Electrode lead wire member and battery
Provided are an electrode lead wire member including a sealing film having high adhesive strength and resistance to an electrolytic solution, and a battery including the electrode lead wire member. Provided is an electrode lead wire member including: a derivation portion extending in one direction; a surface-treated layer formed, at the derivation portion, on a surface of the derivation portion; and a sealing film provided in contact with the surface-treated layer, in which the sealing film has an adhesive resin layer in contact with the surface-treated layer, and the adhesive resin layer contains imine-modified polyolefin or modified polyolefin having a carbodiimide group.
1. An electrode lead wire member comprising:
a derivation portion consisting of metal and extending in one direction;
a surface-treated layer formed, at said derivation portion, on a surface of said derivation portion; and
a sealing film provided in contact with said surface-treated layer, wherein
said sealing film has an adhesive resin layer in contact with said surface-treated layer,
said sealing film is a monolayer film only including said adhesive resin layer, or a laminate in which said adhesive resin layer, a substrate layer, and a second adhesive resin layer are laminated in that order,
said adhesive resin layer and said second adhesive resin layer consist essentially of modified polyolefin having a carbodiimide group,
a carboxy group, a carbonyl group, a phenolic hydroxy group, a sulfo group or a phosphoric acid is exposed on a surface of said surface-treated layer,
said modified polyolefin having a carbodiimide group is obtained by reacting polyolefin having a group reactive with a carbodiimide group and a carbodiimide group-containing compound in the presence of unmodified polyolefin, and
the electrode lead wire member is fused with a laminate for a battery outer package via said sealing film.
2. The electrode lead wire member according to claim 1 , wherein a resin constituting said substrate layer is one or more selected from the group consisting of a fluorine resin, polyether ether ketone, a polyphenylene sulfide resin, polyphenylene ether, a syndiotactic polystyrene resin, polyethylene naphthalate, polyethylene terephthalate, a polyimide resin, a phenol resin, an epoxy resin, an acrylic resin, polyketone, a cyclic olefin resin, polymethylpentene, polypropylene, and polyethylene.
3. The electrode lead wire member according to claim 1 , comprising one pair of sealing films holding said derivation portion, wherein
in said one pair of sealing films, adhesive resin layers face and come in contact with each other, and simultaneously come in contact with a whole circumference in a circumferential direction of said derivation portion to cover said derivation portion.
4. A battery comprising the electrode lead wire member with the sealing film according to claim 1 .