e-journal

High capacitance electrode materials based on layered double hydroxides prepared by non-aqueous precipitation

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Abstract.
Supercapacitors that have been actively sought for electricity storage and many metal oxides/hydroxides, including transition metal-containing layered double hydroxides (LDHs), have been widely investigated. In this research, Co- or Mn-containing LDHs were prepared through precipitation in methanol, followed by the hydrothermal treatment and dispersion in water. As-prepared LDHs showed a relatively high capacitance
(13–140 F g−1) at the scanning rate of 1 mV s−1 and a current load of 20 mA g−1 using 6 M KOH as an electrolyte. Calcination of LDHs at 400 °C (e.g. LDOs) normally enhances the exposure of electrochemical active
species, but can lead to an increase or a decrease of the specific surface area, with a specific capacitance of
50–210 F g−1. We have also noted that the capacitance of both LDOs and LDHs remains stable after
100–500 cycles. The possible mechanism of electron transfer was considered based on the cyclic
voltammograms and physicochemical features of LDHs and LDOs.

Keywords:
Layered double hydroxides (LDHs)
Supercapacitors
Electroactive species
Capacitance
Stability
Cyclic voltammetry

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Informasi Detail

Judul Seri

Applied Clay Science

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Applied Clay Science 74 (2013) 102–108

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

74 (2013)

Subjek

POROUS-CAPASITANCE

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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