e-journal

Uniaxially oriented carbon monoliths as supercapacitor electrodes

---

a b s t r a c t
Cylindrical carbon monoliths of 7mmin diameter and certain heights (1, 2, 3, 4 and 5mm) are studied as
model electrodes for supercapacitors. The monoliths show a narrow microporous structure with average
micropore size of 0.73nmand specific surface area of 1086m2 g−1. The monoliths show straight walls and
channels, both arranged along the cylinder axis. The former account for a remarkable electrical conductivity (6.5 Scm−1 at room temperature). The latter allow a rapid ionic transport between the electrolyte bulk and the carbon walls and account for a high specific capacitance at high current density. The cell capacitance and resistance increase linearly with the monolith height according to C = (1.78±0.06)h and ESR = (0.08±0.01)h + (1.67±0.04), respectively. The contribution of the electrolyte resistance, monolith resistance and monolith/collector resistance to ESR is discussed. The cell response time or constant time increases with the monolith height but according to a power dependence, τ = (4.5±0.2)h(1.61±0.03). The carbon of the monoliths show in KOH electrolyte a specific capacitance of 150 F g−1 and a capacitance per surface area of 14μFcm−2.
Keywords: Carbon, Monoliths, Electrodes, Supercapacitors, EDLC

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

-

Penerbit

: Elsevier Ltd. All rights reserved., 2010

Deskripsi Fisik

Electrochimica Acta 55 (2010) 8539–8544

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA KARBON

Info Detail Spesifik

-

Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar