Envision Aesc Energy Devices Ltd.

Nec Energy Devices, Ltd.

Envision Aesc Enerev Devices Ltd.

Envision Aesc Japan Ltd.

Masanori Hirai

Tetsuya Sato

Hiroo Takahashi

Takashi Nakajima

Masaaki Matsuu

Kouzou Takeda

Yoshimasa Yamamoto

Kazuya Mimura

Akio Ukita

An electrode for an electrochemical device has a coated portion in which an active material layer is formed on a current collector; a non-coated portion in which the active material layer is not formed; and a resin layer that is laminated such that the coated portion and a portion of the non-coated portion are covered; wherein: the resin layer has a high-permeability portion having high ion permeability and positioned on the coated portion; a low-permeability portion having low ion permeability and positioned on a portion of the non-coated portion; and a transition portion in which ion permeability decreases from the high-permeability portion side toward the low-permeability portion side and positioned between the high-permeability portion and the low-permeability portion.

Electrode for electrochemical device, electrochemical device, and method for manufacturing same

A coating device has: a die head that is provided with a supply port into which a coating slurry is supplied, a manifold that stores the coating slurry, and a slit that dispenses the coating slurry; a supply pipe that is connected to the supply port of the die head; and a cover plate that is provided in the supply port or the supply pipe and that reduces the flow rate of the coating slurry at the center of a cross-section that is orthogonal to the direction in which the coating slurry in the supply port or the supply pipe flows into the die head.

Coating device and coating method

An electrode for a secondary battery including an electrode laminated assembly that has a configuration in which electrodes and a separator are laminated, includes current collectorand active material layerformed on a surface of current collector. Active material layerincludes a thick-layer portion and a thin-layer portion that is positioned at an edge portion of the active material layer and that is smaller in thickness than the thick-layer portion, and is formed by discharging slurry containing an active material from discharge portof die headtoward the surface of current collector, the slurry being supplied to die headthrough coating valve. At the time of the formation of the thin-layer portion of active material layer, the slurry supplied through coating valvehaving a smaller opening amount than at the time of the formation of the thick-layer portion is discharged toward current collectorfrom discharge portthat is closer to current collectorthan at the time of the formation of the thick-layer portion.

Production method and production apparatus of electrode for secondary battery, electrode for secondary battery, and secondary battery

Provided is a secondary battery with a high electric characteristic and reliability that prevents the short circuit between a positive electrode and a negative electrode by an insulating member and that prevents or reduces the volume increase and deformation of a battery electrode assembly. A secondary battery includes a battery electrode assembly in which positive electrodeand negative electrodeare alternately laminated while separatoris interposed therebetween. Positive electrodeand negative electrodeinclude current collectorsand active materials, each surface of current collectorsis provided with an application portion and a non-application portion of active materials, and the active materialsinclude a thin portion whose thickness is small. A charging capacity ratio A/C between negative electrodeand positive electrodethat face each other at an outer edge portion containing the thin portion is greater than the charging capacity ratio A/C between negative electrodeand positive electrodethat face each other at a center side with respect to the outer edge portion.

Secondary battery

Growing community of inventors

Kanagawa, Japan

Masanori Hirai