Toyota Jidosha Kabushiki Kaisha

Manabu Imano

Yohei Shindo

Mayuko Osaki

Hidenori Miki

Yasumasa Oguma

Hideyuki Koga

Taishi Shiotsuki

The battery of the present disclosure comprises a plurality of electrode bodies, wherein one of the electrode bodies and another of the electrode bodies are connected via a conductive material, each of the electrode bodies includes a metal current collector, an active material layer, and an electrolyte layer, the metal current collector has a connection surface which contacts the conductive material and a laminate surface which contacts the active material layer, and a ten-point average roughness of the laminate surface is less than a ten-point average roughness of the connection surface. According to the battery of the present disclosure, both adhesion between the metal current collector and the active material layer in the electrode body and connectivity between the electrode bodies via the conductive material can be achieved.

Battery and battery production method

An all-solid-state battery having an olivine-type positive electrode active material and a sulfur solid electrolyte and a method for producing the all-solid-state battery is provided. The positive electrode active material is a positive electrode active material in which primary particles aggregate into secondary particles. The primary particles have an olivine-type positive electrode active material and a coating layer that coats all or a portion of the olivine-type positive electrode active material. The coating layer contains a transition metal derived from the olivine-type positive electrode active material, lithium, phosphorous and oxygen as components thereof, and the concentration of the transition metal is lower the concentration of the olivine-type positive electrode active material. A transition metal-containing sulfide region with a thickness of 10 nm or less and having sulfur and the transition metal derived from the olivine-type positive electrode active material is present on the surface of the secondary particles.

Positive electrode active material, all-solid-state battery and method for producing all-solid-state battery

The all-solid-state battery system that has an all-solid-state battery, the all-solid-state battery having a positive electrode active material layer, a solid electrolyte layer and a negative electrode active material layer, and a control device that controls the lower limit discharge potential of the positive electrode active material layer of the all-solid-state battery. The positive electrode active material layer and/or the solid electrolyte layer have a sulfide solid electrolyte. In addition, the positive electrode active material layer has an olivine-type positive electrode active material. In addition, the capacity of the negative electrode active material layer is lower than the capacity of the positive electrode active material layer. In addition, the control device controls the lower limit discharge potential of the positive electrode active material layer during normal use of the all-solid-state battery to within the range of 1.6 V vs. Li/Lito 2.1 V vs. Li/Li.

Growing community of inventors

Hadano, Japan

Manabu Imano