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Capacitive behavior of amorphous and crystalline RuO2 composite electrode fabricated by spark plasma sintering technique

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Abstract.
This study is intended to determine if the capacitive properties are improved when a specific amount
of crystalline ruthenium oxide (c-RuO2) is added to an amorphous hydrous ruthenium oxide (a-RuO2)
electrode fabricated by the spark plasma sintering technique. For at the cyclic voltammetry scan rates
higher than 10 mV s−1, the capacitance of a highly pseudo-capacitive, but less electron-conductive a-
RuO2 electrode is augmented by adding 5–20 wt.% of c-RuO2 which is less capacitive, but more electronconductive
than a-RuO2. The capacitance fades when more than 20 wt.% of c-RuO2 is added because
the less capacitive nature of c-RuO2 prevails. The proximate cause of this phenomenon is the electronic
conductivity, , of the composite electrode as we observe a maximum in  at around a 5–20 wt.% c-RuO2
content. The fact that c-RuO2 is composed of smaller particles than a-RuO2 seems to be related to the
maximum  value for a certain c-RuO2 content of the composite electrode.

Keywords: Pseudocapacitor; Amorphous ruthenium oxide; Crystalline ruthenium oxide; Electronic conductivity; Spark plasma sintering

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2011

Deskripsi Fisik

Journal of Power Sources 196 (2011) 7878– 7881

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

196 (2011)

Subjek

PSEUDOKAPASITOR

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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