e-journal

Carbon Electrode Material with High Densities of Energy and Power

---

Abstract
Activated carbon (AC) samples as electrode materials were prepared by means of simultaneous physical-chemical activation using walnut shells as precursors. The porosity and surface chemistry of the resultant AC samples were studied by the nitrogen adsorption at 77 K, and FTIR spectrum. The testing supercapacitors were assembled with resultant carbon electrode and electrolyte of 6 mol·L−1 KOH solution. Their electrochemical properties were investigated by charge-discharge of constant current,
cyclic voltammogram, impedance spectrum and so on. The results showed that the capacitor had low inner resistance, low leakage current, high stability, and capacitance retainability. The specific capacitance of AC increased with increasing BET specific surface area. The specific capacitance of the AC sample with a specific area of 1197 m2·g−1 could be as high as 292 F·g−1. At a discharge current of 80 mA, the corresponding specific energy density, power density, and maximum power of the supercapacitor are 7.3
Wh·kg−1, 770 W·kg−1, and 5.1 W·g−1, respectively.
Key Words: Activated carbon; Activation; Functional group; Electrode material; Supercapacitor

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

ACTA PHYSICO-CHIMICA SINICA

No. Panggil

-

Penerbit

: Elsevier BV. All rights reserved., 2008

Deskripsi Fisik

ACTA PHYSICO-CHIMICA SINICA Volume 24, Issue 1, January 2008

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar