e-journal

Effect of molecular grafting on the pore size distribution and the double layer capacitance of activated carbon for electrochemical double layer capacitors

---

Abstract.
High specific surface carbon (Black Pearls 2000) has been modified by electroactive
anthraquinone (AQ) groups by spontaneous reduction of the corresponding in situ generated
diazonium derivative. A set of modified carbons with different AQ loadings have been
synthesized to study the effect of the grafted groups on the pore texture and on the double
layer capacitance of the modified carbons. Grafting of a small amount of AQ molecules
caused a significant loss of the BET surface area and affected mainly the ultramicroporosity
of the carbon powder. A correlation of the pore texture with the electrochemical data
allows to conclude that pores smaller than 0.65 nm do not significantly contribute to the
double layer capacitance in H2SO4 electrolyte and therefore are not efficiently accessible
to the ions of this electrolyte. Above an AQ loading of 7 wt.%, both microporosity and
mesoporosity are strongly affected but the decrease of double layer capacitance seems to
be directly related to the coverage of the carbon surface by AQ molecules.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

CARBON

No. Panggil

-

Penerbit

New York : Elsevier Ltd.., 2011

Deskripsi Fisik

CARBON 49 (2011) 1340 –1348

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

49 (2011)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar