Porous carbon made from rice husk as electrode material for electrochemical double layer capacitor

Yu Gao, Lei Li, Yuming Jin, Yu Wang, Chuanjun Yuan, Yingjin Wei, Gang Chen, Junjie Ge and Haiyan Lu

Applied Energy, 2015, vol. 153, issue C, 47 pages

Abstract: Rice husks were converted into activated carbon by KOH activation, at temperatures between 400 and 900°C and used in a two-electrode supercapacitor. The rice husks contain SiO2 nano-crystals surrounded by an amorphous carbon matrix. The activated carbons maintained their size and shape after the synthesis process and the ordering degree of carbon increased at elevated temperatures. The highest BET surface area of the activated carbons was around 3145m2g−1. Electrochemical properties of the studied samples were measured using a two electrode cell in 6M KOH and 1.5M tetraethylammonium tetrafluoroborate in acetonitrile. The material synthesized at 800°C showed the highest gravimetric capacitance performance of 367Fg−1and 174Fg−1 in aqueous and organic electrolytes, respectively. In contrast to the commercial activated carbons, rice husk activated carbon (RHAC), this material showed excellent high-power handling ability and electrochemical cycle performance, after 30000 cycles the capacitive value almost remained unchanged.

Keywords: Porous carbon; Rice husk; KOH-activation; Cycle-life; Supercapacitors (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261914013270
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:appene:v:153:y:2015:i:c:p:41-47

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2014.12.070

Access Statistics for this article

Applied Energy is currently edited by J. Yan

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