An all-solid lithium ion secondary battery includes a pair of electrodes and a solid electrolyte provided between the pair of electrodes. At least one of the pair of electrodes includes an active-material layer and an intermediate layer. An active material constituting the active-material layer has a core-shell structure which has a core region and a shell region and a composition of the intermediate layer is intermediate between the solid electrolyte and the shell region.

An electrode assembly according to an embodiment of the present invention for achieving the above object comprises: a first electrode formed in the form of a single sheet and repetitively in-folded and out-folded at a predetermined interval; a second electrode formed into a plurality of pieces and respectively interposed in spaces formed by folding the first electrode; and a separator formed in the form of a single sheet and interposed between the first electrode and the second electrode so as to be repetitively in-folded and out-folded at a predetermined interval together with the first electrode, wherein the first electrode is a single-sided electrode in which a first electrode active material is applied to only one surface of a first electrode collector, and the second electrode is a double-sided electrode in which a second electrode active material is applied to all both surfaces of a second electrode collector.

An electrode assembly according to an embodiment of the present invention for achieving the above object comprises: a first electrode formed in the form of a single sheet and repetitively in-folded and out-folded at a predetermined interval; a second electrode formed into a plurality of pieces and respectively interposed in spaces formed by folding the first electrode; and a separator formed in the form of a single sheet and interposed between the first electrode and the second electrode so as to be repetitively in-folded and out-folded at a predetermined interval together with the first electrode, wherein the first electrode is a single-sided electrode in which a first electrode active material is applied to only one surface of a first electrode collector, and the second electrode is a double-sided electrode in which a second electrode active material is applied to all both surfaces of a second electrode collector.

A battery including a separator film, a plurality of cathodes, each having a cathode base, a first end of each cathode base having a cathode connection portion extending contiguously across the width of the cathode base and free of a cathode material, the battery including a plurality of anodes, each having an anode base, a first end of each anode base having an anode connection portion extending contiguously across the width of the anode base and free of an anode material, and the anode connection portion. The cathodes and anodes are in an electrode stack with alternating anodes and cathodes and each separated by a portion of the separator film. Each cathode connection portion of each cathode connected to a bus bar at a first end of the battery, and each anode connection portion electrically connected to a bus bar disposed at a second end of the battery.

The disclosure provides a laminated battery that can realize a laminated structure in which electrode composite material portions are not displaced, can simplify the manufacturing process, and has improved production yield, and provides a manufacturing method thereof. A positive electrode structure and a negative electrode structure in comb shapes are respectively produced with electrode composite material layers positioned in advance, and these are fitted to produce a laminate serving as a battery.

The disclosure provides a laminated battery that can realize a laminated structure in which electrode composite material portions are not displaced, can simplify the manufacturing process, and has improved production yield, and provides a manufacturing method thereof. A positive electrode structure and a negative electrode structure in comb shapes are respectively produced with electrode composite material layers positioned in advance, and these are fitted to produce a laminate serving as a battery.

A unit cell includes an electrode positioned between a first separator and a separator in a stack. A first adhesive is positioned between the electrode and at least one of the first and second separators, and a second adhesive is positioned between the first separator and the second separator. A shear strength of the first adhesive is less than or equal to a shear strength of the second adhesive.

A unit cell includes an electrode positioned between a first separator and a separator in a stack. A first adhesive is positioned between the electrode and at least one of the first and second separators, and a second adhesive is positioned between the first separator and the second separator. A shear strength of the first adhesive is less than or equal to a shear strength of the second adhesive.

A method for producing a lithium-ion cell is provided. The electrochemically active coating of an electrode is brought into contact with an electrolyte or an auxiliary liquid before a winding or cutting operation. This method is suitable in particular for continuously producing lithium-ion cells by means of processes proceeding at high speed, such as winding processes.

A method for producing a lithium-ion cell is provided. The electrochemically active coating of an electrode is brought into contact with an electrolyte or an auxiliary liquid before a winding or cutting operation. This method is suitable in particular for continuously producing lithium-ion cells by means of processes proceeding at high speed, such as winding processes.