Patent ID: 11955642
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An electrode comprising:
a current collector; and
an active material-containing layer supported on the current collector and comprising an active material comprising niobium-titanium composite oxide, a conductive agent, cellulose fiber, a binder, first agglomerates, and second agglomerates, and the conductive agent comprising carbon fiber, wherein:
the active material-containing layer comprises a first surface brought into contact with the current collector, and a second surface which is a reverse face of the first surface; and
400/mm2 to 2000/mm2 of the first agglomerates are present on the second surface, the first agglomerates comprises the carbon fiber and the cellulose fiber, do not comprise the active material, and have a longest diameter of 5 μm or more and a shortest diameter of 1 μm or more,
wherein 4500/mm2 or more of the second agglomerates are present on the first surface; and the second agglomerates comprise the carbon fiber and the cellulose fiber, do not comprise the active material, and have a longest diameter of 2 μm or more and a shortest diameter of 1 μm or more, and
wherein the binder is at least one selected from the group consisting of styrene-butadiene rubber, styrene-acrylate resins, acrylic resins, urethane resins, polytetrafluoroethylene, fluororubber, polyimide resin, core-shell binder, and carboxymethyl cellulose.