Electrochemical apparatus and electronic apparatus

1 . An electrochemical apparatus, comprising: a positive electrode, a negative electrode, and an electrolyte; wherein the negative electrode comprises a negative electrode current collector and a negative electrode active substance layer formed on the negative electrode current collector;

wherein

the negative electrode current collector has a tensile strength of F N/mm 2 , wherein F is greater than 400;

wherein a weight per unit area of the negative electrode active substance layer is W mg/cm 2 , wherein W is within a range of 3 to 12;

wherein a density of the negative electrode active substance layer is D g/cm 3 , and D is within a range of 1.7 to 2.0, wherein 900≤F×D≤1200;

wherein the electrolyte comprises a compound having cyano group, and wherein based on a weight of the electrolyte, a content percentage of the compound having cyano group is b % and b is within a range of 3.5 to 10,

wherein the negative electrode current collector comprises copper and a first metal, the first metal comprises silver and tin, and based on the weight of the negative electrode current collector, a content percentage of the first metal is a %, wherein a is within a range of 0.01 to 0.5;

wherein the negative electrode current collector further comprises at least one rare earth element, and the rare earth element comprises yttrium.

2 . The electrochemical apparatus according to claim 1 , wherein 4≤F×a≤200.

3 . The electrochemical apparatus according to claim 1 , wherein 100/3≤F/W≤200.

4 . The electrochemical apparatus according to claim 1 , wherein the negative electrode current collector has at least one of the following characteristics:

1) An average surface roughness is 0.05 μm to 1.5 μm;

2) a 0.2% endurance is greater than 30 N/mm 2 ; or

3) a thickness is 1 μm to 100 μm.

5 . The electrochemical apparatus according to claim 1 , wherein the negative electrode active substance layer has at least one of the following characteristics:

a) a reflectance Ra at a wavelength of 550 nm is 7% to 15%; or

b) a porosity Pa is 20% to 40%.

6 . The electrochemical apparatus according to claim 1 , wherein the electrolyte further comprises at least one of the following compounds:

i. propionate;

ii. lithium difluorophosphate; or

iii. a compound of Formula 1:

wherein,

W is

each L is independently a single bond or methylene;

m is 1, 2, 3, or 4; and

n is 0, 1, or 2.

7 . The electrochemical apparatus according to claim 6 , wherein the compound of Formula 1 comprises at least one of the following compounds:

8 . The electrochemical apparatus according to claim 6 , wherein 1≤b/a≤300.

9 . The electrochemical apparatus according to claim 6 , wherein 0.5≤W/b≤24.

10 . An electronic apparatus, comprising: an electrochemical apparatus; wherein the electrochemical apparatus comprises a positive electrode, a negative electrode, and an electrolyte; the negative electrode comprises a negative electrode current collector and a negative electrode active substance layer formed on the negative electrode current collector;

wherein the negative electrode current collector has a tensile strength of F N/mm 2 , wherein F is greater than 400;

wherein a weight per unit area of the negative electrode active substance layer is W mg/cm 2 , wherein W is within a range of 3 to 12;

wherein a density of the negative electrode active substance layer is D g/cm 3 , and D is within a range of 1.7 to 2.0, wherein 900≤F×D<1200;

wherein the electrolyte comprises a compound having cyano group, and wherein based on a weight of the electrolyte, a content percentage of the compound having cyano group is b % and b is within a range of 3.5 to 10,

wherein the negative electrode current collector comprises copper and a first metal, the first metal comprises silver and tin, and based on the weight of the negative electrode current collector, a content percentage of the first metal is a %, wherein a is within a range of 0.01 to 0.5; and

wherein the negative electrode current collector further comprises at least one rare earth element, and the rare earth element comprises yttrium.

11 . The electronic apparatus according to claim 10 , wherein 100/3≤F/W≤200.

12 . The electronic apparatus according to claim 10 , wherein the negative electrode current collector has at least one of the following characteristics:

1) An average surface roughness is 0.05 μm to 1.5 μm;

2) a 0.2% endurance is greater than 30 N/mm 2 ; or

3) a thickness is 1 μm to 100 μm.

13 . The electrochemical apparatus according to claim 1 , wherein b is within a range of 7.5 to 10.