ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 10, pp. 1711−1717. © Pleiades Publishing, Ltd., 2015.
Electrochemical Performance of γMnO
from the Active Mass of Used Batteries
, A. Bouzid
, N. Chelali
, and L. Zerroual
Laboratoire Matériaux et Systèmes Electroniques (LMSE), Faculté des Sciences et Technologie,
Université de B.B. Arreridj-Route d’El Annasser, 34000, Algérie
Laboratoire d’Energétique et D’électrochimie du solide, Université de Sétif-1, Sétif 19000, Algérie
Received September 18, 2015
Abstract—We prepared MnO
by electrolysis of manganese sulfate solution recovered from used batteries and
commercial manganese sulfate solution. The comparative study of the two samples using electrochemical tech-
niques in alkaline solution shows that the two samples exhibit the same behavior. From XRD, we identiﬁ ed and
indexed both samples by γMnO
orthorhombic structure. We estimated the proton diffusion coefﬁ cient using
galvanostatic intermittent titration technique (GITT). Our calculated data are in good agreement with theoretical
values for both samples. In addition TG analysis shows the same thermal proﬁ le for both samples.
Batteries represent in term of heavy metal an important
environmental pollutant , and are used in electronic
devices as cellular phones, computers and video recorder.
The development of recycling batteries [2−4] processes
is convenient for economic and environmental reasons
such as high coast, waste recycling and natural resources
conservation. Various methods were developed to
recover used batteries, in particular, pyrometallurgical
and hydrometallurgical processes [5−8]. Comparatively
with the thermal process, the hydrometallurgical and
electrochemical processes are complete recovery of metal
with high purity, low energy requirement, avoidance of
air emissions and minimization of waste water [9−12].
For the hydrometallurgical treatment of spent batteries,
the solid material is mostly leached and dissolved in
acid medium such as nitric acid, sulfuric acid or their
mixtures [5−8]. Then, it is processed to recover the metal
ions. The experimental approach used in this study is to
produce leach liquor from saline and alkaline Leclanchй
cells to obtain the MnSO
solutions Manganese dioxide
exists in different allotropic crystallographic varieties.
It is the main compound of the cathode of saline and
cells . The cathode of these
cells, consists generally of a mixture of chemical and
in different proportion depending
on the companies recipes and formula. Once discharged
these cells still contain active γMnO
The main purpose of this work consists of the
elaboration of new materials from piles users and
environmental protection from special waste and to
recover manganese dioxide from used batteries. The
material is chemically converted to Mn
solution [14, 15]
then crystallized as manganese sulfate salt . Finally
is prepared by electrolysis of MnSO
The different samples were characterized by X-ray
diffraction analysis to determine the phase composition,
the structure, the texture, the lattice parameters and the
grains size. The electrochemical activity of γMnO
compared to that obtained from Prolabo product MnSo
solution in the same conditions in alkaline medium.
Linear sweep voltametry, galvanostatic discharge and
impedance spectroscopy were used as techniques of
investigation. The value of diffusion coefﬁ cient of proton
[17, 18] is estimated by the Galvanostatic Intermittent
Titration Technique (GITT) .
The text was submitted by the authors in English.