A solid electrolytic capacitor includes a capacitor element having an anode body that is a porous sintered body having a hexahedral shape, an anode lead, a dielectric layer, and a solid electrolyte layer. One end of the anode lead is embedded into the anode body from a first surface of the anode body. The anode body includes a second surface and a third surface which are opposite to each other. The anode body has a first region including the second surface, a second region including the third surface, and a third region interposed between the first region and the second region. The third region has lower density than each of the first region and the second region. An average thickness T3 of the third region and a thickness TL of the anode lead satisfy a relationship T3<TL. A surface of the anode lead is in contact with at least one of the first region and the second region.

A solid electrolytic capacitor includes a capacitor element having an anode body that is a porous sintered body having a hexahedral shape, an anode lead, a dielectric layer, and a solid electrolyte layer. One end of the anode lead is embedded into the anode body from a first surface of the anode body. The anode body includes a second surface and a third surface which are opposite to each other. The anode body has a first region including the second surface, a second region including the third surface, and a third region interposed between the first region and the second region. The third region has lower density than each of the first region and the second region. An average thickness T3 of the third region and a thickness TL of the anode lead satisfy a relationship T3<TL. A surface of the anode lead is in contact with at least one of the first region and the second region.

An electrode element (1) for an energy storage unit (200), such as a capacitor, has an electrode body (100) made of an active electrode material (E), wherein the electrode body (100) includes one or more of: at least one cavity (110) on its surface or in its interior; at least one partial volume (120) of lower density; and/or a surface coating (D) covering at least a portion of the surface of the electrode body (100), such that the surface area covered by the surface coating (D) remains unwetted when in contact with an electrolyte. Energy storage units (200) incorporating the electrode element (1) are particularly suitable for use in implantable electrotherapeutic devices.

A porous aluminum electrode has a porous layer formed by sintering aluminum powder on the surface of an aluminum core. The porous aluminum electrode, when subjected to a formation to a voltage of 200V or more, is boiled and then subjected to a first forming process in which formation is performed in an aqueous solution of ammonium adipate at a temperature of 80° C. or below and a second forming process in which formation is performed in a boric acid aqueous solution. When heat depolarization is first carried out, washing with water is performed for five minutes or more before heat depolarization; therefore, the porous layer is not destroyed.

A porous aluminum electrode has a porous layer formed by sintering aluminum powder on the surface of an aluminum core. The porous aluminum electrode, when subjected to a formation to a voltage of 200V or more, is boiled and then subjected to a first forming process in which formation is performed in an aqueous solution of ammonium adipate at a temperature of 80° C. or below and a second forming process in which formation is performed in a boric acid aqueous solution. When heat depolarization is first carried out, washing with water is performed for five minutes or more before heat depolarization; therefore, the porous layer is not destroyed.

An electrode structure and preparation methods thereof, the electrode structure includes a substrate and a sintered body, wherein the sintered body is formed on the surface of the substrate, and the sintered body is provided with cracks that are formed after the hydration treatment of the sintered body. The continuity of cracks of the electrode structure was good, and the preparation method is suitable for industrial production. The electrode structure with cracks can effectively increase the bending strength and reduce the stress during the winding process of the electrode structure, thereby reducing the risk of fracture during the application process. It can also improve the flexural strength of the electrode structure while maintaining the original high electrostatic capacity and lower leakage current value of the electrode structure, without negatively affecting the performance of the electrode structure.

Provided is a capacitor, and more preferably a hybrid capacitor, and a method of making the capacitor. The capacitor comprises an anode, with a dielectric on the anode, and a cathode with a barrier layer on the cathode. A separator, conductive polymer, liquid electrolyte and stabilizer are between the anode and

A capacitor that comprises a capacitor element that includes an anode that contains a dielectric formed on a sintered porous body, a solid electrolyte overlying the anode, and a cathode coating is provided. The cathode coating includes a noble metal layer (e.g., gold) overlying the solid electrolyte and a layer overlying the noble metal layer that includes sintered metal particles (e.g., silver particles).

A capacitor that comprises a capacitor element that includes an anode that contains a dielectric formed on a sintered porous body, a solid electrolyte overlying the anode, and a cathode coating is provided. The cathode coating includes a noble metal layer (e.g., gold) overlying the solid electrolyte and a layer overlying the noble metal layer that includes sintered metal particles (e.g., silver particles).

An example includes a capacitor case sealed to retain electrolyte, at least one anode disposed in the capacitor case, the at least one anode comprising a sintered portion disposed on a substrate, an anode conductor coupled to the substrate in electrical communication with the sintered portion, the anode conductor sealingly extending through the capacitor case to an anode terminal disposed on the exterior of the capacitor case with the anode terminal in electrical communication with the sintered portion, a second electrode disposed in the capacitor case, a separator disposed between the second electrode and the anode and a second electrode terminal disposed on an exterior of the capacitor case and in electrical communication with the second electrode, with the anode terminal and the second electrode terminal electrically isolated from one another.