A battery includes a first current collector, a first electrode layer, and a first counter electrode layer. The first counter electrode layer is a counter electrode of the first electrode layer, and the first current collector includes a first electroconductive portion, a second electroconductive portion, and a first insulating portion. The first electrode layer is disposed in contact with the first electroconductive portion, and the first counter electrode layer is disposed in contact with the second electroconductive portion. The first insulating portion links the first electroconductive portion and the second electroconductive portion, and the first current collector is folded at the first insulating portion, whereby the first electrode layer and the first counter electrode layer are positioned facing each other.

Presented are stacked electrode designs for electrochemical devices, methods for making/using such electrochemical devices, and lithium-class cylindrical and prismatic battery cells with stacked electrode architectures. An electrochemical device employs multiple first (e.g., anode) electrodes and multiple second (e.g., cathode) electrodes, each of which includes an active (anode/cathode) electrode material borne by an electrode body and a flexible tab projecting from the electrode body. Multiple electrically insulating separators are interleaved between and stacked along a central stack axis with the electrodes to define an electrode stack. A first electrically conductive current collector fully or partially surrounds the electrode stack and interference fits with the electrode tabs of the first electrodes to electrically connect thereto. A second electrically conductive current collector is disposed inside the first current collector, aligned substantially parallel with the central stack axis, and interference fit with the electrode tabs of the second electrodes to electrically connect thereto.

Presented are stacked electrode designs for electrochemical devices, methods for making/using such electrochemical devices, and lithium-class cylindrical and prismatic battery cells with stacked electrode architectures. An electrochemical device employs multiple first (e.g., anode) electrodes and multiple second (e.g., cathode) electrodes, each of which includes an active (anode/cathode) electrode material borne by an electrode body and a flexible tab projecting from the electrode body. Multiple electrically insulating separators are interleaved between and stacked along a central stack axis with the electrodes to define an electrode stack. A first electrically conductive current collector fully or partially surrounds the electrode stack and interference fits with the electrode tabs of the first electrodes to electrically connect thereto. A second electrically conductive current collector is disposed inside the first current collector, aligned substantially parallel with the central stack axis, and interference fit with the electrode tabs of the second electrodes to electrically connect thereto.

An electrochemical device having a roll with elongated electrodes each supported in one of two alternating folds of a separator layer, and spirally wound in the roll with the separator layer to define two opposing ends, each of such ends only exposing a different one of the electrodes wound along the roll. The device having a disc shaped housing having upper and lower portions fixable to each other to set the device height. The upper portion provides a first member with a first surface disposed along one end of the roll. A second member with a second surface is disposed along the other end of the roll. Spring elements compressed between the second member and a third member, provided by the housing lower portion, apply pressure to force the second member toward the first member promoting contact of the first and second surfaces with different ones of the exposed electrodes.

The present invention provides a secondary battery that has high energy density, high capacity, excellent cycle characteristics, and high productivity. The present invention relates to a secondary battery including: a laminate formed by alternately folding a sheet at an acute angle a plurality of times, the sheet having a negative electrode that is free of a negative electrode active material, and separators or solid electrolytes disposed on both surfaces of the negative electrode; and a plurality of positive electrodes each disposed in a space between separators or solid electrolytes facing each other formed by folding the sheet.

Set forth herein are electrochemical cells which include a negative electrode current collector, a lithium metal negative electrode, an oxide electrolyte membrane, a bonding agent layer, a positive electrode, and a positive electrode current collector. The bonding agent layer advantageously lowers the interfacial impedance of the oxide electrolyte at least at the positive electrode interface and also optionally acts as an adhesive between the solid electrolyte separator and the positive electrode interface. Also set forth herein are methods of making these bonding agent layers including, but not limited to, methods of preparing and depositing precursor solutions which form these bonding agent layers. Set forth herein, additionally, are methods of using these electrochemical cells.

Set forth herein are electrochemical cells which include a negative electrode current collector, a lithium metal negative electrode, an oxide electrolyte membrane, a bonding agent layer, a positive electrode, and a positive electrode current collector. The bonding agent layer advantageously lowers the interfacial impedance of the oxide electrolyte at least at the positive electrode interface and also optionally acts as an adhesive between the solid electrolyte separator and the positive electrode interface. Also set forth herein are methods of making these bonding agent layers including, but not limited to, methods of preparing and depositing precursor solutions which form these bonding agent layers. Set forth herein, additionally, are methods of using these electrochemical cells.

A secondary battery that comprises an adhesive that is provided to at least one thickness-direction side surface of separators between the separators and first electrodes (negative electrodes). When the adhesive force between a separator and the outermost first electrode (negative electrode) is A0 and the adhesive force between a separator and the first electrode (negative electrode) tint is in the center of the laminate in the layering direction is A1 [N/m] A1/A0 is at least 0.1 but less than 0.9.

A secondary battery is provided. The secondary battery comprises a positive electrode, a solid electrolyte, and a negative electrode, wherein: a stack structure comprising the positive electrode and the solid electrolyte stacked together is provided; the stack structure is bent to provide a bending region therebetween; and the negative electrode is provided within the bending region.

A secondary battery is provided. The secondary battery comprises a positive electrode, a solid electrolyte, and a negative electrode, wherein: a stack structure comprising the positive electrode and the solid electrolyte stacked together is provided; the stack structure is bent to provide a bending region therebetween; and the negative electrode is provided within the bending region.