A grid for an absorbent glass mat lead acid battery is also disclosed. The grid has a frame formed of a top frame element having a current collection lug, a first side frame element, a second side frame element, and a bottom frame element. A plurality of grid wires are arranged in radial configuration within the frame which radial configuration emanates from a radiant point located outside a boundary of the frame. A plurality of horizontal grid wires cross the plurality of grid wires arranged the radial configuration. The grid comprises virgin lead or high purity lead or highly purified secondary lead. An absorbent glass mat lead acid battery is also disclosed.

A cylindrical secondary battery and a method for manufacturing the same are provided. The cylindrical secondary battery includes a negative electrode having no negative electrode active material layer, and thus a large-scale cylindrical secondary battery having a high energy density, improved cell performance, and ensured safety can be provided.

Provided is a stacked electrode assembly including: a lowermost electrode arranged on a lowermost portion of the stacked electrode assembly; an uppermost electrode arranged on an uppermost portion of the stacked electrode assembly; at least one unit stacked body arranged between the lowermost electrode and the uppermost electrode and including a positive electrode, a negative electrode, and a separator, the separator being arranged between the positive electrode and the negative electrode; and a separator arranged between the lowermost electrode and the at least one unit stacked body, and between the at least one unit stacked body and the uppermost electrode. A capacity and energy density of a lithium battery may be improved by employing an electrode including a mesh electrode current collector as the lowermost electrode or the uppermost electrode of the stacked electrode assembly.

In an embodiment, a Li-ion battery cell comprises an anode electrode with an electrode coating that (1) comprises Si-comprising active material particles, (2) exhibits an areal capacity loading in the range of about 3 mAh/cm.sup.2 to about 12 mAh/cm.sup.2, (3) exhibits a volumetric capacity in the range from about 600 mAh/cc to about 1800 mAh/cc in a charged state of the cell, (4) comprises conductive additive material particles, and (5) comprises a polymer binder that is configured to bind the Si-comprising active material particles and the conductive additive material particles together to stabilize the anode electrode against volume expansion during the one or more charge-discharge cycles of the battery cell while maintaining the electrical connection between the metal current collector and the Si-comprising active material particles.

A method of manufacturing a battery cell includes layering electrode sheets in a layering direction. The electrode sheets each have an electrode placed in a container and a current collector that is connected to the electrode in the container and protrudes to the outside through an opening of the container. The method also includes applying pressure and heat to a resin placed between the current collector and the current collector layered on each other from outer sides toward a center in the layering direction. The melted resin is caused to flow through a through hole formed in the current collector in the layering direction and fill the through hole. The resin is welded between the current collector and the current collector and sealing the opening of the container.

An electrode assembly includes an electrode having a laminated foil disposed between a first active material layer and a second active material layer, where the laminated foil includes a polymer substrate disposed between a first laminate layer and a second laminate layer. The electrode assembly also includes a plurality of perforations extending through the first active material layer, the second active material layer, and the laminated foil.