Negative electrode for lithium-ion secondary battery and manufacturing process for the same

摘要

A negative electrode for a lithium-ion secondary battery, has a current collector and an active-material layer bound on a surface of the current collector. The active-material layer includes active materials, binders, conductive additives, and buffer materials. The active materials include Si and/or Sn, and the buffer materials comprise a silicone composite powder in which a spherical silicone-rubber powder is covered with a silicone resin.

主权项

1. A negative electrode for a lithium-ion secondary battery, the negative electrode comprising:
a current collector; and an active-material layer being bound on a surface of said current collector, said active-material layer including an active material, a binder, a conductive additive, and a buffer material; said active material including Si and/or Sn; and said buffer material comprising a silicone composite powder in which a spherical silicone-rubber powder is covered with a silicone resin, wherein said buffer material is contained in an amount of from 1% by mass to 20% by mass when a total amount of said active-material layer is taken as 100% by mass.