Method and set for producing a zinc-manganese dioxide cell, and cell produced using said method

2:

• The method of claim 1, wherein at least one of:
• the separator is a porous plastic film or a porous nonwoven,
• the separator has a thickness in a range of 60 to 120 μm,
• the separator has a porosity in a range of 35% to 60%, and/or
• the separator comprises a polyolefin.

3:

• The method according to claim 1, wherein at least one of:
• the mineral particles are selected from the group consisting of:
• ceramic particles, salt particles that are nearly or completely insoluble in water, glass particles, and particles of natural minerals and stones,
• CaCO3 particles are used as the mineral particles,
• the mineral particles have a d50 value in a range of 0.8 μm to 40 μm,
• the paste for preparing the at least one electrolyte layer is essentially free of mineral particles with a particle size >80 μm,
• the paste for preparing the at least one electrolyte layer comprises at least one additive,
• an additive to adjust viscosity, the paste for preparing the at least one electrolyte layer comprises a mineral powder with a mean particle size (d50)<500 nm,
• water is used as the solvent and/or dispersant,
• an amount of the at least one zinc salt in the paste is not less than 25% by weight and not more than 50% by weight, and/or
• a paste for preparing the at least one electrolyte layer comprises the following components, the proportions of the components of the paste adding up to 100% by weight:
• the at least one water-soluble, chloride-free conducting salt in a proportion of 30-40 wt. %,
• an additive for viscosity adjustment in a proportion of 2-4 wt. %,
• mineral particles in a proportion of 10-30 wt. %,
• solvent and/or dispersant in a proportion of 40-55 wt. %, and
• the proportions of the components of the paste adding up to 100% by weight.

4:

• The method according to claim 1, wherein at least one of:
• the paste for the preparation of the negative electrode comprises the zinc powder in a proportion of at least 50% by weight,
• the zinc powder has a d50 value in a range of 20 μm to 40 μm,
• the paste for preparing the negative electrode comprises at least one additive,
• the paste comprises carboxy methyl cellulose as an additive to adjust viscosity,
• the paste for preparing the negative electrode comprises the electrode binder in a range of 1 wt. % to 10 wt. %,
• the paste for preparing the negative electrode comprises an electrode binder with elastic properties,
• water is used as solvent and/or dispersant, and/or
• the paste for preparing the negative electrode comprises the following components, the proportions of the components of the paste adding up to 100% by weight:
• zinc powder (mercury-free) in a proportion of 65-79 wt. %,
• an additive for viscosity adjustment in a proportion of 1-5 wt. %,
• an elastic binder in a proportion of 5-10 wt. %, and
• solvent and/or dispersant in a proportion of 15-20 wt. %.

5:

• The method according to claim 1, wherein at least one of:
• the paste for the preparation of the positive electrode comprises the manganese dioxide in a proportion of at least 50 wt %,
• the manganese dioxide is present in particulate form and has a d50 value in a range of 20 μm and 50 μm,
• the paste for preparing the positive electrode comprises at least one additive,
• the paste comprises carboxy methyl cellulose as an additive to adjust viscosity,
• the paste for the preparation of the positive electrode comprises the electrode binder in a range of 5 wt. % to 15 wt. %,
• the paste for preparing the positive electrode comprises an electrode binder with elastic properties,
• the paste for preparing the positive electrode comprises the conductivity agent in a proportion of 5 wt % to 35 wt %,
• the positive electrode fabrication paste comprises, as a conductivity agent, at least one conductive material selected from the group consisting of:
• activated carbon, activated carbon fiber, carbide-derived carbon, carbon aerogel, graphite, graphene, and carbon nanotubes (CNTs),
• water is used as solvent and/or dispersant, and/or
• the paste for preparing the positive electrode comprises the following components the proportions of the components adding up to 100% by weight:
• manganese dioxide in a proportion of 50-70 wt. %,
• a conductivity agent in a proportion of 3-30 wt. %,
• an additive for viscosity adjustment in a proportion of 2-8 wt. %,
• an elastic electrode binder in a proportion of 8-15% by weight, and
• solvent and/or dispersant in a proportion of 20-30 wt. %.

6:

• The method according to claim 1, wherein at least one of:
• the electrodes and the at least one electrolyte layer are formed by a printing process,
• the negative electrode is formed with an average thickness in a range of 30 μm to 150 μm,
• the positive electrode is formed with an average thickness in a range of 13 μm to 350 μm,
• the at least one electrolyte layer is formed with an average thickness in a range of 10 to 100 μm.
• the at least one electrolyte layer is applied to the negative and/or the positive electrode while it is still at least wet, and/or
• the separator is placed on one of the electrolyte layers formed while it is still at least wet.

7:

• A set for the preparation of a zinc-manganese dioxide cell, the set comprising:
• a paste for preparing a negative electrode, the paste comprising:
• zinc powder (mercury free), electrode binder, and solvent and/or dispersant;
• a paste for preparing a positive electrode, the paste comprising:
• manganese dioxide, a conductivity agent to improve electrical conductivity, an electrode binder, a solvent and/or dispersant;
• and
• a paste for preparing an electrolyte layer, the paste comprising:
• the at least one water-soluble, chloride-free conducting salt, mineral particles, and solvent and/or dispersant.

8:

• The set according to claim 7, further comprising a separator for a zinc-manganese dioxide cell, wherein the separator:
• is a porous plastic film or a porous nonwoven;
• has a thickness in a range of 60 to 120 μm,
• has a porosity in a range of 35% to 60%, and
• comprises a polyolefin.

9:

• A zinc-manganese dioxide cell, comprising:
• a first electrical conductor disposed on an electrically non-conductive substrate;
• a second electrical conductor disposed on the electrically non-conductive substrate;
• a layer-shaped negative electrode disposed directly on the first electrical conductor;
• a layer-shaped positive electrode disposed directly on the second electrical conductor;
• and
• a layer-shaped separator;
• wherein the electrodes and the separator are formed as a layer stack with the sequence negative electrode/separator/positive electrode, in which the negative electrode and the separator as well as the positive electrode and the separator are each connected to one another via an interface:
• wherein the electrodes and the separator are impregnated with a zinc salt solution, and
• wherein the interfaces between the electrodes and the separator are include mineral particles that form a boundary layer permeable to the electrolyte.

10:

• The zinc-manganese dioxide cell according to claim 9, wherein at least one of:
• the negative electrode of the cell comprises the following components:
• zinc powder (mercury-free) in a proportion of 81 to 93 wt. %,
• an additive for viscosity adjustment in a proportion of 1 to 7% by weight, and
• an electrode binder in a proportion of 6 to 13 wt. %;
• the positive electrode of the cell comprises the following components:
• manganese dioxide in a proportion of 62-82 wt. %,
• a conductivity agent in a proportion of 5-35 wt. %,
• an additive for viscosity adjustment in a proportion of 2-10% by weight, and
• an electrode binder in a proportion of 6-13 wt. %.

11:

• The zinc-manganese dioxide cell according to claim 9, wherein at least one of:
• the mineral particles are selected from the group consisting of:
• ceramic particles, salt particles that are nearly or completely insoluble in water, glass particles, and particles of natural minerals and stones,
• CaCO3 particles are used as mineral particles,
• the mineral particles have a d50 value in a range of 0.8 μm to 40 μm, and/or
• the boundary layer comprises a mineral particle with a mean particle size (d50)<500 nm.