An all-solid-state battery includes: a cathode-current-collector layer, a first layer disposed on the cathode-current-collector layer, and including at least one selected from the group consisting of a particulate carbon material, a fibrous carbon material, and a combination thereof; a second layer arranged between the first layer and the cathode-current-collector layer, and including a carbon material having a layered structure; an electrolyte layer disposed on the first layer; and a complex anode layer disposed on the electrolyte layer.

The present specification relates to a carrier-nanoparticle complex and a preparation method thereof.

Processes for preparing a niobate material include the following steps: (i) providing a niobium-containing source; (ii) providing a transitional metal source (TMS), a post-transitional metal source (PTMS), or both; (iii) dissolving (a) the niobium-containing source, and (b) the TMS, the PTMS, or both in an aqueous medium to form an intermediate solution; (iv) forming an intermediate paste by admixing an inert support material with the intermediate solution; (v) optionally coating the intermediate paste on a support substrate; and (vi) removing the inert support material by subjecting the intermediate paste to a calcination process and providing a transition-metal-niobate (TMN) and/or a post-transition-metal-niobate (PTMN). Anodes including a TMN and/or PTMN are also provided.

Provided herein are lithium metal oxide composites made up of lithium metal oxide coated with a metal oxide shell. The metal oxide shell may include a plurality of metal oxide particles dispersed in a porous carbon matrix. Such composites may be suitable for use as electrode materials, or more specifically for use in batteries. Provided herein are also methods for producing such composites involving the mechanochemical processing of metal-organic frameworks with lithium metal oxide to produce lithium metal oxide coated with a metal-organic framework shell, which is then pyrolyzed.

A three-dimensional porous composite electrode includes a three-dimensional porous current-collector and an active material layer including an active material and having a three-dimensional structure along a surface of the three-dimensional porous current-collector. The three-dimensional porous current-collector extends along a first direction, includes a current-collecting material and has a porosity gradient along a second direction perpendicular to the first direction. The three-dimensional porous composite electrode has a ratio gradient of the active material to the current-collecting material along the second direction.

An electrochemical cell is provided, which includes a cathode comprising a three dimensional (3D) porous cathode structure, an anode, an electrolyte separator, comprised of a ceramic material, located between the cathode and the anode, and a cathode current collector, wherein the cathode is located between the cathode current collector and the electrolyte separator. The 3D porous cathode structure includes ionically conducting electrolyte strands extending through the cathode from the cathode current collector to the electrolyte separator, pores extending through the cathode from the cathode current collector to the electrolyte separator, and an electronically conducting network extending on sidewall surfaces of the pores from the cathode current collector to the electrolyte separator.

The invention is directed to a flexible and stretchable battery which is formed of an assembly having anode side and a cathode side separated by a separator and sealed in a packaging. The assembly is in a folded configuration and contains at least one cut therein, such that when the assembly is unfolded and subjected to subsequent deformation, a final folded state of the battery is able to stretch beyond a flat planar state of the battery in all dimensions.

Disclosed is a multilayer cable-type secondary battery including a first electrode assembly comprising one or more first inner electrodes and a sheet-type first separation layer-outer electrode complex spirally wound to surround outer surfaces of the first inner electrodes, a separation layer surrounding the first electrode assembly to prevent short circuit of the electrodes, and a second electrode assembly comprising one or more second inner electrodes surrounding an outer surface of the separation layer and a sheet-type second separation layer-outer electrode complex spirally wound to surround outer surfaces of the second inner electrodes.

A secondary battery includes: a cathode; an anode including an active material; and an electrolytic solution, wherein the active material includes a central section and a covering section provided on a surface of the central section, the central section includes silicon (Si) as a constituent element, the covering section includes carbon (C) and hydrogen (H) as constituent elements, and one or more of positive ions represented by CxHy (x and y satisfy 2≦x≦6 and 3≦y≦9) are detected by positive ion analysis of the covering section with the use of time-of-flight secondary ion mass spectrometry.

A device can be used as an electrode for a lithium-ion battery. The device comprises an electrically conductive substrate to the surface of which nanofilaments having an ion-absorbing coating are applied. The nanofilaments are combined by the application of light into a plurality of bundles, each having multiple nanofilaments. A spacer gap is formed between neighboring bundles.