article · RSC Advances
Researchers developed a method to grow melamine-glutaraldehyde polymer microspheres directly onto three-dimensional nickel foam. This in situ synthesis technique forms precursors that are subsequently carbonised at 400 °C, 500 °C, or 700 °C to yield nitrogen-doped carbon. Directly growing the polymer on the nickel foam enhances electrochemical properties without requiring extra binders or conductive additives during electrode preparation. The composite carbonised at 400 °C delivered a specific capacitance of 297 F g-1 at a current density of 1 A g-1. Furthermore, the electrode demonstrated strong cycling stability, retaining 90% of its initial capacitance after 5,000 cycles. The improved electrochemical performance is linked to the rapid movement of ions to the electrode surface, which promotes straightforward redox reactions.
Supercapacitors are energy storage devices that charge rapidly and offer long lifespans. Typical manufacturing processes often require binders and conductive additives to prepare electrodes, which can add complexity and lower efficiency. By growing active nitrogen-doped carbon structures directly onto nickel foam, this approach simplifies electrode fabrication while ensuring rapid ion movement and durable energy storage over thousands of operational cycles.
The method could enable simpler electrode manufacturing for energy storage devices such as supercapacitors. Potential users include manufacturers of energy storage components seeking binder-free electrode designs. Based on the abstract, this represents early-stage laboratory research focused on material synthesis and initial electrochemical testing, meaning further development and scale-up testing would be necessary before industrial application.
AI-generated from the published abstract. Always read the original work before citing.
An <i>in situ</i> synthesis approach is used to directly grow a microsphere of melamine-glutaraldehyde (MAGA) polymer over three-dimensional (3D) nickel foam (NF). The materials are used to produce nitrogen-doped carbon (NC) with and without NF. These precursors undergo carbonization at various temperatures, namely 400 °C, 500 °C, and 700 °C. The electrochemical properties of the materials would be significantly improved by directly growing MAGA polymer on the surface of NF. The electrochemical performance of NC/NF-400 was excellent, with a capacitance of 297 F g<sup>-1</sup> achieved at a current density of 1 A g<sup>-1</sup>. The <i>in situ</i> growing approach does not necessitate the use of additional chemical agents, such as binders or conductive compounds when preparing the electrode. In addition, the material exhibits only 10% reduction in capacitance after undergoing 5000 cycles, indicating excellent cycling performance. The outstanding electrochemical performance achieved by using the <i>in situ</i> method of MAGA microsphere polymer on NF may be attributed to the rapid transit of ions to the electrode surfaces, facilitating effortless redox reactions.
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DOI: 10.1039/d3ra08489b
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