ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 10, pp. 1637−1642. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © R.D. Apostolova, R.P. Peskov, O.V. Kolomoets,
2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 10, pp. 1454−1459.
AND CORROSION PROTECTION OF METALS
Enhancing the Efﬁ ciency of Using Electroplated Iron
and Cobalt Sulﬁ des with a Sublayer of NiC Composite
in a Lithium Battery
R. D. Apostolova, R. P. Peskov, and O. V. Kolomoets
Ukrainian State University of Chemical Technology, pr. Gagarina 8, Dnepropetrovsk, 49005 Ukraine
Received September 18, 2015
Abstract—The efﬁ ciency of using in a lithium battery transition metal sulﬁ des electroplated on a metal support
strongly depends on the kind and relief of the support. To make the nickel support rougher for enhancing the
adhesion of sulﬁ des, it was electroplated with a nickel–carbon composite, NiC. The discharge capacity and the
efﬁ ciency of cycling of iron and cobalt sulﬁ des electroplated with a NiC sublayer were higher than in the case
when the sulﬁ des were electroplated on a smooth nickel support without composite coating.
Increasing consumption of micrometric electronic
devices (smart cards, microsensors, microrobots, etc.)
and the demand for them in the modern society make
it necessary to increase the production of micrometric
power sources. Thin-ﬁ lm electrodes required for them
can be prepared by different methods, which should
meet the following requirements: low cost, technical
simplicity, environmental safety, and high deposition
rate. The electrolytic method for preparing a number of
transition metal compounds meets these requirements.
Metal oxides (M = V, Co, Ni, Mo) and sulﬁ des (М =
Fe, Cо, Ni, Mo), suitable for thin-ﬁ lm lithium batteries,
have been synthesized by electrolysis [1–4].
Electrochemical transformation of electrolytically
obtained electrode materials and the operation life of
lithium batteries based on them depend on the kind
of the support material and on the topography of the
support surface. Electrode materials can be deposited
by electrolysis on aluminum and stainless steel as the
most corrosion-resistant structural materials for lithium
current sources [5, 6]. However, the deposits formed on
a smooth aluminum surface exhibit insufﬁ cient adhesion
to the support. This is caused by gradual loss of the
discharge capacity of the lithium battery in the course of
cycling. To enhance the adhesion, the aluminum support
was preliminarily treated in a KOH solution to make
the surface rougher. A procedure of zincate activation
of the surface was suggested for the deposition of metal
sulﬁ des on a thin aluminum foil; it allows successful use
of a support as thin as 10 μm .
There has been good experience in using thin-ﬁ lm
metal sulﬁ de electrodes on aluminum support in a model
lithium battery at a discharge to 1.1 V, but these electrodes
cannot be used in negative electrodes for lithium–ion bat-
teries operating in the range of potentials in which alumi-
num is electrochemically active in the reaction with lith-
ium. Metal sulﬁ des are deposited for these electrodes on
stainless steel, in particular, on 18Ni12Cr9Ti steel gauze.
The efﬁ ciency of the electrochemical transformation of
metal sulﬁ des on steel gauze in a lithium battery can be
enhanced by electrolytic inclusion of graphite particles in
the precipitate of metal sulﬁ des . Deposition of metal
sulﬁ des on a smooth plate of 18Ni12Cr9Ti steel does not
allow reaching strong adhesion of the deposit to the sup-
port, ensuring stable discharge capacity at prolonged cy-
cling of the battery.
In this study, for the electrolytic synthesis of iron and
cobalt sulﬁ des we used for the ﬁ rst time a nickel support