Microporous and Mesoporous Materials
Microporous and Mesoporous Materials
4 years ago

Promising carbon nanosheet-based supercapacitor electrode materials from low-grade coals

Promising carbon nanosheet-based supercapacitor electrode materials from low-grade coals
The abundantly available low-grade coals were efficiently used to produce supercapacitor electrode materials by using wet-chemical methods. The low-grade coals were first chemically converted to graphene-like carbon nanosheets (GCNSs), and then their electrochemical parameters were extensively investigated to know their basic supercapacitor properties. The formation of the GCNSs was established by using scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopic (XPS) techniques. The carbon flakes of the size range of 2–50 μm were found to present in the coal-derived carbon nanomaterials. HRTEM analysis revealed the formation of layered GCNSs along with micropores/mesopores during the oxidative processes. The thermally stabled coal-derived GCNSs were found as promising electrode materials for supercapacitor demonstrating novel charge storage characteristics. The specific capacitance value of ∼125, 84 and 95 F g−1 with high rate capability over 1000 cycles were observed in an acidic electrolyte (H2SO4 1M) with considerably high power density and energy density.

Publisher URL: www.sciencedirect.com/science

DOI: S138718111730433X

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.