Unlocking the electrochemical potential of carbon aerogels: Tailored performance via controlled carbonization and activation process

Ashwini V. Patil, Sunny R. Gurav, Rajendra G. Sonkawade and Rajiv S. Vhatkar

Energy, 2024, vol. 307, issue C

Abstract: In this study, Carbon Aerogels (CAs) were prepared by high-temperature supercritical drying (HTSD) in ethanol for supercapacitors (SCs). HTSD eliminates the acetone-liquid CO2 exchange step and offers a time-efficient alternative to traditional liquid CO2 drying methods. This study investigated the effect of varying carbonization temperatures (600, 700, 800, and 900 °C) on resorcinol-formaldehyde aerogel and assessed their impact on structural, morphological, compositional, and surface area properties. Amongst, CA carbonized at 700 °C (CA-7) exhibited superior performance with a specific capacitance (Cs) of 78 F/g, energy density (Ed) of 39 Wh/kg at 2 A/g in 1 M Na2SO4. After KOH activation, CA-7 demonstrated two-fold enhancement in Cs (184 F/g at 2 A/g) and three-fold in Ed (93 Wh/kg) while maintaining 98 % capacitance retention over 7000 cycles. The symmetric aqueous device (ACA\SSM||ACA\SSM) exhibited a Cs of 32 F/g, Ed of 25 Wh/kg, Pd of 2308 W/kg, and 88.6 % retention over 2500 cycles at 2.4 V. This research highlights the advantages of HTSD-based CA synthesis and the potential of activated CA and Na2SO4 to achieve high Ed for SCs.

Keywords: Aerogel; Resorcinol- formaldehyde gel; Carbonization; High-temperature supercritical drying; Supercapacitor (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054422402245X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:307:y:2024:i:c:s036054422402245x

DOI: 10.1016/j.energy.2024.132471

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().