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Hierarchical porous carbon microspheres derived from porous starch for use in high-rate electrochemical double-layer capacitors.

Abstract：

:Porous starch was used as a precursor for hierarchical porous carbon microspheres. The preparation consisted of stabilisation, carbonisation and KOH activation, and the resultant hierarchical porous carbon microspheres had a large BET surface area of 3251 m(2)g(-1). Due to the large surface area and the hierarchical pore structure, electrodes made of the hierarchical porous carbon microsphere materials had high specific capacitances of 304 Fg(-1) at a current density of 0.05 Ag(-1) and 197 Fg(-1) at a current density of 180 Ag(-1) when used in a symmetric capacitor with 6M KOH as the electrolyte. After 10,000 cycles, the capacitor still exhibited a stable performance with a capacitance retention of 98%. These results indicate that porous starch is an excellent precursor to prepare high performance electrode materials for EDLCs.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Du SH,Wang LQ,Fu XT,Chen MM,Wang CY

doi

10.1016/j.biortech.2013.04.085

subject

Has Abstract

pub_date

2013-07-01 00:00:00

pages

406-9

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(13)00708-6

journal_volume

139

pub_type

杂志文章

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