In:
Collection of Czechoslovak Chemical Communications, Institute of Organic Chemistry & Biochemistry, Vol. 54, No. 6 ( 1989), p. 1482-1495
Abstract:
The morphology, electrochemical and electrical properties of polyacetylene films, prepared with a catalytic system titanium tetrabutoxide/ethylmagnesium bromide in two forms–non-dried porous and dried compact ones–were studied. The properties of non-dried porous films as positive electrodes in lithium cells were characterized by means of cyclic voltammetry, electrochemical impedance measurements, galvanostatic cycling and “in situ” resistance measurements. The electrical conductivity of undoped dried compact films was 10 -7 to 10 -6 S m -1 depending on the oxygen content. Iodine doping increased the conductivity of these films up to σ = 7·6.10 3 S m -1 , the conductivity of the trans -isomer (CHI 0.27 ) x increased up to σ = 3.3.10 3 S m -1 . From the temperature dependence of the electrical conductivity we have concluded that the transport of charge carriers is due presumably to the variable-range, phonon-assisted hopping of carriers between localized states, the density distribution function of which is not constant around the Fermi level.
Type of Medium:
Online Resource
ISSN:
0010-0765
,
1212-6950
DOI:
10.1135/cccc19891482
Language:
English
Publisher:
Institute of Organic Chemistry & Biochemistry
Publication Date:
1989
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