Abstract: Embodiments of the present application provide an electrode piece, a battery cell and a battery, where the electrode piece includes a current collector, a first material layer, and an active material layer; the first material layer and the active material layer are provided on a surface of the current collector, and the first material layer and the active material layer extend along a length direction of the current collector and are alternately arranged in a width direction of the current collector; where the first material layer includes a first material, and the first material includes an amphiphilic polymer and a structural conductive polymer. The infiltration effect of the electrolyte can be improved, the aging time is shortened, and an injection amount of electrolyte is reduced.

Abstract: The present application discloses a binder for a lithium ion battery, which comprises a polymer obtained through emulsion polymerization of a monomer in the presence of a reactive emulsifying agent. The binder is used in fabrication of a lithium ion electrode plate, whereby a thin film formed on the surface of an electrode membrane and fine channels formed in the electrode membrane with the use of a conventional emulsifying agent during the electrode membrane-forming process are eliminated, and the lithium ion conductivity of the electrode membrane is improved. Meanwhile, with the use of the reactive emulsifying agent, the bonding effect of the binder and the stability of the electrode membrane are improved, thereby greatly improving the charging rate and cycle life of the lithium ion battery.

Abstract: The present application discloses a binder for a lithium ion battery, which comprises a polymer obtained through emulsion polymerization of a monomer in the presence of a reactive emulsifying agent. The binder is used in fabrication of a lithium ion electrode plate, whereby a thin film formed on the surface of an electrode membrane and fine channels formed in the electrode membrane with the use of a conventional emulsifying agent during the electrode membrane-forming process are eliminated, and the lithium ion conductivity of the electrode membrane is improved. Meanwhile, with the use of the reactive emulsifying agent, the bonding effect of the binder and the stability of the electrode membrane are improved, thereby greatly improving the charging rate and cycle life of the lithium ion battery.

Abstract: The present application discloses a lithium-ion secondary battery. By using an adhesive containing an active group in a positive electrode and/or a negative electrode, and using a coupling agent solution containing an amino or epoxy group to treat the surface of a separator, an interface between the separator and an electrode react chemically to be connected with a covalent bond, thus improving the deformation of the lithium-ion secondary battery during a cycle.

Abstract: The present disclosure provides a negative material layer, which comprises negative active material, conductive agent, binder material and thickening agent. A weight percentage of the binder material in the negative material layer is not more than 2%. The binder material comprises a polymer polymerized from a styrene monomer, an acrylic ester monomer and an acrylic acid monomer. The negative material layer has a small amount of binder material, an excellent ion conductivity; the lithium-ion battery using the negative material layer can avoid lithium precipitation from occurring on a surface of the negative electrode and have an excellent safety performance and an excellent cycle performance in the case of quick and high rate charge.

Abstract: A rapid charge lithium-ion battery comprises a positive plate, a negative plate, a separator disposed at intervals between the positive plate and the negative plate, and an electrolyte. The positive plate includes a positive current collector and a positive active material layer disposed on a surface of the positive current collector; the positive active material layer includes a positive active material, a positive conductive agent and a positive adhesive; the positive active material includes a component A and a component B; the component A is selected from at least one of lithium nickel cobalt aluminum oxide (NCA), lithium nickel cobalt manganese oxide (NCM), lithium manganese oxide (LMO) and lithium cobalt oxide (LiCoO2); the component B is selected from at least one of lithium iron phosphate (LFP) and lithium titanium oxide (LTO); and the component B accounts for 5 to 90 percent by mass of the positive active material.