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Dual Behaviour of Amorphous Carbon Released Electrochemically from Graphite
Author(s) -
Oliveira Maria C.,
Viana Ana S.,
Botelho do Rego Ana M.,
Ferraria Ana M.,
Tavares Pedro B.,
Veloso Andreia D.,
Videira Romeu A.
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600965
Subject(s) - materials science , graphite , electrode , electrolyte , amorphous solid , capacitive sensing , amorphous carbon , polarization (electrochemistry) , chemical engineering , anode , delocalized electron , carbon fibers , inorganic chemistry , composite material , chemistry , organic chemistry , electrical engineering , composite number , engineering
Here we show that the main product released from graphite in the early stages of the anodic polarization is a carbon‐based salt comprised of an amorphous carbonaceous material with delocalized negative charge, counterbalanced by sodium cations. Remarkably, this material shows a dual behaviour: it behaves as an electrolyte in aqueous medium, which has the ability to enhance the capacitive properties of the electrode‐solution interface and in the solid state it can be used as an electrode material with meaningful capacitive properties.