Negative electrode plate, electrochemical apparatus, and electronic apparatus
AssigneeNingde Amperex Technology Limited
InventorsZhihuan Chen, Daoyi Jiang, Ting Yi, Hang Cui
Life of this patent
Estimating the term…
Abstract
A negative electrode plate includes a current collector and an active substance layer provided on the current collector, where the active substance layer includes a silicon-based material, and a proportion by mass of element silicon in the active substance layer has a minimum value X1 and a maximum value X2 among different locations of a same area size, where a value of X1/X2 is M, and M≥0.7; and a weight loss rate of the active substance layer under thermogravimetric (TG) analysis within 800° C. has a minimum value Y1 and a maximum value Y2 among different locations of a same area size, where a value of Y1/Y2 is N, and N≥0.7.
Claims20
A negative electrode plate, comprising:
- a current collector;
- and
- an active substance layer provided on the current collector,
- wherein the active substance layer comprises a silicon-based material and a conductive agent, and a proportion by mass of element silicon in the active substance layer has a minimum value X1 and a maximum value X2 among different locations of a same area size, wherein a value of X1/X2 is M, and M≥0.7;
- a weight loss rate of the active substance layer under thermogravimetric (TG) analysis within 800° C. has a minimum value Y1 and a maximum value Y2 among different locations of a same area size, wherein N=Y1/Y2, and N≥0.7;
- the conductive agent comprises at least one of single-wall carbon nanotubes, multi-wall carbon nanotubes, vapor grown carbon fiber, conductive carbon black, acetylene black, Ketjen black, conductive graphite, or graphene.
An electrochemical apparatus, comprising:
- a positive electrode plate;
- a negative electrode plate;
- and
- a separator disposed between the positive electrode plate and the negative electrode plate;
- wherein the negative electrode plate comprises
- a current collector;
- and
- an active substance layer provided on the current collector,
- wherein the active substance layer comprises a silicon-based material and a conductive agent, and a proportion by mass of element silicon in the active substance layer has a minimum value X1 and a maximum value X2 among different locations of a same area size, wherein a value of X1/X2 is M, and M≥0.7;
- a weight loss rate of the active substance layer under thermogravimetric (TG) analysis within 800° C. has a minimum value Y1 and a maximum value Y2 among different locations of a same area size, wherein N=Y1/Y2, and N≥0.7;
- the conductive agent comprises at least one of single-wall carbon nanotubes, multi-wall carbon nanotubes, vapor grown carbon fiber, conductive carbon black, acetylene black, Ketjen black, conductive graphite, or graphene.
An electronic apparatus, comprising an electrochemical apparatus, wherein the electrochemical apparatus comprises a positive electrode plate;
- a negative electrode plate;
- and
- a separator disposed between the positive electrode plate and the negative electrode plate;
- wherein the negative electrode plate comprises
- a current collector;
- and
- an active substance layer provided on the current collector,
- wherein the active substance layer comprises a silicon-based material and a conductive agent, and a proportion by mass of element silicon in the active substance layer has a minimum value X1 and a maximum value X2 among different locations of a same area size, wherein a value of X1/X2 is M, and M≥0.7;
- a weight loss rate of the active substance layer under thermogravimetric (TG) analysis within 800° C. has a minimum value Y1 and a maximum value Y2 among different locations of a same area size, wherein N=Y1/Y2, and N≥0.7;
- the conductive agent comprises at least one of single-wall carbon nanotubes, multi-wall carbon nanotubes, vapor grown carbon fiber, conductive carbon black, acetylene black, Ketjen black, conductive graphite, or graphene.
Dependencies are inferred from the claim text.