There is provided a power storage device including: a power storage assembly; and a plurality of joined portions, each of the plurality of electrode plates including an electrode plate main body and a tab, the plurality of electrode plates being disposed such that the tabs are arranged in the stacking direction, the plurality of joined portions including a first joined portion configured to join the plurality of tabs to form a first bundle portion, and a second joined portion configured to join the plurality of tabs arranged in the stacking direction to form a second bundle portion, a part of the tabs in the first bundle portion and a part of the tabs in the second bundle portion being joined to the first joined portion and the second joined portion.

Anodes made from powder, such as tantalum powder, that is highly spherical is described. Methods to make the anodes are further described.

Anodes made from powder, such as tantalum powder, that is highly spherical is described. Methods to make the anodes are further described.

A stacked type capacitor without carbon paste layer includes a metal foil, an oxide layer, a polymer composite layer and a silver paste layer. The oxide layer is formed on the outer surface of the metal foil to entirely enclose the metal foil. The polymer composite layer is formed on the oxide layer to partially enclose the oxide layer. The silver paste layer is directly formed on the polymer composite layer to directly enclose the polymer composite layer. The oxide layer and the polymer composite layer are connected with each other to form a first connection interface between the oxide layer and the polymer composite layer. The polymer composite layer and the silver paste layer are connected with each other without a carbon paste layer to form a second connection interface between the polymer composite layer and the silver paste layer.

A bipolar capacitor-assisted solid-state battery is disclosed that includes a plurality of electrochemical battery unit cells, each of which includes a negative electrode, a positive electrode, and a lithium ion-conductive electrolyte-containing separator disposed between the negative electrode and the positive electrode. The lithium ion-conductive electrolyte-containing separator of each electrochemical battery unit cell comprises a solid-state electrolyte material, and, additionally, at least one negative electrode of the electrochemical battery unit cells or at least one positive electrode of the electrochemical battery unit cells includes a capacitor material. The bipolar capacitor-assisted solid-state battery further includes a bipolar current collector disposed between a negative electrode of one electrochemical battery unit cell and a positive electrode of an adjacent electrochemical battery unit cell. A method for manufacturing the disclosed bipolar capacitor-assisted solid-state battery is also disclosed.

The disclosed technology generally relates to energy storage devices, and more particularly to energy storage devices comprising frustules. According to an aspect, a supercapacitor comprises a pair of electrodes and an electrolyte, wherein at least one of the electrodes comprises a plurality of frustules having formed thereon a surface active material. The surface active material can include nanostructures. The surface active material can include one or more of a zinc oxide, a manganese oxide and a carbon nanotube.

Provided is a sheet-shaped nitrogen-phosphorus co-doped porous carbon material, prepared and obtained according to the following method: mixing aniline and hexachlorocyclotriphosphazene, undergoing a closed reaction for 2-24 h at a pressure of 1-10 MPa and a temperature of 140-260 C., then pressure is released to atmospheric pressure and steam drying is performed to obtain a solid substance; under inert gas protection, the obtained solid substance is treated for 1-6 h at a high temperature of 400-1000 C., and the finished product is obtained; the sheet-shaped nitrogen-phosphorus co-doped porous carbon material thus provided has excellent electrical properties and may be used for fabricating capacitor electrodes and especially supercapacitor electrodes; thus it may be used in capacitors and especially supercapacitors, and has great application potential and industrial value in the field of energy storage.

A method for depassivation of an energy storage device having an anode, a cathode and a core with an electrolyte, the method including: detecting that a first predetermined event related to a buildup of passivation has occurred with regard to the energy storage device; switching between a positive input voltage and a negative input voltage provided to the anode at a frequency sufficient to depassivate the anode; discontinuing the switching when a second predetermined event related to passivation has occurred.

A capacitor includes an electrode assembly, having at least one positive electrode, at least one negative electrode, and at least one dielectric or separator interposed between the positive electrode and the negative electrode, and a case for receiving the electrode assembly. The electrode assembly is configured such that the positive electrode, the negative electrode, and the dielectric or the separator are arranged in a horizontal direction, which is perpendicular to the thickness direction of the electrode assembly, and such that the positive electrode and the negative electrode have a complementary pattern.

A capacitor includes an electrode assembly, having at least one positive electrode, at least one negative electrode, and at least one dielectric or separator interposed between the positive electrode and the negative electrode, and a case for receiving the electrode assembly. The electrode assembly is configured such that the positive electrode, the negative electrode, and the dielectric or the separator are arranged in a horizontal direction, which is perpendicular to the thickness direction of the electrode assembly, and such that the positive electrode and the negative electrode have a complementary pattern.