Integrated devices comprising integrated circuits and energy storage devices are described. Disclosed energy storage devices correspond to an all-solid-state construction, and do not include any gels, liquids, or other materials that are incompatible with microfabrication techniques. Disclosed energy storage device comprises energy storage cells with electrodes comprising metal-containing compositions, like metal oxides, metal nitrides, or metal hydrides, and a solid state electrolyte.

A rechargeable lithium battery includes a positive electrode including a positive active material; a negative electrode including a negative active material; and an electrolyte solution including a non-aqueous organic solvent, a lithium salt, and an additive, wherein the additive includes a compound represented by Chemical Formula 1, and the positive active material includes at least one lithium composite oxide represented by Chemical Formula 3.

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Disclosed herein is a composite particulate comprising a plurality of active material particles; and a single graphene sheet or a plurality of graphene sheets surrounds the plurality of active material particles and a surface of the composite particulate, wherein a single graphene sheet or a plurality of graphene sheets provides an electron-conducting path.

Provided herein are battery cells comprising artificial solid-electrolyte interphase (SEI) layers used as protective coatings on electrodes. The SEI layers are produced by liquid-phase deposition (LDP). The battery cell may comprise an anode, a cathode, an electrolyte disposed between the anode and the cathode, a polymer separator disposed between the anode and the cathode, and a casing containing the anode, the cathode, the electrolyte, and the polymer separator, wherein at least one or the anode or cathode comprises an SEI layer produced by an LDP method.

An anode material, including a matrix material, and the matrix material comprises carbon-doped silicon monoxide, and a content of the carbon ranges from 0.5% to 10% based on a total mass of the carbon and silicon monoxide. The anode material can significantly improve the cycle performance of an electrochemical device at room temperature and high temperature.

A negative electrode active material includes a matrix including at least a first element selected from the group consisting of silicon, tin, and germanium, at least a second element selected from the group consisting of copper, boron, phosphorous, aluminum, gallium, arsenic, antimony, lithium, and sodium, and oxygen. The second element bonds with oxygen; and a cluster includes the first element and is dispersed in the matrix.

The present disclosure provides methods for forming a two-dimensional silicon oxide negative electroactive material. The methods include contacting a two-dimensional silicon allotrope and an oxidizing agent in an environment having a temperature of greater than or equal to about 25° C. to less than or equal to about 1,000° C., where the contacting of the two-dimensional silicon allotrope and the oxidizing agent causes the two-dimensional silicon allotrope to oxidize and form the two-dimensional silicon oxide negative electroactive material. In certain variations, the oxidizing agent includes oxygen and the contacting of the two-dimensional silicon allotrope and the oxidizing agent may include disposing the two-dimensional silicon allotrope in an oxygen-containing environment comprising less than or equal to about 21% of oxygen. In other variations, the oxidizing agent includes a wet chemical agent.

A negative electrode active material including: silicon-containing composite particles including SiO.sub.x (0<x<2) and a Li compound; a carbon layer on at least a part of the surface of the silicon-containing composite particles; a surface layer including an amorphous phase on at least a part on the silicon-containing composite particles; and at least one Group 13 element and at least one Group 15 element.

The present invention relates to a battery electrode. The battery electrode comprises a plurality of carbon nanotubes and a plurality of transition metal oxide nanoparticles. The plurality of transition metal oxide nanoparticles are chemically bonded to the plurality of carbon nanotubes through carbon-oxygen-metal (C-O-M) linkages, wherein the metal being a transition metal element. The present invention also relates a method for making the battery electrode and a hybrid energy storage device using the battery electrode.

Provided are a negative electrode for a secondary battery including: a current collector; a first coating layer including a point-type conductive material and a binder, formed on the current collector; and a second coating layer including a silicon-based active material, formed on the first coating layer, and a lithium secondary battery including the same.