An alkaline secondary battery disclosed in the present application includes a positive electrode containing a positive electrode active material, a negative electrode, and a separator. The positive electrode active material contains a mixture of a silver oxide and a silver-bismuth complex oxide. A discharge curve is obtained when the battery that is fully charged is discharged with a constant current until a battery voltage drops to 1.0 V. The battery voltage at a point on the discharge curve where x (%) of a total discharge capacity has been discharged from the battery since start of discharge is represented by V.sub.x (V). The discharge curve satisfies V.sub.10V.sub.700.08, has a step in the range of 70x90, and shows that a size of the step represented by V.sub.70V.sub.90 is 0.04 or more and 0.15 or less.

An alkaline secondary battery disclosed in the present application includes a positive electrode containing a positive electrode active material, a negative electrode, and a separator. The positive electrode active material contains a mixture of a silver oxide and a silver-bismuth complex oxide. A discharge curve is obtained when the battery that is fully charged is discharged with a constant current until a battery voltage drops to 1.0 V. The battery voltage at a point on the discharge curve where x (%) of a total discharge capacity has been discharged from the battery since start of discharge is represented by V.sub.x (V). The discharge curve satisfies V.sub.10V.sub.700.08, has a step in the range of 70x90, and shows that a size of the step represented by V.sub.70V.sub.90 is 0.04 or more and 0.15 or less.

Separator and electrolyte composites include a porous self-supporting separator film between or adjacent one or two electrolyte films. The electrolyte films may contain a glyme or mixture of glymes, LiX salt and complexing agent, such as PEO. The porous self-supporting separator film may be used dry or wetted with a liquid electrolyte composition. Solid state batteries include the described separator and electrolyte composites in combination with an anode and a cathode.

Separator and electrolyte composites include a porous self-supporting separator film between or adjacent one or two electrolyte films. The electrolyte films may contain a glyme or mixture of glymes, LiX salt and complexing agent, such as PEO. The porous self-supporting separator film may be used dry or wetted with a liquid electrolyte composition. Solid state batteries include the described separator and electrolyte composites in combination with an anode and a cathode.

Fabricating the electrode blank includes baking a blank precursor. The blank precursor contains the components of an electrode active medium including an active material. Fabricating the electrode blank also includes performing one or more post-bake calender operations on the blank precursor after baking the blank precursor. Each post-bake calender operation includes calendering the blank precursor.

Fabricating the electrode blank includes baking a blank precursor. The blank precursor contains the components of an electrode active medium including an active material. Fabricating the electrode blank also includes performing one or more post-bake calender operations on the blank precursor after baking the blank precursor. Each post-bake calender operation includes calendering the blank precursor.

A method of fabricating a battery electrode includes forming a mixture including an electrode material and a binder; forming an electrode blank from the mixture; heating the electrode blank at a predetermined temperature for a predetermined time to form an annealed electrode blank; and laminating the annealed electrode blank to a current collector. The current collector may include a conductive carbon coating. In such event, the method may further include heating the current collector at a selected temperature for a selected time prior to laminating the annealed electrode blank to the current collector.

A method of fabricating a battery electrode includes forming a mixture including an electrode material and a binder; forming an electrode blank from the mixture; heating the electrode blank at a predetermined temperature for a predetermined time to form an annealed electrode blank; and laminating the annealed electrode blank to a current collector. The current collector may include a conductive carbon coating. In such event, the method may further include heating the current collector at a selected temperature for a selected time prior to laminating the annealed electrode blank to the current collector.

Separator and electrolyte composites include a porous self-supporting separator film between or adjacent one or two electrolyte films. The electrolyte films may contain a glyme or mixture of glymes, LiX salt and complexing agent, such as PEO. The porous self-supporting separator film may be used dry or wetted with a liquid electrolyte composition. Solid state batteries include the described separator and electrolyte composites in combination with an anode and a cathode.

Separator and electrolyte composites include a porous self-supporting separator film between or adjacent one or two electrolyte films. The electrolyte films may contain a glyme or mixture of glymes, LiX salt and complexing agent, such as PEO. The porous self-supporting separator film may be used dry or wetted with a liquid electrolyte composition. Solid state batteries include the described separator and electrolyte composites in combination with an anode and a cathode.