PRIMER ADHESIVE FOR DRY ELECTRODE AND PREPARATION METHOD THEREFOR, COMPOSITE CURRENT COLLECTOR, BATTERY ELECTRODE PLATE, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK AND POWER CONSUMING DEVICE
A primer adhesive for a dry electrode includes following components in parts by mass: 30-70 parts of a modified polyolefin resin and 10-60 parts of a conductive material, where the modified polyolefin resin is a copolymer formed by polymerization of maleic anhydride, polyolefin, and a petroleum resin.
1 . A primer adhesive for a dry electrode, comprising following components in parts by mass:
30-70 parts of a modified polyolefin resin; and
10-60 parts of a conductive material;
wherein the modified polyolefin resin is a copolymer formed by polymerization of maleic anhydride, polyolefin, and a petroleum resin.
2 . The primer adhesive according to claim 1 , wherein the primer adhesive comprises the following components in parts by mass:
40-60 parts of the modified polyolefin resin, and
20-50 parts of the conductive material.
3 . The primer adhesive according to claim 1 , wherein the modified polyolefin resin has a weight average molecular weight of 1,000,000-1,500,000.
4 . The primer adhesive according to claim 1 , wherein the polyolefin is selected from one or more of: polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, a styrene-butadiene copolymer, a styrene-ethylene-butylene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, and an amorphous poly α-olefin resin.
5 . The primer adhesive according to claim 1 , wherein the conductive material is a carbon material selected from one or more of: carbon black, graphene, carbon nanotubes, graphite, and mesophase carbon microspheres.
6 . The primer adhesive according to claim 1 , wherein mass ratio of the modified polyolefin resin to the conductive material is 0.8-1.7:1.
7 . The primer adhesive according to claim 1 , wherein maleic anhydride, polyolefin, and petroleum resin in the modified polyolefin resin satisfy:
0
.
1
≤
a
1
(
a
2
+
a
3
)
a
2
a
3
*
≤
0
.
7
,
wherein a1 is a mass percentage of the maleic anhydride in the modified polyolefin resin, a2 is a mass percentage of the polyolefin in the modified polyolefin resin, and a3 is a mass percentage of the petroleum resin in the modified polyolefin resin.
8 . The primer adhesive according to claim 1 , further comprising:
0.1-1 parts by mass of an additive, wherein the additive includes an antioxidant and an anti-aging agent.
9 . The primer adhesive according to claim 1 , further comprising:
1-10 parts by mass of paraffin wax.
10 . A method for preparing the primer adhesive according to claim 1 , comprising:
preparing the modified polyolefin resin; and
mixing the modified polyolefin resin, the conductive material, an additive, and paraffin wax.
11 . The method according to claim 10 , wherein preparing the modified polyolefin resin comprises copolymerizing maleic anhydride, polyolefin, and a petroleum resin at 150-180° C. to obtain the modified polyolefin resin.
12 . A composite current collector, comprising:
a primer adhesive layer, wherein the primer adhesive layer is provided on at least one surface of the current collector, a thickness of the primer adhesive layer on one surface of the current collector is 1-10 μm, and the primer adhesive layer is formed by means of coating the primer adhesive according to claim 1 .
13 . A battery electrode plate, comprising:
the composite current collector according to claim 12 ; and
a dry electrode film layer, wherein the dry electrode film layer is provided on the primer adhesive layer in the composite current collector.
14 . A secondary battery, comprising the battery electrode plate according to claim 13 .
15 . A battery module, comprising the secondary battery according to claim 14 .
16 . A battery pack, comprising the battery module according to claim 15 .
17 . A power consuming device, comprising the secondary battery according to claim 14 .