Patent ID: 8142931
Filing Date: 2012-03-27
Classification: H01M,Y02E,Y02T

Abstract:
1. A method of manufacturing a negative electrode for a nonaqueous electrolyte secondary battery, the negative electrode capable of storing and releasing lithium ions, the method comprising: A) fabricating the negative electrode by depositing a negative electrode active material on a current collector, wherein the negative electrode active material is formed on the current collector as a plurality of negative electrode active material blocks having a columnar structure; B) heat-treating the negative electrode at a temperature sufficient for achieving a high cycle retention ratio; and C) imparting lithium to the negative electrode active material after step B, wherein silicon is deposited by a vacuum film-forming method and oxygen is introduced during the deposition, so that a silicon-containing oxide is deposited on the current collector as the negative electrode active material, in step A, and step B is performed in a range of 300° C. to 600° C. inclusive, in a non-oxidizing atmosphere.