Abrégé

An embodiment provides: a negative electrode active material for a lithium secondary battery, wherein the negative electrode active material has silicon nanoparticles distributed in a silicon alloy and contains a Si—Al—Ni—B composition; and a method for producing same. Accordingly, a negative electrode active material for a lithium secondary battery can be provided, wherein the negative electrode active material has a controlled volume expansion rate and excellent electrical properties.

Classes IPC  ?

• H01M 4/46 - Alliages à base de magnésium ou d'aluminium
• H01M 4/02 - Électrodes composées d'un ou comprenant un matériau actif
• H01M 4/36 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs
• H01M 10/052 - Accumulateurs au lithium
• H01M 50/109 - Boîtiers primairesFourreaux ou enveloppes caractérisés par leur forme ou leur structure physique en forme de bouton ou plate

Abrégé

According to an embodiment of the present disclosure, it is possible to provide an effect of reducing overall process costs by minimizing the number of process steps, an effect of ensuring predetermined radial crushing strength by performing an encapsulation process by using low-pressure insert injection molding without an impregnation process, and an effect of providing a toroidal magnetic core having magnetic properties that less decrease.

Classes IPC  ?

• H01F 41/00 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques
• H01F 3/08 - Noyaux, culasses ou induits en poudre

Abrégé

There is provided a production method for a laminated coil, the production method including: a process of producing a coil part of one axis by stacking a flat coil in an axial direction, a process of bending the flat coil of a connection portion in an extended state thereof in a length direction to allow for the division of a first coil part and a second coil part, wherein the connection portion connecting two coil parts is produced by bending the flat coil of the connection portion, and a process of finally spreading the bent connection portion, such that the first coil part and the second coil part may be disposed to be parallel in the same direction on the same plane.

Classes IPC  ?

• H01F 41/061 - Enroulement de feuilles ou de fils conducteurs plats
• H01F 41/082 - Dispositifs de guidage ou de positionnement du matériau enroulé sur la forme d’enroulement
• H01F 27/28 - BobinesEnroulementsConnexions conductrices
• H01F 41/074 - Enroulement de bobines plates
• H01F 41/064 - Enroulement de fils conducteurs non plats, p. ex. de tiges, de câbles ou de cordes