A method of manufacturing an electrode includes: an application process of applying mixture slurry containing a dispersion medium and an electrode mixture that contains an electrode active material onto a surface of a core material sheet to form a first electrode plate having a wet coating film; a drying process of heating the first electrode plate at a first temperature to volatilize the dispersion medium from the wet coating film to form a second electrode plate having a dry coating film; and a firing process of heating the second electrode plate at a second temperature higher than the first temperature to obtain a fired third electrode plate. In the firing process, the second electrode plate is heated at the second temperature while being transported by a roll-to-roll method.

A polymer binder with high peel strength is used in a secondary lithium battery. The polymer binder is obtained by a ring-opening reaction of polyvinylene carbonate by a nucleophile. The polyvinylene carbonate accounts for 10-90% of the total mass of the polymer binder while the nucleophile accounts for 10-90% of the total mass of the polymer binder. The polymer binder has high peel strength (0.02-0.6 N/mm) and high decomposition voltages (4.5-6.0 V), and can be used as an electrode material binder in a secondary lithium battery.

In an electrode production apparatus disclosed herein an electrode material supplied between a circumferential surface of a first roll and a circumferential surface of a second roll is transferred to a surface of a separately supplied electrode collector, to thereby form an electrode mix layer on the electrode collector. A predetermined textured shape is formed on the circumferential surfaces of the first roll and of the second roll, the textured shape being formed through repetition of a predetermined relief pattern, at a given pitch, in a running direction. The pitch (smallest repeating unit) and a recess depth of the relief pattern are designed so that the following expression y≤0.2x−20 holds, where x (μm) denotes the pitch and y (μm) denotes the recess depth.

Embodiments described herein relate generally to systems and methods for continuously and/or semi-continuously manufacturing semi-solid electrodes and batteries incorporating semi-solid electrodes. In some embodiments, the process of manufacturing a semi-solid electrode includes continuously dispensing a semi-solid electrode slurry onto a current collector, separating the semi-solid electrode slurry into discrete portions, and cutting the current collector to form a finished electrode.

Methods are disclosed for manufacturing an electrode for use in a device such as a secondary battery. Electrodes may include a first layer having first active particles adhered together by a binder, a second layer having second active particles adhered together by a binder, and an interphase layer interposed between the first and second layers. In some examples, the interphase layer may include an interpenetration of the first and second particles, such that substantially discrete fingers of the first layer interlock with substantially discrete fingers of the second layer.

In a first aspect, the present invention relates to a composite anode material, comprising: (i) a layer of silicon-carbon (Si/C) composite material comprising silicon-carbon composite particles, and (ii) a graphene oxide (GO) layer covering the layer of silicon-carbon composite material; wherein the silicon-carbon composite particles each comprise a plurality of silicon (Si) particles intermixed with a carbon-based material, and wherein the silicon-carbon composite particles comprise a porous shell surrounding a hollow, the porous shell comprising the plurality of silicon particles intermixed with the carbon-based material.

Disclosed is a gravure coating apparatus including: two frames; a first support shaft which is installed between the two frames; a rotary spline which is installed between the two frames and in parallel with the first support shaft; and multiple gravure roller modules which are installed to be fitted with the first support shaft and the rotary spline; in which the multiple gravure roller modules receive rotational force from the rotary spline and move independently along the first support shaft.

The present invention relates to a slot die with a structure in which a stripe shim and a cover shim are mounted between an upper body and a lower body, and a choke bar is inserted into a through path formed in the upper body, and an apparatus for coating an electrode slurry including the slot die. According to the present invention, by forming a space in which the choke bar can move by the cover shim, it is possible to adjust the flow rate of the slurry through the choke bar regardless of the shape of the stripe shim.

[Problem] To lower electrical resistance by increasing the interfacial surface area and the adhesion between a current collector and an active material or an electrolyte, or between the active material and the electrolyte in an all-solid-state battery. In addition, to improve battery performance by eliminating or minimizing residual carbon originating from a binder. [Solution] According to the present invention, a slurry, composed of an electrode active material and a solvent, and a slurry, composed of electrolyte particles and a solvent, can be impacted against a target and thereby attached thereto to form a high-density layer and improve adhesion. Moreover, residual carbon is eliminated or minimized by eliminating or minimizing the content of binders, thereby improving battery performance.

Silicon particles for active materials and electro-chemical cells are provided. The active materials comprising silicon particles described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0% and less than about 90% by weight of silicon particles. The silicon particles have an average particle size between about 0.1 μm and about 30 μm and a surface including nanometer-sized features. The composite material also includes greater than 0% and less than about 90% by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases is a substantially continuous phase.