JP2004139954A5 - - Google Patents

Claims (21)

The current collector surface, tin, tin alloy, first coating layer comprising aluminum or aluminum alloy is formed, characterized in that the said first coating layer, the following holes 2mm in the following intervals 1mm is present A negative electrode for a non-aqueous electrolyte secondary battery. 2. A multilayer coating layer in which a second coating layer containing a metal having a low ability to form a lithium compound is formed on the first coating layer, and the pores are present in the multilayer coating layer. The negative electrode for nonaqueous electrolyte secondary batteries as described. A multilayer coating layer having a three-layer structure in which a first coating layer of the same kind or different type from the first coating layer is further formed on the second coating layer, and the pores are present in the multilayer coating layer The negative electrode for a nonaqueous electrolyte secondary battery according to claim 2. The negative electrode for a nonaqueous electrolyte secondary battery according to claim 1, wherein the holes are formed by laser treatment. The negative electrode for a non-aqueous electrolyte secondary battery according to any one of claims 1 to 4, wherein the first coating layer has a thickness of 0.5 to 50 µm. The negative electrode for a non-aqueous electrolyte secondary battery according to claim 2, wherein the thickness of the second coating layer is 0.02 to 50 μm. On the three-layer structure, there is further provided one or more coating layers in which the second coating layer and the first coating layer are the same or different from each other in this order. The negative electrode for a nonaqueous electrolyte secondary battery according to claim 3, wherein the negative electrode is formed and the pores are present in these coating layers. The negative electrode for a nonaqueous electrolyte secondary battery according to claim 3 or 7 , wherein a coating layer containing a metal having a low lithium compound forming ability is further formed as the uppermost layer. The negative electrode for a nonaqueous electrolyte secondary battery according to claim 8, wherein the uppermost layer has a thickness of 0.01 to 20 μm. The negative electrode for a nonaqueous electrolyte secondary battery according to any one of claims 2 to 9 , wherein the second coating layer has random and fine fracture portions at intervals of 2 mm or less. The negative electrode for a nonaqueous electrolyte secondary battery according to claim 2 or 8 , wherein the metal having a low ability to form a lithium compound is copper, iron, cobalt, chromium, or nickel. The negative electrode for a nonaqueous electrolyte secondary battery according to claim 2 , wherein the first coating layer is made of an alloy of tin or aluminum and a constituent element of the second coating layer and / or a constituent element of the current collector. The second coating layer is made of copper, iron, cobalt, chromium or nickel, or an alloy of copper, iron, cobalt, chromium or nickel and a constituent element of the first coating layer adjacent to the second coating layer claim 2 the negative electrode for a nonaqueous secondary battery according consisting.   The uppermost layer is made of copper, iron, cobalt, chromium or nickel, or made of an alloy of copper, iron, cobalt, chromium or nickel and a constituent element of the first coating layer adjacent to the uppermost layer. 8. A negative electrode for a non-aqueous electrolyte secondary battery according to 8.   On the surface of the current collector provided with a large number of slits, a first coating layer containing tin, tin alloy, aluminum or aluminum alloy, a second coating layer containing a metal having a low lithium compound forming ability, and the first coating layer A composite layer composed of the current collector and the multilayer coating layer obtained by providing a multilayer coating layer based on a three-layer structure in which the same kind or different kind of first coating layer is deposited by surface treatment by electrolysis or dry method. Production of a negative electrode for a nonaqueous electrolyte secondary battery, wherein pores having a diameter of 2 mm or less are formed in the multilayer coating layer at intervals of 1 mm or less by applying a tensile force in the outer direction to the body. Method.   A first coating layer containing tin, a tin alloy, aluminum or an aluminum alloy, a second coating layer containing a metal having a low ability to form a lithium compound, and the same or different type of first coating layer as the first coating layer. A multilayer coating layer based on a three-layer structure in which the coating layer is deposited by surface treatment by electrolysis or a dry method is provided, and the multilayer coating layer is formed on the resulting composite comprising the current collector and the multilayer coating layer. A method for producing a negative electrode for a non-aqueous electrolyte secondary battery, wherein pores having a diameter of 2 mm or less are formed in the multilayer coating layer at intervals of 1 mm or less by laser treatment from the side.   A first coating layer containing tin, a tin alloy, aluminum or an aluminum alloy, a second coating layer containing a metal having a low ability to form a lithium compound, and the same or different type of first coating layer as the first coating layer. A multilayer coating layer based on a three-layer structure in which the coating layer is deposited by surface treatment by electrolysis or a dry method is provided, and the multilayer coating layer is formed on the resulting composite comprising the current collector and the multilayer coating layer. A method for producing a negative electrode for a non-aqueous electrolyte secondary battery, wherein holes are formed with a diameter of 2 mm or less at intervals of 1 mm or less in the multilayer coating layer by drilling with a pin from the side. On the three-layer structure, there is further provided one or more coating layers in which the second coating layer and the first coating layer are the same or different from the second coating layer and the first coating layer, respectively. And the manufacturing method of the negative electrode for nonaqueous electrolyte secondary batteries in any one of Claims 15-17 which form the said void | hole after that. The random and fine fracture | rupture part is provided in the said 2nd coating layer by the space | interval of 2 mm or less by giving a press or roll-rolling process from the multilayer coating layer side of the said composite_body | complex. The manufacturing method of the negative electrode for nonaqueous electrolyte secondary batteries of description. The non-aqueous solution according to any one of claims 15 to 17 , wherein the composite comprising the current collector and the multilayer coating layer is heat-treated at 120 to 350 ° C for 10 minutes to 24 hours before or after forming the pores. The manufacturing method of the negative electrode for electrolyte secondary batteries. The nonaqueous electrolyte secondary battery using the negative electrode in any one of Claims 1-14 .