A button cell includes a housing having a metal cell cup and a metal cell top. The button cell is a secondary lithium ion cell. An electrode winding disposed within the housing is formed from a multi-layer assembly that is wound in a spiral shape about an axis. The multi-layer assembly including a positive electrode, a negative electrode, and a separator disposed between the electrodes. A first conductor is provided that includes a strip-shaped portion that lies flat between a first end side of the electrode winding and a first of the cell cup and cell top. A second conductor is provided that includes a strip-shaped second portion that lies flat between a second end side of the electrode winding and a second of the cell cup and cell top. The first conductor and the second conductor are metal foils.

A silicon-based composite that includes silicon-based particles and one or more doping metals selected from the group consisting of Mg, Ca, Al, Na and Ti is provided. In the silicon-based particles, there is a doping metal concentration gradient from the particle center toward the particle surface.

A three dimensional (3D) In-Silicon energy storage device is provided by a method that includes forming a thick dielectric material layer on a surface of a silicon based substrate. A 3D trench is then formed into the dielectric material layer and the silicon based substrate, and thereafter a dielectric material spacer is formed, in addition to the dielectric remaining on the field of the substrate, as well as along a sidewall of the 3D trench, and on a first portion of a sub-surface of the silicon based substrate that is present at a bottom of the 3D trench. A second portion of the sub-surface of the silicon based substrate that is present in the 3D trench remains physically exposed. Active energy storage device materials can then be formed laterally adjacent to the dielectric material spacer that is within the 3D trench and on the dielectric material layer.

A method for producing a button cell includes: providing a metal cell cup having a cell cup plane region; providing a metal cell top having a cell top plane region; providing a cylindrical electrode winding, the electrode winding being a multi-layer assembly wound in a spiral shape, the multi-layer assembly including an electrode formed from a current collector; connecting a conductor to the current collector; placing the electrode winding into the cell top; inserting the cell top into the cell cup to form a housing in which a strip-shaped portion of the conductor lies flat between (i) an end side of the electrode winding and (ii) a plane region of the cell cup plane region or the cell top plane region; and welding, after forming the housing, the strip-shaped portion of the conductor to a surface of the plane region located in the interior of the housing.

A structure for sealing a button-type lithium cell includes a cell cover, a sealing ring and a cell casing. The cell cover includes an overlapping structure. The overlapping structure includes a first overlapping portion, a second overlapping portion and a third overlapping portion and the third overlapping portion includes a locking portion and a sealing portion. The cell casing includes a sealing structure. The sealing structure includes a first sealing portion, a second sealing portion, a third sealing portion and a fourth sealing portion. The first overlapping portion abuts against the fourth sealing portion through the sealing ring, the second overlapping portion abuts against the third sealing edge through the sealing ring, the locking portion of the third overlapping portion abuts against the second sealing edge through the sealing ring, and the sealing portion of the third overlapping portion abuts against the first sealing edge through the sealing ring.

A system for a high temperature, high energy density secondary battery that includes an electrolyte comprising an ionic liquid solvent, and electrolyte salts; a metallic anode; a cathode, compatible with the electrolyte and comprising an active material and a polyimide binder; and a separator component that separates the cathode and anode.

An energy storage element includes a housing enclosing an interior space, which housing is formed of a first metal housing part and a second metal housing part and has a substantially circular upper side and a substantially circular lower side spaced from one another and parallel to one another, and an annular housing side that connects the upper side and the lower side; a winding arranged in the interior, which winding includes a strip-shaped positive and a strip-shaped negative electrode and a strip-shaped separator arranged between the electrodes that are wound in a spiral around a winding axis; wherein the winding has a first end face and a second end face and an annularly circumferential winding outer side, the first and second end faces face in the direction of the circular and mutually parallel upper side and lower side such that the winding axis is oriented perpendicular or at least substantially perpendicular to the upper side and the lower side, and the winding has an axial cavity through which the winding axis runs; and an electrically conductive pin arranged in the cavity and electrically connects one of the electrodes of the winding to one of the housing parts, wherein the first and the second housing part are designed such that they are able moveable against each other along an axis running vertically through the circular upper side and the circular lower side of the housing, and the pin is configured such that the electrical contact to one of the electrodes of the winding is broken when the housing parts move away from one another along the axis.

A cell, in particular a button cell, and to a method for manufacturing such a cell, the method includes providing a first part and a second part intended to respectively form the lid and the cup of the housing, the first part including an edge area with a zone inclined or perpendicular with respect to a center axis of the housing; applying a layer of adhesive on the edge area of the first part; then inserting the first part into an open end of the second part, the layer of adhesive on the edge area being finally turned towards the open end of the second part; closing the housing by bending an upper portion of the side wall on the zone of the edge area provided with the layer of adhesive, and curing the layer of adhesive to form an adhesive joint sealing the housing.

A positive electrode for a lithium secondary battery including a goethite having urchin shape as a positive electrode additive and a lithium secondary battery including the same. If the goethite having the urchin shape is applied to the positive electrode of the lithium secondary battery, there are effects that increase the charging/discharging efficiency of the battery and improve the lifetime characteristics, by adsorbing lithium polysulfide (LiPS) generated during the charging/discharging process of the battery.

An electrochemical cell includes an electrode body that has a plurality of electrodes stacked on each other in a direction of a battery axis O, and an exterior body that has a first laminate member and a second laminate member, and that internally accommodates the electrode body. The exterior body includes an accommodation portion that internally accommodates the electrode body, and a sealing portion in which the first laminate member and the second laminate member are joined to each other in a state where the first laminate member and the second laminate member overlap each other so as to seal an inside of the accommodation portion. The accommodation portion includes a top wall portion and a bottom wall portion which face each other with the electrode body interposed therebetween in the direction of the battery axis, and a cylindrical peripheral wall portion which surrounds the electrode body from an outer side in a radial direction. The sealing portion is formed into a cylindrical shape which is bent along the peripheral wall portion and surrounds the peripheral wall portion over an entire periphery from the outer side in the radial direction, and is in contact with the peripheral wall portion from the outer side in the radial direction.