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

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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 m2 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 F g-1 at a current density of 0.05 A g-1 and 197 F g-1 at a current density of
180 A g-1 when used in a symmetric capacitor with 6 M 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.

Keywords:
Porous starch
Hierarchical porous carbon microspheres
Electric double layer capacitors
High rate

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Informasi Detail

Judul Seri

Bioresource Technology

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2013

Deskripsi Fisik

Bioresource Technology 139 (2013) 406–409

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

139 (2013)

Subjek

POROUS-CAPASITANCE

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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