106 research outputs found

    The γ'-V2O5 Polymorph as an Attractive 2D Cathodic Material for Lithium and Sodium-Ion Batteries

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    Lithium-ion batteries (LIBs) have been the subject of intense research due to their high energy density and good cycling performance. However, considering the low natural occurrence of Li in the upper continental crust (≈ 35 ppm), great concerns have been expressed over whether the available lithium reserves in the earth will be sufficient to meet the ever-growing requirements for LIB

    One-step hydrothermal synthesis of graphene decorated V2O5 nanobelts for enhanced electrochemical energy storage

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    Graphene-decorated V2O5 nanobelts (GVNBs) were synthesized via a low-temperature hydrothermal method in a single step. V2O5 nanobelts (VNBs) were formed in the presence of graphene oxide, a mild oxidant, which also enhanced the conductivity of GVNBs. From the electron energy loss spectroscopy analysis, the reduced graphene oxide (rGO) are inserted into the layered crystal structure of V2O5 nanobelts, which further confirmed the enhanced conductivity of the nanobelts. The electrochemical energy-storage capacity of GVNBs was investigated for supercapacitor applications. The specific capacitance of GVNBs was evaluated using cyclic voltammetry (CV) and charge/discharge (CD) studies. The GVNBs having V2O5-rich composite, namely, V(3)G(1) (VO/GO = 3:1), showed superior specific capacitance in comparison to the other composites (V(1)G(1) and V(1)G(3)) and the pure materials. Moreover, the V(3)G(1) composite showed excellent cyclic stability and the capacitance retention of about 82% was observed even after 5000 cycles.open

    The γ'-V2O5 Polymorph as an Attractive 2D Cathodic Material for Lithium and Sodium-Ion Batteries

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    Lithium-ion batteries (LIBs) have been the subject of intense research due to their high energy density and good cycling performance. However, considering the low natural occurrence of Li in the upper continental crust (≈ 35 ppm), great concerns have been expressed over whether the available lithium reserves in the earth will be sufficient to meet the ever-growing requirements for LIB
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