e-journal

Effect of ball milling on electrochemical characteristics of walnut shell-based carbon electrodes for EDLCs

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Abstract.
Walnut shell-based activated carbons (WS-ACs) were prepared by chemical activation with KOH and
used as an electrode material for electrical double layer capacitors (EDLCs). The WS-AC samples were
characterized before and after ball milling for 8 h to assess their electrochemical characteristics as carbon
electrodes for EDLCs. Nitrogen adsorption analyses showed that the Brunauer–Emmett–Teller (BET) surface
areas of the WS-ACs were decreased to approximately 10% of their original value after ball milling.
However, their capacitances were slightly increased and their other electrochemical properties such as
impedance and charge/discharge stability were improved. Pore size distribution analysis revealed that
whereas most of the micropores were destroyed, a considerable number of mesopores in the size range
of 2–10 nm were formed by ball milling. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis
confirmed a 10% increase in the graphite content after ball milling.

Keywords: Walnut shell-based carbon; Ball milling effect; Electrical double layer capacitors (EDLCs); Chemical activation; Mesoporous media

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Ketersediaan

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Informasi Detail

Judul Seri

Microporous and Mesoporous Materials

No. Panggil

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Penerbit

New York : Elsevier Inc.., 2012

Deskripsi Fisik

Microporous and Mesoporous Materials 155 (2012) 274–280

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

155 (2012)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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