Preparation of lignin-based carbon aerogels as biomaterials for nano-supercapacitor

Bong Suk Yang, Kyu Young Kang, Myung Joon Jeong

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Kraft and organosolv lignins, generally produced in chemical pulping and bio-refinery processes of lignocellulosic biomass, were used to prepare lignin-based carbon aerogels for supercapacitors as raw materials. The difference between lignins and lignin-based aerogels were compared by analyzing physical and chemical properties, including molecular weight, polydispersity, and reactivity with formaldehyde. Also, density, shrinkage, Brunauer-Emmett-Teller (BET) surface area and scanning electron microscope (SEM) images of the lignin-based aerogel were investigated. Kraft lignin consisting of coniferyl alcohol (G) and p-coumaryl alcohol (H) increased the reactivity of formaldehyde, formed a hydrogel well (porosity > 0.45), and specific surface area higher than organosolv lignin. In the case of kraft lignin, there were irregular changes such as oxidation and condensation in the pulping process. However, reaction sites with aromatic rings in lignin impacted the production of aerogel and required a long gelation period. The molecular weight of lignin influences the gelation time in producing lignin-based aerogel, and lignin composition affects the BET surface area and pore structures of the lignin-based carbon aerogels.

Original languageEnglish
Pages (from-to)478-482
Number of pages5
JournalJournal of the Korean Physical Society
Volume71
Issue number8
DOIs
StatePublished - 1 Oct 2017

Keywords

  • BET surface area
  • Carbon aerogel
  • Kraft lignin
  • Lignin composition
  • Organosolv lignin

Fingerprint

Dive into the research topics of 'Preparation of lignin-based carbon aerogels as biomaterials for nano-supercapacitor'. Together they form a unique fingerprint.

Cite this