リチウム二次電池用負極の製造方法,申请号JP20130556082-传众专利搜索

リチウム二次電池用負極の製造方法

申请公布号：JP5906261(B2)

申请号：JP20130556082

申请日期：2013.06.12

申请公布日期：2016.04.20

申请人：

株式会社三五;名古屋市

发明人：伊豆原浩一;大福誠;宮田康史

分类号：H01M4/1395;H01M4/134;H01M4/38;H01M4/66

主分类号：H01M4/1395

摘要：Provided is a negative electrode having a new structure for realizing a lithium secondary battery having increased charging/discharging capacities and a battery capacity that is reduced less due to repeated charging/discharging. The negative electrode for a lithium secondary battery includes a current collector substrate; a carbon nanochips layer including graphene sheets grown to incline in irregular directions independently from the current collector substrate; and a silicon thin film layer on the carbon nanochips layer, in which gaps among the carbon nanochips are formed between the silicon thin film layer and the current collector substrate. The Raman spectrum of graphite forming the carbon nanochips layer has a g/d ratio of 0.30 to 0.80, both inclusive, and the crystallinity level of the graphite is lower than that of graphite forming carbon nanowalls. The carbon nanochips layer can be formed by a plasma CVD method using a gaseous mixture of methane and hydrogen, for example.