US 8,574,768 B2 · Power storage device

Abstract

An embodiment of the present invention relates to a power storage device which includes a positive electrode having a positive-electrode current collector with a plurality of first projections, a first insulator provided over each of the plurality of first projections, and a positive-electrode active material provided on a surface of the first insulator and the positive-electrode current collector with the plurality of first projections; a negative electrode having a negative-electrode current collector with a plurality of second projections, a second insulator provided over each of the plurality of second projections, and a negative-electrode active material provided on a surface of the second insulator and the negative-electrode current collector with the plurality of second projections; a separator provided between the positive electrode and the negative electrode; and an electrolyte provided in a space between the positive electrode and the negative electrode and containing carrier ions.

Claims17

Dependent claims

A power storage device comprising:

a positive electrode including:
a positive-electrode current collector with a plurality of first projections;
a first insulator provided on each of the plurality of first projections;
and
a positive-electrode active material provided on the first insulator and the positive-electrode current collector;
a negative electrode including:
a negative-electrode current collector with a plurality of second projections;
a second insulator provided on each of the plurality of second projections;
and
a negative-electrode active material provided on the second insulator and the negative-electrode current collector;
a separator provided between and in contact with the positive electrode and the negative electrode;
and
an electrolyte provided in a first space between the positive electrode and the separator, and a second space between the negative electrode and the separator,
wherein the electrolyte contains carrier ions,
wherein a width of the first insulator is larger than a width of each of the plurality of first projections, and
wherein each of the first insulator and the second insulator has a curved upper surface and a flat bottom surface.

13 more elements

A power storage device comprising:

a positive electrode including:
a positive-electrode current collector;
a positive-electrode active material provided on the positive-electrode current collector;
a negative electrode including:
a negative-electrode current collector with a plurality of first projections;
a first insulator provided on each of the plurality of first projections;
and
a negative-electrode active material provided on the first insulator and the negative-electrode current collector;
a separator in contact with the positive electrode and the negative electrode;
and
an electrolyte provided between the positive electrode and the separator, and in a space between the negative electrode and the separator,
wherein the electrolyte contains carrier ions,
wherein a width of the first insulator is larger than a width of each of the plurality of first projections, and
wherein the first insulator has a curved upper surface and a flat bottom surface.

11 more elements

Dependencies are inferred from the claim text.

Power storage device

Life of this patent

Power storage device

Life of this patent

Abstract

Claims17