An anodeless electrochemical cell is provided that includes a positive electroactive material layer and a patterned current collector. The patterned current collector includes a non-conductive substrate and a conductive network disposed over a surface of the non-conductive substrate. The surface of the non-conductive substrate defines a first surface area, and a perimeter of the conductive network defines a second surface area. The second surface area covers greater than 90% of the first surface area. The conductive network includes a framework having plurality of pores, such that the conductive network has a porosity greater than or equal to about 20 vol. % to less than or equal to about 95 vol. %. During a charging event, the pores are configured to receive deposited lithium metal. The anodeless electrochemical cell further includes a separator between the positive electroactive material layer and the patterned current collector.

An anodeless electrochemical cell is provided that includes a positive electroactive material layer and a patterned current collector. The patterned current collector includes a non-conductive substrate and a conductive network disposed over a surface of the non-conductive substrate. The surface of the non-conductive substrate defines a first surface area, and a perimeter of the conductive network defines a second surface area. The second surface area covers greater than 90% of the first surface area. The conductive network includes a framework having plurality of pores, such that the conductive network has a porosity greater than or equal to about 20 vol. % to less than or equal to about 95 vol. %. During a charging event, the pores are configured to receive deposited lithium metal. The anodeless electrochemical cell further includes a separator between the positive electroactive material layer and the patterned current collector.

A technique facilitates evaluation of a fluid, such as a fluid produced from a well. The technique utilizes a modular and mobile system for testing flows of fluid which may comprise mixtures of constituents, and for sampling fluids thereof. The multiphase sampling method includes flowing a multiphase fluid comprising an oil phase and a water phase through a first conduit, the oil phase and water phase at least partially separating in the first conduit, mixing together the oil phase and water phase to form a mixed bulk liquid phase by flowing the multiphase fluid through a flow mixer toward a second conduit downstream the flow mixer, sampling a portion of the mixed bulk liquid phase at location at or within the second conduit, wherein the sampled portion of the mixed bulk liquid phase has a water-to-liquid ratio (WLR) representative of the pre-mixed oil phase and water phase.

Methods for manufacturing intermittently coated dry electrodes for energy storage devices and energy storage devices including the intermittently coated dry electrodes are disclosed. In one embodiment, the method includes providing a metal layer and providing an electrochemically active free-standing film formed of a dry active material. The method also includes combining the electrochemically active free-standing film and the metal layer to form a combined layer. The method further includes removing a portion of the electrochemically active free-standing film from the combined layer so that the electrochemically active free-standing film is intermittently formed on the metal layer in a longitudinal direction of the metal layer.

The present invention provides a chromium-containing steel sheet for a current collector of a nonaqueous electrolyte secondary battery which has excellent corrosion resistance in a battery environment and, when used as a current collector of a nonaqueous electrolyte secondary battery, which enables the nonaqueous electrolyte secondary battery to have excellent cycle characteristics.

A chromium-containing steel sheet for a current collector of a nonaqueous electrolyte secondary battery has a chemical composition containing 10% by mass or more of Cr. The chromium-containing steel sheet has an irregular structure including recesses and protrusions at a surface thereof. The average height of the protrusions is 20 nm or more and 100 nm or less, and the average spacing between the protrusions is 20 nm or more and 300 nm or less.

An electrode structure including an active material structure, the active material structure including a first active material plate having a plurality of first penetration holes extending in a thickness direction of the first active material plate; and a second active material plate stacked on a side of the first active material plate in a first direction, wherein the electrode structure is configured for use in a secondary battery.

An electrode structure including an active material structure, the active material structure including a first active material plate having a plurality of first penetration holes extending in a thickness direction of the first active material plate; and a second active material plate stacked on a side of the first active material plate in a first direction, wherein the electrode structure is configured for use in a secondary battery.

This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate in this application includes a current collector, an electrode active material layer disposed on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is disposed on a main body portion of the current collector at a zone referred to as a film zone, the electrical connection member and the current collector are welded and connected at an edge of the current collector at a welding zone referred to as a transfer welding zone, and a transition zone of the current collector between the film zone and the transfer welding zone, coated with no electrode active material layer, is referred to as an extension zone. The current collector is a composite current collector.

Disclosed is a lead acid battery having a negative electrode plate and a positive electrode plate, each plate formed of a lead-antimony grid coated with an active material. A separator is disposed between the first and second electrode plate faces and an electrolyte solution immersing the negative electrode plate, the positive electrode plate the separator. At least one of the lead-antimony electrode grids, the separator or the electrolyte solution contains TiO.sub.2, an amount sufficient to suppress the migration of antimony from the positive electrode plate to the negative electrode plate.

Disclosed is a lead acid battery having a negative electrode plate and a positive electrode plate, each plate formed of a lead-antimony grid coated with an active material. A separator is disposed between the first and second electrode plate faces and an electrolyte solution immersing the negative electrode plate, the positive electrode plate the separator. At least one of the lead-antimony electrode grids, the separator or the electrolyte solution contains TiO.sub.2, an amount sufficient to suppress the migration of antimony from the positive electrode plate to the negative electrode plate.