The present disclosure is directed to methods and embedding battery tab attachment structures within composites of electrode active materials and carbon nanotubes, which lack binder and lack collector foils, and the resulting self-standing electrodes. Such methods and the resulting self-standing electrodes may facilitate the use of such composites in battery and power applications.

The present disclosure is directed to methods and embedding battery tab attachment structures within composites of electrode active materials and carbon nanotubes, which lack binder and lack collector foils, and the resulting self-standing electrodes. Such methods and the resulting self-standing electrodes may facilitate the use of such composites in battery and power applications.

An active material structure includes first active material lines arranged in a first direction, second active material lines arranged in a second direction intersecting the first direction, and intermediate active material lines between the first active material lines and the second active material lines in a third direction intersecting the first direction and the second direction, the intermediate active material lines provided in overlapping regions of the first active material lines and the second active material lines, wherein the upper active material lines and the second active material lines are electrically connected by the intermediate active material lines.

The invention relates to a grid arrangement for a plate-shaped battery electrode of an electrochemical accumulator having a frame and a grid arranged thereon, wherein the frame comprises at least one upper frame element having a connecting lug of the battery electrode disposed on its side facing away from the grid, and wherein the grid is at least formed by horizontal bars, which are bars extending substantially horizontally, and vertical bars, which are bars extending substantially vertically, wherein at least some of the vertical bars are arranged at different angles to one another in the shape of a fan. The invention further relates to an accumulator.

The invention relates to a grid arrangement for a plate-shaped battery electrode of an electrochemical accumulator having a frame and a grid arranged thereon, wherein the frame comprises at least one upper frame element having a connecting lug of the battery electrode disposed on its side facing away from the grid, and wherein the grid is at least formed by horizontal bars, which are bars extending substantially horizontally, and vertical bars, which are bars extending substantially vertically, wherein at least some of the vertical bars are arranged at different angles to one another in the shape of a fan. The invention further relates to an accumulator.

Disclosed are a composite microstructured current collector for a lithium ion battery and a fabricating method therefor. The composite microstructured current collector comprises a smooth bottom surface (9) and a top surface with a composite microstructure. The top surface comprises micro protrusions (10) and grooves (11), and the micro protrusions (10) are surrounded by the grooves (11). The micro protrusions (10) are provided with concave holes, scaly burrs, and sunken structures. The fabricating method comprises the following steps: (1) design of a cutter and pretreatment of a copper sheet; and (2) processing of a surface microstructure by plowing.

Disclosed are a composite microstructured current collector for a lithium ion battery and a fabricating method therefor. The composite microstructured current collector comprises a smooth bottom surface (9) and a top surface with a composite microstructure. The top surface comprises micro protrusions (10) and grooves (11), and the micro protrusions (10) are surrounded by the grooves (11). The micro protrusions (10) are provided with concave holes, scaly burrs, and sunken structures. The fabricating method comprises the following steps: (1) design of a cutter and pretreatment of a copper sheet; and (2) processing of a surface microstructure by plowing.

At least one embodiment relates to a method fabricating a solid-state battery cell. The method includes forming a plurality of spaced electrically conductive structures on a substrate. Forming the plurality of spaced electrically conductive structures on the substrate includes transforming at least part of a valve metal layer into a template that includes a plurality of spaced channels aligned longitudinally along a first direction. Transforming at least part of the valve metal layer into the template includes a first anodization step, a second anodization step, an etching step in an etching solution, and a deposition step. The method also includes forming a first layer of active electrode material on the plurality of spaced electrically conductive structures, depositing an electrolyte layer over the first layer of active electrode material, and forming a second layer of active electrode material over the electrolyte later.

A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte having lithium-ion conductivity. The positive electrode contains a positive electrode active material containing lithium. The negative electrode faces the positive electrode. The separator is disposed between the positive and negative electrodes. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes a layer and protrusions. The layer has a first surface on which lithium metal is deposited during charge. The protrusions protrude from the first surface. At least one of the protrusions includes a conductive material and an insulative material.

The battery has a header positioned in an opening in a case. An electrode is in the case and a terminal is in electrical communication with the electrode through the header. A cured epoxy contacts the case and the terminal such that the epoxy seals the opening in the case. The header is located between the electrodes and the epoxy. The header can exclude a glass-to-metal seal.