Year: 1887

page_text: Date of Application, 2nd June, 1887.
Complete Left, 5th Sept., 1887
Complete Accepted, 7th Oct., 1887.
I, LOUIS CHARLES EMILE LEBIEZ, of 77, Avenue de Saint Ouen, Paris, in the
French Republic, Electrician, do hereby declare the nature of my invention to be as
follows:-
My Invention consists in depositing by Electrolysis on the positive Electrodes of
Accumulators or Secondary Batteries a pulverulent coating of peroxide of manganese
obtained from a solution of any appropriate Salt of this metal, such as the Sulphate or
the Chloride.
The positive Electrodes so coated, may be of any suitable conducting material, but
preferably of carbon, and the negative elements may be composed of zinc, or of lead
coated with zinc. The form, dimensions and details of construction of the accumu-
lators may be varied at will, and the exciting liquid may either consist of the solution
of manganese salt already used as electrolyte for the deposit of the peroxide, or of a
fresh solution of the salt so used.
As above stated, any appropriate salt of manganese may be employed for the
purpose of this invention, (and even the alkaline manganates or permanganates), but
as a general rule, I give preference to the sulphate.
When so desired, the chloride of manganese may be substituted for the latter, (and
in certain cases with advantage), but, as its decomposition gives rise to the dis-
engagement of free chlorine, it is less generally applicable.
When this salt (the chloride of manganese) is used, it is advisable to amalgamate
the negative electrodes of the accumulator.

page_text: I, LOUIS CHARLES EMILE LEBIEZ, of 77, Avenue de Saint Ouen, Paris, in the
French Republic, Electrician, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My Invention consists in the formation by Electrolysis on the positive Electrodes
of Accumulators or Secondary Batteries of a pulverulent coating of peroxide of
manganese obtained from a solution of any appropriate Salt of this metal, such as the
Sulphate or the Chloride.
The positive Electrodes so coated, may be of any suitable conducting material, but
preferably of carbon, and the negative elements may be composed of zinc, or of lead
coated with zinc. The form, dimensions and details of construction of the accumu-
lators may be varied at will, and the working charge may either consist of the
solution of manganese salt originally used as electrolyte for the deposit of the peroxide,
or of a fresh solution of the salt so used.
As above stated, any appropriate salt of manganese may be employed for the
purpose of this invention, (and even the alkaline manganates or permanganates), but
as a general rule, I give preference to the sulphate.
In certain cases, the chloride of manganese may be advantageously substituted for
the sulphate; but as its decomposition gives rise to the disengagement of free chlorine,
it is less generally applicable. When this salt (the chloride of manganese) is used, it
is advisable to amalgamate the negative electrodes of the accumulator.
The batteries in which my invention is applied, present (among others) the
following advantages:
1.-Rapid formation of the oxide coating.
2. Indefinite duration of the positive Electrodes, when made of carbon or other
inoxidable substance.
3. Reduction in weight and bulk of the positive Electrodes, the thickness of which
may be reduced to any extent consistent with the conductibility and rigidity of the
materials of which they may be composed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
The formation by Electrolysis on the positive Electrodes of Secondary Batteries or
Accumulators, of a pulverulent coating of peroxide of manganese obtained by the use
of an Electrolyte or charging solution of any appropriate salt of that metal,
substantially as herein set forth.
Dated this 5th day of September 1887.
PHILIP M. JUSTICE,
Associate Agent.