Copolymers of one or more halogenated olefins and one or more halogenated co-monomers selected from the group consisting of halogenated alkenyl ethers, halogenated alkenyl esters, and halogenated (meth)acrylates are useful in various end-use applications wherein the presence of halogen (e.g., fluorine) in the copolymer imparts one or more desirable properties, as compared to analogous copolymers not containing halogen.

The present application discloses a binder, a negative-electrode slurry, a negative electrode, and a lithium-ion battery. In the present application, the binder comprises a first block polymer and a second block polymer. The first block polymer is a lithiated tetrablock polymer having a structure shown as B-C-B-A, wherein A represents a polymer block A, B represents a polymer block B, and C represents a polymer block C; the polymer block A is polymerized from alkenyl formic acid monomers; the polymer block B is polymerized from aromatic vinyl monomers; and the polymer block C is polymerized from acrylate monomers. The second block polymer is a lithiated triblock polymer having a structure shown as E-F-E, wherein E represents a polymer block E, and F represents a polymer block F; the polymer block E is polymerized from alkenyl formic acid monomers; and the polymer block F is polymerized from acrylate monomers.

A flat-plate type sodium metal battery and an electrochemical device are described. The battery comprises a positive electrode plate and a negative electrode plate, the positive electrode plate provided with a first micro-through-hole arranged in an array on at least part of the surface thereof, the negative electrode plate provided with a second micro-through-hole arranged in an array on at least part of the surface thereof, wherein the first micro-through-hole and the second micro-through-hole have an overlapping area of ≥5% of the total area of the second micro-through-hole of the negative electrode plate. Disposing a first micro-through-hole on the positive electrode plate, and a second micro-through-hole on the negative electrode plate, and setting the aperture size and aperture spacing of micro-through-holes are beneficial to increasing infiltration and penetration of the electrolyte in the positive electrode plate and are conducive to rapid infiltration to large-sized electrode plates.

An electrochemical apparatus includes a positive electrode. The positive electrode includes a current collector. The current collector includes a coated region provided with an active material, and an uncoated region, where the uncoated region is at least partially provided with an insulation layer, and the insulation layer includes a binder and inorganic particles. Based on a total mass of the insulation layer, a mass percentage of element aluminum in the insulation layer is 20% to 52%. An adhesion F between the insulation layer and the current collector is not less than 201 N/m. In the electrochemical apparatus in this application, the safety of the electrochemical apparatus is improved due to sufficient adhesion between the insulation layer and the current collector of the positive electrode.

In various examples, a functionalized cross-linked polymer network includes a plurality of cross-linked multifunctional trione triazine groups, a plurality of disulfide groups, a plurality of cross-linked multifunctional ether groups, a plurality of cross-linked multifunctional polyether groups, or a combination thereof, a plurality of crosslinking multifunctional polyether groups, and a plurality of dangling groups, where individual cross-linked multifunctional trione triazine groups and/or cross-linked multifunctional disulfide groups and/or cross-linked multifunctional ether groups and/or cross-linked multifunctional polyether groups and individual crosslinking multifunctional polyether groups are connected by one or more covalent bond(s) and individual dangling groups may be connected to the network by a covalent bond. At least a portion of or all of the dangling groups may be halogenated. A functionalized cross-linked polymer network may be made by polymerization (e.g., Thiol-ene reach on(s)) of one or more functionalized monomer(s) and one or more multifunctional monomer(s).

This application describes a process for the preparation of carbon-coated particles, where the particles comprise an electrochemically active material. The process comprises the steps of emulsion polymerization, drying and thermally treating the polymer to obtain a nano-layer of carbon on the particles, where the carbon layer comprises fibers and nitrogen-containing polyaromatics have a graphene-like structure. The application also further relates to the particles produced by the method as well as to electrode materials, electrodes and electrochemical cells comprising the particles.

An aluminum battery negative electrode structure includes an aluminum foil and a coating layer. The coating layer is arranged on the aluminum foil. A material of the coating layer includes a high specific surface area carbon material. A specific surface area of the high specific surface area carbon material ranges from 500 m.sup.2/g to 3,000 m.sup.2/g.

A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed. The negative electrode may include a silicon-based negative active material and a binder, where the binder is an acryl-based copolymer, the acryl-based copolymer including an acrylic acid first monomer, an acrylonitrile second monomer, and a (meth)acrylate third monomer. The acrylic acid first monomer may include acrylic acid substituted with lithium ions. The (meth)acrylate third monomer may include an ethylene glycol group, and a weight-average molecular weight (Mw) of the (meth)acrylate third monomer is less than about 900 g/mol.

A method of manufacturing a negative electrode includes styrene butadiene rubber on at least one surface of a negative electrode current collector, applying a second slurry including a negative electrode active material and a polyacrylic acid-based binder onto the first slurry, and drying and rolling the negative electrode current collector to which the first slurry and the second slurry are applied. The negative electrode active material includes a silicon-based negative electrode active material. According to the present disclosure, expansion and contraction of a silicon-based negative electrode active material during charging and discharging may be alleviated, and electrode flexibility may be improved, resulting in a significant improvement in lifespan properties of a secondary battery.

There is provided an electrode layer for an all-solid state battery, which contains an electrode active material and a sulfide solid electrolyte, where the sulfide solid electrolyte has an average particle diameter of less than 1 .Math.m and the electrode layer contains an imidazoline-based dispersion material.