Abstract: An electrode active material composite particle is a composite particle containing a plurality of silicon particles and a binder. In the electrode active material composite particle, the binder contains a fluorine-based polymer and a non-fluorine-based polymer. In the electrode active material composite particle, a content ratio of the fluorine-based polymer in an inner region of the composite particle is greater than a content ratio of the fluorine-based polymer in an outer region of the composite particle, and a content ratio of the non-fluorine-based polymer in the outer region of the composite particle is greater than a content ratio of the non-fluorine-based polymer in the inner region of the composite particle. An electrode composite contains the electrode active material composite particle. A battery includes an electrode active material layer, and the electrode active material layer contains the electrode composite.

Abstract: The present disclosure provides an electrode active material composite particle and a method for manufacturing the electrode active material composite particle that can suppress a change in volume of a battery, an electrode mixture including such an electrode active material composite particle, and a battery containing such an electrode mixture. An electrode active material composite particle according to the present disclosure includes a particulate electrode active material and a non-fibrous filler. In the electrode active material composite particle according to the present disclosure, the particulate electrode active material includes an alloy-based electrode active material, the non-fibrous filler constitutes one or a plurality of aggregates, and the one or plurality of aggregates and the particulate electrode active material constitute a composite particle.

Abstract: The present disclosure provides an electrode active material composite particle and a method for manufacturing the electrode active material composite particle that can suppress a change in volume of a battery, an electrode mixture including such an electrode active material composite particle, and a battery containing such an electrode mixture. An electrode active material composite particle according to the present disclosure includes a particulate electrode active material and a fibrous filler. In the electrode active material composite particle according to the present disclosure, the particulate electrode active material includes an alloy-based electrode active material, the fibrous filler constitutes a plurality of aggregates, and the plurality of aggregates and the particulate electrode active material constitute a composite particle.

Abstract: A manufacturing method for a secondary battery and a manufacturing apparatus for a secondary battery that are applicable to a secondary battery in which an electrolyte solution injection hole has a diameter of 1.5 mm or more are provided. The secondary battery includes a battery case including a cover plate provided with an electrolyte solution injection hole, and a sealing member sealing the electrolyte solution injection hole. The manufacturing method includes a preparing step and a press-fitting step. The preparing step is preparing a cell in which, after an electrolyte solution is injected to the battery case through the electrolyte solution injection hole, the sealing member is disposed on the electrolyte solution injection hole. The press-fitting step is press-fitting the sealing member into the electrolyte solution injection hole while applying press-fitting load and ultrasonic vibration with a frequency of 20 kHz or more in parallel to a press-fitting direction.

Abstract: A manufacturing method for a secondary battery and a manufacturing apparatus for a secondary battery that are applicable to a secondary battery in which an electrolyte solution injection hole has a diameter of 1.5 mm or more are provided. The secondary battery includes a battery case including a cover plate provided with an electrolyte solution injection hole, and a sealing member sealing the electrolyte solution injection hole. The manufacturing method includes a preparing step and a press-fitting step. The preparing step is preparing a cell in which, after an electrolyte solution is injected to the battery case through the electrolyte solution injection hole, the sealing member is disposed on the electrolyte solution injection hole. The press-fitting step is press-fitting the sealing member into the electrolyte solution injection hole while applying press-fitting load and ultrasonic vibration with a frequency of 20 kHz or more in parallel to a press-fitting direction.

Abstract: This alkaline storage battery cathode is provided with: nickel hydroxide particles covered by a cobalt-compound coating layer; a zinc compound; and an yttrium compound and/or an ytterbium compound. The zinc compound and the yttrium compound and/or ytterbium compound are blended at a blend ratio that is in accordance with the ratio of the capacity characteristics of the alkaline storage battery and the output characteristics of the alkaline storage battery.

Abstract: This alkaline storage battery cathode is provided with: nickel hydroxide particles covered by a cobalt-compound coating layer; a zinc compound; and an yttrium compound and/or an ytterbium compound. The zinc compound and the yttrium compound and/or ytterbium compound are blended at a blend ratio that is in accordance with the ratio of the capacity characteristics of the alkaline storage battery and the output characteristics of the alkaline storage battery.