US 12,749,674 B2 · Electrode and electrode manufacturing method

Abstract

An electrode according to one embodiment of the present disclosure comprises: a core material; and an electrode combined material that is layered onto surfaces of the core material. The electrode combined material comprises an active substance and PTFE. In an image illustrating a composition distribution obtained upon measuring a surface of the electrode combined material using energy dispersion-type X-ray analysis, the standard deviation of the area ratio of PTFE in 30 adjacent sections having a size of 150 μm×133 μm is 6% or less. When the electrode combined material is divided into three equal parts in the thickness direction to create, from the core material side, a first region, a second region, and a third region, the content (a) of PTFE in the first region, the content (b) of PTFE in the second region, and the content (c) of PTFE in the third region satisfy (c−a)/(a+b+c)≤±10%.

Claims5

Dependent claims

An electrode, including:

a core;
and
an electrode mixture stacked on a surface of the core, wherein
the electrode mixture includes an active material and PTFE,
in an image showing a composition distribution obtained by measuring a surface of the electrode mixture using energy-dispersive X-ray analysis, a standard deviation of an area ratio of the PTFE in adjacent 30 sections each having a size of 150 μm×133 μm is less than or equal to 6%, and
when the electrode mixture is divided into three equal parts in a thickness direction and defined as a first region, a second region, and a third region from a side of the core, a content (a) of the PTFE in the first region, a content (b) of the PTFE in the second region, and a content (c) of the PTFE in the third region satisfy (c−a)/(a+b+c)≤±10%.

3 more elements

Dependencies are inferred from the claim text.

Electrode and electrode manufacturing method

Life of this patent

Electrode and electrode manufacturing method

Life of this patent

Abstract

Claims5