Cobalt–Nickel Vanadate Nanonest Colonies Deposited Carbon Fabric as a Bifunctional Electrode for Li-Ion Batteries and Oxygen-Evolution Reactions
Sale Chandra Sekhar, Bhimanaboina Ramulu, Shaik Junied Arbaz, Manchi Nagaraju, Jae Su Yu
Cobalt–Nickel Vanadate Nanonest Colonies Deposited Carbon Fabric as a Bifunctional Electrode for Li-Ion Batteries and Oxygen-Evolution Reactions
Transition metal vanadates (TMVs) have attracted significant attention in various research fields owing to their advantageous features. Furthermore, synthesizing TMVs directly on current collectors at the nanoscale is a promising strategy for achieving better performance. Herein, cobalt–nickel vanadate (CoV2O6–Ni2V2O7, CNV) was directly grown on carbon fabric using a facile one-step hydrothermal method. In particular, the CNV sample prepared for 3 h (CNV-3) exhibited a benefit-enriched nanonest-colony morphology in which abundant nanowires (diameter: 10 nm) were intertwined, providing sufficient space for electrolyte diffusion. All the CNV electrodes exhibited good cycling performance in the lithium-ion battery study. Especially, the CNV-3 electrode retained higher discharge and charge capacities of 616 and 610 mAh g−1, respectively at the 100th cycle than the other two electrodes owing to several morphologic features. The electrocatalytic activity of all the CNV samples for the oxygen-evolution reaction (OER) was also explored in an alkaline electrolyte. Among these CNV catalysts, the CNV-3 displayed excellent OER performance and required an overpotential of only 270 mV to drive a current density of 10 mA cm−2. The Tafel slope of this catalyst was also found to be low (129 mV dec−1). Moreover, the catalyst exhibited excellent durability in a 24 h stability test. These results indicate that the metal vanadates with favorable nanostructures are highly suitable for both energy storage and water-splitting applications.
CoV2O6–Ni2V2O7 material grown directly on carbon fabric as novel nanonest colonies demonstrated stable electrochemical response in both lithium-ion battery and oxygen-evolution reaction studies
Cobalt–nickel vanadates / One-step hydrothermal / Nanonest colonies / Li-ion battery / Oxygen-evolution reaction
[1] |
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[2] |
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[3] |
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
|
[16] |
|
[17] |
|
[18] |
|
[19] |
|
[20] |
|
[21] |
|
[22] |
|
[23] |
|
[24] |
|
[25] |
|
[26] |
|
[27] |
|
[28] |
|
[29] |
|
[30] |
|
[31] |
|
[32] |
|
[33] |
|
[34] |
|
[35] |
|
[36] |
|
[37] |
|
[38] |
|
[39] |
|
[40] |
|
[41] |
|
[42] |
|
[43] |
|
[44] |
|
[45] |
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