-storage applications. The introduction of spacers into graphene layers always results in a change in the intrinsic properties of graphene and/or induces complexity at the interfaces.

Solid-state synthesis and electrochemical performance of Li4Ti5O12/graphene composite for lithium-ion batteries

Abstract

Homogeneous Li4Ti5O12/graphene composite is prepared via an in-situ solid state reaction, after carbon pre-coating has been carried out. Its microstructure is compared with the materials prepared by a similar way, but without carbon coating. The results reveal that the carbon coating not only effectively confines aggregation and agglomeration of the Li4Ti5O12 particles, but also enhances the combination between Li4Ti5O12 particles and graphene sheets.

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