Journal
APPLIED CLAY SCIENCE
Volume 50, Issue 3, Pages 367-375Publisher
ELSEVIER
DOI: 10.1016/j.clay.2010.08.030
Keywords
Layered double hydroxide; Molecule intercalation; Carbon replica; Cyclic voltammetry; Electrochemical impedance spectroscopy
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Carbon composites and replicas were prepared from layered double hydroxide (organo-LDH) intercalated with carbon 3-sulfopropylmethacrylic acid (SPMA) After intercalation the organo-LDHs were calcined and acid-leached Carbonization and acid-leaching were followed by in situ XRD Raman spectroscopy and observed by scanning electron microscopy The pore formation in the carbon replica was studied by nitrogen adsorption Electrochemical processes were studied by varying the potential scan rate and the Faraday contribution was evaluated The electrochemical impedance spectroscopy of the carbon composite indicated the conductivity and embedded inorganic redox centers In comparison carbon from SPMA had a capacitance as high as 280 F/g in aqueous Na2SO3 solution corresponding to an electric energy of 47 5 W h kg(-1) and a power density of 17 3 kW kg(-1) (Delta V = 1 1 V at 2 mV s(-1)) These properties were explained on the basis of electrochemically fully exposed surfaces as well as large amounts of oxygen surface groups (C) 2010 Elsevier B V All rights reserved
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