The present disclosure relates to in-plane modulated, microgradient-patterned (MGP) carbon-coated metal surface as a current collector (CC) for dendrite-free alkali metal plating and stripping with high coulombic efficiency and long cycle life. The specific microstructure and property of the MGP carbon coating of the present disclosure are prepared by scanned CO2 laser in-situ processing of a polymer coating.

A lithium battery cell with an internal fuse component and including needed tabs which allow for conductance from the internal portion thereof externally to power a subject device is provided. Disclosed herein are tabs that exhibit sufficient safety levels in combination with the internal fuse characteristics noted above while simultaneously displaying pull strength to remain in place during utilization as well as complete coverage with the thin film metallized current collectors for such an electrical conductivity result. Such tabs are further provided with effective welds for the necessary contacts and at levels that exhibit surprising levels of amperage and temperature resistance to achieve the basic internal fuse result with the aforementioned sufficient conductance to an external device. With such a tab lead component and welded structure, a further improvement within the lithium battery art is provided the industry.

A film includes a base layer, where each of front and back sides of the base layer is provided with a bonding layer, a composite structure layer, an aluminum material layer, and an anti-oxidation layer in sequence. The composite structure layer includes at least two structure layers. Each structure layer is composed of an aluminum material layer and a reinforcement layer, and the structure layers are stacked. With the composite structure layer, the new film has a resistivity as low as 4.5×10.sup.−8 Ω.Math.m, a peel force as high as 4.8 N to 5.2 N, and improved bonding force and compactness.

An electrode, a lithium secondary battery including the same, and a method of preparing the electrode are provided. The electrode includes an electrode active material layer including an electrode active material and a binder, and having a plurality of through-holes; an electrode current collector on one surface of the electrode active material layer or between two surfaces of the electrode active material layer; and an interlayer between the electrode active material layer and the electrode current collector, wherein the electrode active material layer is a self-standing film and the plurality of through-holes included in the electrode active material layer extend to the interlayer.

The present invention relates to a lithium secondary battery comprising: a current collector comprising a structure in a fabric form in which fiber bundles are cross-woven, wherein each of the fiber bundles is formed of sets of fiber yarns and each of the fiber yarns includes a polymer fiber and a metal layer surrounding the polymer fiber; and an electrode including an active material layer disposed on at least one surface of the current collector.

Apparatus, systems, and methods described herein relate to safety devices for electrochemical cells comprising an electrode tab electrically coupled to an electrode, the electrode including an electrode material disposed on a current collector. In some embodiments, a fuse can be operably coupled to or formed in the electrode tab. In some embodiments, the fuse can be formed by removing a portion of the electrode tab. In some embodiments, the fuse can include a thin strip of electrically resistive material configured to electrically couple multiple electrodes. In some embodiments, the current collector can include a metal-coated deformable mesh material such that the current collector is self-fusing. In some embodiments, the fuse can be configured to deform, break, melt, or otherwise discontinue electrical communication between the electrode and other components of the electrochemical cell in response to a high current condition, a high voltage condition, or a high temperature condition.

An electrode, a method for preparing the same, a battery, and an electrical apparatus are provided. The electrode comprises a current collector layer having a porous structure and being gas permeable; and an active material layer laminated on at least part of surface of the current collector layer and located outside pores of the porous structure.

An electrode structure and an all-solid-state secondary battery, the electrode structure includes an anode current collector having first and second surfaces, the first surface including first and second portions, and a middle portion between the first and second portions, the first and second portions being oriented to face outwardly in opposite directions with the middle portion therebetween, and the anode current collector being folded such that the second surface faces inwardly in the anode current collector; first and second anode plate layers on the first surface; first and solid electrolyte layers on outer sides of the first and second anode plate layers; first and second cathode plate layers on outer sides of the first and second solid electrolyte layers; and an elastic sheet inside an interior space of the folded anode current collector.

The electrode plate includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein the current collector includes a support layer and a conductive layer, the conductive layer has a single-sided thickness D2 satisfying: 30 nm≤D2≤3 μm; the electrode active material layer is divided into two regions, an inner region and an outer region in a thickness direction of the electrode active material layer, in which the weight percentage of the conductive agent in the inner region of the electrode active material layer is higher than the weight percentage content of the conductive agent in the outer region of the electrode active material layer, and the conductive agent in the inner region of the electrode active material layer includes at least one of a one-dimensional conductive material and a two-dimensional conductive material.

An electrical storage device includes high surface area fibers (e.g., shaped fibers and/or microfibers) coated with carbon (graphite, expanded graphite, activated carbon, carbon black, carbon nanofibers, CNT, or graphite coated CNT), electrolyte, and/or electrode active material (e.g., lead oxide) in electrodes. The electrodes are used to form electrical storage devices such as electrochemical batteries, electrochemical double layer capacitors, and asymmetrical capacitors.