This invention relates to particulate electroactive materials comprising a plurality of composite particles, wherein the composite particles comprise: (a) a porous carbon framework including micropores and optional mesopores having a combined total volume of at least 0.7 cm.sup.3/g, wherein at least half of the micropore/mesopore volume is in the form of pores having a diameter of no more than 1.5 nm; and (b) an electroactive material located within the micropores and/or mesopores of the porous carbon framework. The D.sub.90 particle diameter of the composite particles is no more than 10 nm.

An electrochemical cell is provided which includes a cathode, an anode, an electrolyte separator, and an anode current collector located on the anode. The anode is a three-dimensional (3D) porous anode including ionically conducting electrolyte strands and pores which extend through the anode from the anode current collector to the electrolyte separator. The anode also includes electronically conducting networks extending on sidewall surfaces of the pores from the anode current collector to the electrolyte separator.

Disclosed herein are an electrode stack including at least one positive electrode, at least one negative electrode, and at least one separator, wherein the separator is laminated to one surface or opposite surfaces of at least one of the electrodes, the positive electrode, the negative electrode, and the separator are stacked such that the separator is disposed between the positive electrode and the negative electrode, and a stacked surface of each of the positive electrode, the negative electrode, and the separator includes a curved surface, and a battery cell including the same.

The present disclosure provides a battery and method for preparing the same. The battery includes a cell and an electrolyte; the cell includes a positive electrode plate, a negative electrode plate and a separator. Wherein in the battery, at least one surface of the positive electrode film and/or the negative electrode film is provided with protrusions, with a proviso that: 0.3≤(T.sub.c+T.sub.a)/(H.sub.c+H.sub.a)≤1; wherein T.sub.c is a height of the protrusions provided on the at least one surface of the positive electrode film, T.sub.a is a height of the protrusions provided on the at least one surface of the negative electrode film, H.sub.c is a thickness increase of the positive electrode film when the battery has a 100% SOC, H.sub.a is a thickness increase of the negative electrode film when the battery has a 100% SOC.

There is provided a secondary battery including a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, wherein at least one of the positive electrode and the negative electrode contains a granular solid electrolyte and a granular conduction aid both bonded to a surface of a granular electrode active substance.

This electricity storage device is provided with an electrode assembly. The electrode assembly is constructed by laminating two electrodes of different polarities and a separator disposed between the electrodes with the electrodes being insulated from each other. Each of the electrodes has a metal foil and active material layers that are formed by coating an active material on the metal foil in a coating direction. The elongation rate of the separator varies in different directions, and the separator has a direction in which the elongation rate is higher than in the other directions. The higher elongation rate direction of the separator intersects the coating direction of the active material on at least one of the electrodes.

A lithium-ion battery having an anode including an array of nanowires electrochemically coated with a polymer electrolyte, and surrounded by a cathode matrix, forming thereby interpenetrating electrodes, wherein the diffusion length of the Li.sup.+ ions is significantly decreased, leading to faster charging/discharging, greater reversibility, and longer battery lifetime, is described. The battery design is applicable to a variety of battery materials. Methods for directly electrodepositing Cu.sub.2Sb from aqueous solutions at room temperature using citric acid as a complexing agent to form an array of nanowires for the anode, are also described. Conformal coating of poly-[Zn(4-vinyl-4′methyl-2,2′-bipyridine).sub.3](PF.sub.6).sub.2 by electroreductive polymerization onto films and high-aspect ratio nanowire arrays for a solid-state electrolyte is also described, as is reductive electropolymerization of a variety of vinyl monomers, such as those containing the acrylate functional group. Such materials display limited electronic conductivity but significant lithium ion conductivity. Cathode materials may include oxides, such as lithium cobalt oxide, lithium magnesium oxide, or lithium tin oxide, as examples, or phosphates, such as LiFePO.sub.4, as an example.

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

An all-solid-state battery configured to suppress capacity degradation. The all-solid-state battery may comprise a stack of a cathode layer, a solid electrolyte layer and an alloy-based anode layer, and a confining structure confining the stack in an approximately parallel direction to a stacking direction, wherein the cathode layer has a cathode plane on a side facing the solid electrolyte layer; wherein the alloy-based anode layer has an anode plane on a side facing the solid electrolyte layer; wherein the cathode plane and anode plane of the stack have a long axis direction and a short axis direction; and wherein at least one of the cathode plane and the anode plane has one or more slit channels.

An all-solid-state battery includes: a positive electrode layer including a positive electrode current collector and a positive electrode mixture layer; a negative electrode layer including a negative electrode current collector and a negative electrode mixture layer; and a solid electrolyte layer. The solid electrolyte layer is disposed between the positive electrode mixture layer and the negative electrode mixture layer. On a plane perpendicular to a stacking axis, an area of the negative electrode mixture layer is larger than an area of the positive electrode mixture layer. On the stacking axis, an entire portion of the positive electrode mixture layer overlaps a portion of the negative electrode mixture layer.