A stack-type electrode assembly includes a lowermost electrode in a lowermost portion of the electrode assembly; an uppermost electrode in an uppermost portion of the electrode assembly; at least one unit stack between the lowermost electrode and the uppermost electrode, the at least one unit stack comprising a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; and a plurality of separators between the lowermost electrode and unit stack, between the unit stacks, and between the unit stack and the uppermost electrode.

The present invention provides a terminal assembly, and storage batteries comprising a terminal assembly, wherein the terminal assembly comprises a conductive cup-shaped member comprising a terminal wall in electric communication with a terminal of the electrochemical cell when the terminal wall is in contact with the terminal; a sidewall; and a rim separated from the terminal wall by the sidewall; and a bipolar endplate having first and second surfaces parallel with the terminal wall and joining to the rim at the first surface, the joining enabling bi-directional uniform current flow through the cup-shaped member between the terminal and the endplate when the terminal wall is in contact with the terminal, the endplate having an electrochemically active region comprising a first surface area enclosed by the rim and a remaining second surface area outside an outer periphery of the rim, the first and second surface areas being substantially equal.

A battery is provided which includes a first power generating element, a second power generating element, and a first adhesion layer adhering the first power generating element to the second power generating element. A first positive electrode collector of the first power generating element and a second negative electrode collector of the second power generating element face each other with (i.e., via) the first adhesion layer. Between the first positive electrode collector and the second negative electrode collector, the first adhesion layer is disposed in a region forming a first positive electrode active material layer or a region forming a second negative electrode active material layer, whichever is smaller. The first positive electrode collector and the second negative electrode collector are not in contact with each other in a region in which the first positive electrode active material layer and the second negative electrode active material layer face each other.

An example includes a method including forming a battery electrode by disposing an active material coating onto a silicon substrate, assembling the battery electrode into a stack of battery electrodes, the battery electrode separated from other battery electrodes by a separator, disposing the stack in a housing, filling the interior space with electrolyte, and sealing the housing to resist the flow of electrolyte from the interior space.

A bipolar electrode is composed of a first active material layer which is, for example, a positive electrode active material layer formed to include a first active material on one side of a collector, and a second active material layer which is, for example, a negative electrode active material layer formed to include a second active material with less compressive strength than that of the first active material on the other side of the collector. Then, a density adjusting additive which is an additive material with larger compressive strength than that of the second active material is included in the second active material layer.

The present invention provides an aqueous electrolyte for use in rechargeable zinc-halide storage batteries that possesses improved stability and durability and improves zinc-halide battery performance. One aspect of the present invention provides an electrolyte for use in a secondary zinc bromine electrochemical cell comprising from about 30 wt % to about 40 wt % of ZnBr.sub.2 by weight of the electrolyte; from about 5 wt % to about 15 wt % of KBr; from about 5 wt % to about 15 wt % of KCl; and one or more quaternary ammonium agents, wherein the electrolyte comprises from about 0.5 wt % to about 10 wt % of the one or more quaternary ammonium agents.

Provided is a lithium ion secondary battery including: a positive electrode having a positive electrode active material layer disposed on a positive electrode current collector; a negative electrode having a negative electrode active material layer disposed on a negative electrode current collector; and an electrolyte solution. The positive electrode active material layer includes a positive electrode active material containing a lithium nickel composite oxide. The positive electrode contains an alkaline component by less than 1% relative to a weight of the positive electrode active material. The electrolyte solution includes an additive containing a cyclic carbonate additive with an unsaturated bond. A molar ratio of the cyclic carbonate additive with an unsaturated bond relative to a total molar amount of the additive is 78% or less.

A secondary battery for cycling between a charged and a discharged state, wherein a 2D map of the median vertical position of the first opposing vertical end surface of the electrode active material in the X-Z plane, along the length L.sub.E of the electrode active material layer, traces a first vertical end surface plot, E.sub.VP1, a 2D map of the median vertical position of the first opposing vertical end surface of the counter-electrode active material layer in the X-Z plane, along the length L.sub.C of the counter-electrode active material layer, traces a first vertical end surface plot, CE.sub.VP1, wherein for at least 60% of the length L.sub.c of the first counter-electrode active material layer (i) the absolute value of a separation distance, S.sub.Z1, between the plots E.sub.VP1 and CE.sub.VP1 measured in the vertical direction is 1000 ?m?|S.sub.Z1|?5 ?m.

The current collector plate arrangement structure of the bipolar solid-state battery includes a battery cell stack formed by stacking a plurality of solid-state battery cells each including a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer and in contact with the positive electrode active material layer and the negative electrode active material layer. The bipolar solid-state battery includes a positive electrode current collector and a negative electrode current collector on a side surface with respect to a stacking direction. Current collector plates and of the solid-state battery cells are arranged on at least one of a front surface serving as one end surface in the stacking direction and a rear surface serving as the other end surface in the stacking direction.

A battery has: an electrode body; positive and negative electrode foils provided at surfaces of the electrode body; a metal exterior body pair formed from a positive electrode metal exterior body that contacts the positive electrode foil and a negative electrode metal exterior body that contacts the negative electrode foil; and resins that fix the electrode body and metal exterior body pair. Outer surfaces of the metal exterior body pair are exposed to enable electrical connection with an exterior. At least one of the positive or negative electrode metal exterior bodies is shaped as a box having a bottom plate that is quadrilateral and four side plates that each share one side with the bottom plate, and accommodates the electrode body at an inner side of the box shape. The positive and negative electrode metal exterior bodies and side surfaces of the electrode body are respectively insulated by the resins.