MnO2 nanoneedles loaded on silicon oxycarbide-derived hierarchically porous carbon for supercapacitor electrodes with enhanced electrochemical performance
Source abstract
Abstract
Abstract Manganese oxide nanoneedle/carbide-derived carbon (MnO2/CDC) composite electrodes with hierarchically porous structure for supercapacitors have been obtained by a convenient hydrothermal technology. MnO2 nanoneedles are homogeneously grown on the surface of CDC obtained by etching silicon oxycarbide (SiOC) using sodium hydroxide (NaOH) according to a self-limiting reaction. The as-prepared MnO2/CDC composites possess large specific surface area of 1749.3 m2 g−1, and facilitate to the enhancement of some certain pseudocapacitance. The MnO2/CDC composite electrodes show a high specific capacitance (255.8 F g−1 at 1 A g−1) in a three-electrode system. Additionally, MnO2/CDC electrodes are used to fabricate a symmetrical coin cell supercapacitor. The device delivers the remarkable energy density of 12.6 Wh kg−1 at a power density of 3997.7 W kg−1 and still maintain 92.2% of the capacitance after 2000 cycles. The electrode materials prepared by combining CDC with transition metal oxide have great potential in supercapacitor applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Electrochemical sensors and biosensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
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