ELECTRODE FILM ROLLED WEB, ELECTRODE, ELECTRODE LAMINATE, ELECTROCHEMICAL DEVICE, AND APPARATUS

1 . An electrode film rolled web comprising:

an adhesive layer; and

a negative active material layer laminated on the adhesive layer and including a negative active material,

wherein the adhesive layer includes a particulate conductive material and a binder,

the binder contains a polyisobutylene and a polypropylene,

the conductive material is at least one selected from the group consisting of a carbon material and a metal material that is not alloyed with Li, and

the adhesive layer satisfies the following (A) and (B):

(A) the adhesive layer contains the conductive material in an amount of 13% by mass or more and 60% by mass or less, the polyisobutylene in an amount of 6% by mass or more and 20% by mass or less, and the polypropylene in an amount of 34% by mass or more and 75% by mass or less, based on 100% by mass in total of the conductive material and the binder; and

(B) a ratio by mass between the polyisobutylene and the polypropylene is [polyisobutylene]:[polypropylene]=1:4 to 7.

2 . The electrode film rolled web according to claim 1 , wherein a breaking strength determined by the following measurement method is 0.5 MPa or more:

(Measurement Method)

The strength of 75% of the maximum stress is defined as breaking strength, when a test piece obtained by cutting the electrode film rolled web into a size of 15 mm in width and 50 mm in length is measured under the conditions of inter-chuck distance: 30 mm and tensile speed: 100 mm/min.

3 . The electrode film rolled web according to claim 1 , wherein for a test piece thereof bonded under the following bonding condition 1, a normal-temperature adhesive strength in a 90° peeling test performed by the following measurement method is 0.03 N/cm or more:

(Measurement Method)

The strength is measured when a test piece of 15 mm in width and 50 mm in length cut out from the electrode film rolled web is peeled off by 90° at a speed of 20 mm/min after bonding a surface of the adhesive layer side of the test piece onto a center of a copper foil of 15 mm in width and 60 mm in length; An arithmetic mean value of measured values obtained by performing the same measurement three times is defined as the adhesive strength;

(Bonding Condition 1)

Roll bonding under an environment at a pressure of 8.6 kg/cm, a speed of 1 m/min, and 25° C.

4 . The electrode film rolled web according to claim 3 , wherein for a test piece thereof bonded under the following bonding condition 2, a heated adhesive strength in a 90° peeling test performed by the following measurement method is 0.10 N/cm or more:

(Measurement Method)

The strength is measured when a test piece of 15 mm in width and 50 mm in length cut out from the electrode film rolled web is peeled off by 90° at a speed of 20 mm/min after bonding a surface of the adhesive layer side of the test piece onto a center of a copper foil of 15 mm in width and 60 mm in length; An arithmetic mean value of measured values obtained by performing the same measurement three times is defined as the adhesive strength;

(Bonding Condition 2)

Roll bonding under an environment at a pressure of 8.6 kg/cm, a speed of 1 m/min, and 50° C.

5 . The electrode film rolled web according to claim 1 , wherein a SOC-OCV value determined by the following method is 18 times or more:

(Measurement Method)

An amount of the active material included in a test electrode prepared from the electrode film rolled web is calculated, and a theoretical capacity (mAh/g) of the test electrode is determined from a theoretical capacity of the active material and the amount of the active material; Then, with charging at 0.1 C for 30 minutes and pausing for 5 minutes as 1 time, the same operation is repeated 22 times in total for a coin cell for measurement; The number of times of charging until the voltage reaches 0.05 V is defined as an SOC-OCV value.

6 . The electrode film rolled web according to claim 1 , wherein the conductive material is flaky nickel particles.

7 . The electrode film rolled web according to claim 1 , wherein a release film is laminated on the adhesive layer.

8 . An electrode comprising the electrode film rolled web according to claim 1 as a material.

9 . An electrode laminate

wherein the electrode according to claim 8 , and

any one selected from the group consisting of a current collecting foil, a separator, and a solid electrolyte membrane

are laminated.

10 . An electrode laminate comprising:

the electrode according to claim 8 ;

a first member laminated on a first surface of the electrode; and

a second member laminated on a second surface of the electrode,

wherein each of the first member and the second member is any one selected from the group consisting of a current collecting foil, a separator, and a solid electrolyte membrane.

11 . An electrochemical device comprising the electrode laminate according to claim 9 .

12 . An apparatus comprising the electrochemical device according to claim 11 .