Silicon ingot and manufacturing method thereof and anode material for lithium ion battery

• Main Authors: WU, HAN-ZONG, YU, WEN-HUAI
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2022
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CRYSTAL GROWTH; ELECTRICITY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

Provided is a silicon ingot and a manufacturing method thereof and an anode material for a lithium ion battery. The manufacturing method includes the following steps. A plurality of silicon crystal seeds are arranged in a heating device, wherein each of the silicon crystal seeds has a defect ratio of greater than or equal to 1%. A silicon raw material is placed on the silicon crystal seeds. The silicon crystal seeds and the silicon raw material are heated until the silicon raw material is melted into a silicon melt. The silicon melt is cooled to solidify the silicon melt into a silicon ingot.