Abstract: A device, e.g., a current collector and/or a lithium-ion or lithium-metal battery, is disclosed. The device includes a metallic substrate and a plurality of nanorod arrays arranged on the substrate. The plurality of nanorod arrays are porous metallic nanostructures and appear black in color. The plurality of nanorod arrays comprise titanium according to an example. The metallic substrate comprises a metal foil according to an example.

Abstract: A device may include a metallic substrate and a plurality of nanorod arrays arranged on the substrate. The nanorod arrays may be made of porous metallic nanostructures and may appear black in color.

Abstract: Disclosed herein is a cooking system for cooking food, the system including a housing defining a hollow chamber configured to receive a food container. The housing has an upper portion defining an opening to the hollow chamber. A food container having a hollow container interior is positionable within the hollow chamber. An end of the food container extends above the upper portion of the housing when the container is installed within the hollow chamber. A lid is moveably attached to the housing and is moveable between a first position that covers the upper portion of the housing and the opening to the hollow chamber when the food container is installed within the hollow chamber and a second position where the lid does not cover the opening to the hollow chamber. At least one heating element is associated with at least one of said lid and said housing.

Abstract: A lithium-ion battery may include a lithium-free cathode, a lithiated anode, and a separator/electrolyte between the lithium-free cathode and the lithiated anode. The lithium-free cathode may include FeOF and MnO2. The FeOF may be in the form of nanorods, and the MnO2 may be in the form of monolayer nanosheets. The FeOF nanorods may be sandwiched or wrapped by the monolayer MnO2 nanosheets.