An aqueous electrolyte solution, a power storage device filled with the aqueous electrolyte solution, and a manufacturing method of the power storage device are illustrated. The aqueous electrolyte solution comprises alkali metal cations of different types. With the hydration enthalpy of the alkali metal cations of the different types, a simulated boiling point of the aqueous electrolyte solution is higher than the 105° C. of the conventional aqueous electrolyte solution. After processed by the reflow furnace at 250° C., the power storage device has no cracks found on its appearance, which meets the electrical requirements, and overcomes the problem of bursting of the power storage device filled with conventional aqueous electrolyte solution. The housing of the power storage device adopts liquid crystal polymer, and/or the power storage device is firstly vacuumed and then packaged, therefore increasing coulombic efficiency of electrical testing of the power storage device.

An aqueous electrolyte solution, a power storage device filled with the aqueous electrolyte solution, and a manufacturing method of the power storage device are illustrated. The aqueous electrolyte solution comprises alkali metal cations of different types. With the hydration enthalpy of the alkali metal cations of the different types, a simulated boiling point of the aqueous electrolyte solution is higher than the 105° C. of the conventional aqueous electrolyte solution. After processed by the reflow furnace at 250° C., the power storage device has no cracks found on its appearance, which meets the electrical requirements, and overcomes the problem of bursting of the power storage device filled with conventional aqueous electrolyte solution. The housing of the power storage device adopts liquid crystal polymer, and/or the power storage device is firstly vacuumed and then packaged, therefore increasing coulombic efficiency of electrical testing of the power storage device.

A capacitor element that has an anode body, a dielectric oxide film layer covering the anode body, and a cathode body formed on the dielectric oxide film layer; an exterior body that covers the capacitor element; a contact layer that is on an anode terminal, which is an end portion of the anode body, and has a surface with a predetermined surface roughness; and an anode-side electrode layer that covers the surface are provided.

A capacitor element that has an anode body, a dielectric oxide film layer covering the anode body, and a cathode body formed on the dielectric oxide film layer; an exterior body that covers the capacitor element; a contact layer that is on an anode terminal, which is an end portion of the anode body, and has a surface with a predetermined surface roughness; and an anode-side electrode layer that covers the surface are provided.

A capacitor and capacitor assemblies are provided, configured to prevent damage from shock and/or vibration. A capacitor assembly according to the invention comprises an anode plate having an anode plate wire extending from a surface of the anode plate. An anode wire holder is positioned around at least a portion of the anode plate wire. A wire separator comprising a channel is provided, at least a portion of the anode plate wire received within the channel. Methods of forming capacitors and capacitor assemblies are also provided.

A capacitor and capacitor assemblies are provided, configured to prevent damage from shock and/or vibration. A capacitor assembly according to the invention comprises an anode plate having an anode plate wire extending from a surface of the anode plate. An anode wire holder is positioned around at least a portion of the anode plate wire. A wire separator comprising a channel is provided, at least a portion of the anode plate wire received within the channel. Methods of forming capacitors and capacitor assemblies are also provided.

A capacitor with a seat plate includes a capacitor main body and a seat plate that holds the capacitor main body. The capacitor main body includes a capacitor element, a case having an opening for housing the capacitor element, a sealing member that closes the opening of the case, and a plurality of lead terminals each penetrating the sealing member and the seat plate. The seat plate includes a heat dissipation member, and has a first surface and a second surface opposite to the first surface. The heat dissipation member is exposed at the first surface and the second surface. The capacitor element is disposed at a side close to the second surface of the seat plate. The case is in contact with a region of the heat dissipation member. The region of the heat dissipation member is exposed at the second surface.

A solid electrolytic capacitor capable of improving manufacturing yield is provided. A solid electrolytic capacitor according to one aspect of the present disclosure includes an anode lead-out wire and a capacitor element in which the anode lead-out wire is embedded. The cross section of at least a part of the anode lead-out wire in a direction in which the anode lead-out wire is extended has a flat shape, and a recess provided in a central part, a first linear part that is extended outward from one side of the recess, and a second linear part that is extended outward from another side of the recess are formed in at least one of an upper surface and a lower surface of the anode lead-out wire having the flat shape.

A solid electrolytic capacitor element that includes: an anode plate having a first main surface and a second main surface which oppose each other in a thickness direction thereof, and made of a valve-action metal; a porous layer on at least one main surface of the anode plate; a dielectric layer on a surface of the porous layer; a cathode layer including a solid electrolyte layer on a surface of the dielectric layer; and a stress relaxation layer, wherein in a plan view of the first main surface, at least a portion of the stress relaxation layer overlaps with the anode plate, and the portion of the stress relaxation layer does not overlap with the cathode layer.

A solid electrolytic capacitor element that includes: an anode plate having a first main surface and a second main surface which oppose each other in a thickness direction thereof, and made of a valve-action metal; a porous layer on at least one main surface of the anode plate; a dielectric layer on a surface of the porous layer; a cathode layer including a solid electrolyte layer on a surface of the dielectric layer; and a stress relaxation layer, wherein in a plan view of the first main surface, at least a portion of the stress relaxation layer overlaps with the anode plate, and the portion of the stress relaxation layer does not overlap with the cathode layer.