Toyo Kohan Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Yuma Yoshizaki

Koh Yoshioka

Etsuro Tsutsumi

Michio Kawamura

Hajime Hasegawa

Shigetaka Nagamatsu

Shinichirou Horie

Toshifumi Koyanagi

Shinichiro Horie

An electrolytic foil and a battery current collector is provided in which the risk of breakage or tearing during manufacturing presented by reduced thickness can be restrained, and which possess sufficient strength for repeated charging and discharging in a secondary battery. The electrolytic foil and the battery current collector contain a Ni—Fe alloy layer, having a thickness of 1.5 to 10 μm and having a first surface and a second surface and wherein the value of a three-dimensional surface properties parameter Sv divided by the thickness is equal to or less than 0.5 for the first surface and the second surface.

Electrolytic foil and battery current collector

Provided is a sulfide all-solid battery having an anode current collector of powerful adhesiveness which is difficult to be sulfurized. The sulfide all-solid-state battery including: a cathode layer; an anode layer; and a sulfide solid electrolyte layer disposed between the cathode layer and the anode layer, wherein the anode layer has an anode mixture layer, and an anode current collector on a face of the anode mixture layer, the face being on an opposite side of the sulfide solid electrolyte layer, the anode current collector is electrolytic iron foil that does not substantially contain other elements, and the anode current collector has surface roughness Ra of 0.2 μm to 0.6 μm, and surface roughness Rz of 2 μm to 6 μm.

Sulfide all-solid-state battery

Growing community of inventors

Kudamatsu, Japan

Yuma Yoshizaki