An alkaline dry battery includes a battery case, a hollow cylindrical positive electrode accommodated in the battery case, a negative electrode disposed in the hollow portion of the positive electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolytic solution contained in the positive electrode, the negative electrode and the separator. The alkaline dry battery further includes a layer principally including a compound containing a polyoxyethylene group between the positive electrode and the inner surface of the battery case.

A resin sealing gasket 10 to be incorporated in an alkaline battery 1 housing a power generation element (3 to 5) in a cylindrical battery can 2 closed at a bottom, the sealing gasket configured to insulate a top opening of the battery can and a negative electrode terminal plate 7 from each other. The sealing gasket includes: an outer periphery part 14 standing upward from the rim of a disc-shaped partition part 13; a boss part 11 in a hollow cylindrical shape enabling a rod-shaped negative electrode current collector 6 to stand at the center of the partition part; and a thin-walled portion 15 formed in a groove shape along the outer periphery of the boss part and being thinner than other portions of the partition part.

An electrochemical cell comprises a can comprising a cylindrical side wall extending from a closed end wall. The closed end wall comprises a protrusion. The protrusion has a protrusion cavity therein. A pre-formed pellet of a first electrode material is disposed in the protrusion cavity. The electrochemical cell may further comprise a separator defining an inner cavity and separating the inner cavity from an outer cavity. The outer cavity is defined by the can and the separator. The electrochemical cell may further comprise a first electrode material disposed in the outer cavity; and a second electrode material disposed in the inner cavity.

Alkaline electrochemical cells are provided, wherein dissolved zinc oxide or zinc hydroxide is included at least in the free electrolyte solution, and/or solid zinc oxide or zinc hydroxide is included in the anode, so as to slow formation of a zinc oxide passivation layer on a zinc electrode. Methods for preparing such cells are also provided.

An alkaline electrochemical cell includes a cathode, an anode which includes an anode active material, and a non-conductive separator disposed between the cathode and the anode, wherein from about 20% to about 50% by weight of the anode active material relative to a total amount of anode active material has a particle size of less than about 75 μm, and wherein the separator includes a unitary, cylindrical configuration having an open end, a side wall, and integrally formed closed end disposed distally to the open end.

Various embodiments are directed to an electrochemical cell having a non-homogeneous anode. The electrochemical cell includes a container, a cathode forming a hollow cylinder within the container, an anode positioned within the hollow cylinder of the cathode, and a separator between the cathode and the anode. The anode comprises at least two concentric anode portions, defined by different anode characteristics. For example, the two anode portions may contain different surfactant types, which provides the two anode portions with different charge transfer resistance characteristics. By lowering the charge transfer resistance of a portion of an anode located proximate the current collector of the cell (and away from the separator) relative to an anode portion located adjacent the separator, improved cell discharge performance may be obtained.

An alkaline electrochemical cell includes a cathode, an anode which includes an anode active material, and a non-conductive separator disposed between the cathode and the anode, wherein from about 20% to about 50% by weight of the anode active material relative to a total amount of anode active material has a particle size of less than about 75 μm, and wherein the separator includes a unitary, cylindrical configuration having an open end, a side wall, and integrally formed closed end disposed distally to the open end.

There is provided An inside-out alkaline battery, including: a cylindrical cathode can that has a bottom, that performs a function of a cathode current collector, that has a nickel-plated layer on an inner surface of the cathode can, and that has a coating on a surface layer of the nickel-plated layer, the coating being composed of nickel-cobalt alloy, a thickness of the coating being between 0.15 μm and 0.25 μm (both inclusive), a ratio of cobalt in the nickel-cobalt alloy being between 40% and 60% (both inclusive); and a cathode mixture that is disposed in the cathode can, that is annular in shape, and that contains a cathode active material.

A lithium battery includes a positive electrode designed as a hollow cylinder and defines a cavity, a negative electrode arranged in the cavity, a separator, a liquid electrolyte, a first current collector for the negative electrode, a second current collector for the positive electrode, an at least two-part housing that encloses an interior space in which the positive electrode together with the negative electrode arranged in the cavity and the separator are arranged, wherein a pin is provided as a first current collector inside the housing, a part of the housing serves as a second current collector, the pin has a first, terminal section embedded in the negative electrode and in direct contact with the negative electrode, and the pin has a second section not in direct contact with the negative electrode, and an insulator element that protects the second section at least partially against direct contact with the electrolyte.

Various embodiments are directed to an electrochemical cell having a non-homogeneous anode. The electrochemical cell includes a container, a cathode forming a hollow cylinder within the container, an anode positioned within the hollow cylinder of the cathode, and a separator between the cathode and the anode. The anode comprises at least two concentric anode portions, defined by different anode characteristics. For example, the two anode portions may contain different surfactant types, which provides the two anode portions with different charge transfer resistance characteristics. By lowering the charge transfer resistance of a portion of an anode located proximate the current collector of the cell (and away from the separator) relative to an anode portion located adjacent the separator, improved cell discharge performance may be obtained.