Details

Autor(en) / Beteiligte

• Fan, Yang
• Yang, Xin
• Zhu, Bing
• Liu, Pei-Fang
• Lu, Hai-Ting

Titel

Micro-mesoporous carbon spheres derived from carrageenan as electrode material for supercapacitors

Ist Teil von

• Journal of power sources, 2014-12, Vol.268, p.584-590

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The polysaccharide carrageenan is used as a natural precursor to prepare micro-mesoporous carbon spheres. The carbon spheres were synthesized by hydrothermal carbonization of carrageenan, and subsequent chemical activation by KOH at different temperatures. The obtained micro-mesoporous carbon spheres have high surface area (up to 2502 m2 g−1) and large pore volume (up to 1.43 cm3 g−1). Moreover, the micro- and mesoporosity can be finely tuned be modifying the activation temperatures in the range of 700–900 °C. The carbon spheres activated at 900 °C present high specific capacitance of 230 F g−1 at a current density of 1 A g−1 and good ion transport kinetics. The good capacitive performance can be ascribed to the high specific surface area, well-controlled micro- and mesoporosity and narrow pore size distribution. •Carrageenan was used as a natural precursor to prepare porous carbon spheres.•The carbon spheres have high surface area of 2502 m2 g−1.•The carbon spheres possess well-controlled micro- and mesoporosity.•The micro-mesoporous carbon spheres exhibited superior capacitive performance.