| 摘要 |
Provided is a negative electrode material for lithium ion batteries, which has a small irreversible capacity, a low resistivity and excellent output characteristics. A negative electrode active material coating material (formula (1)) for lithium ion secondary batteries, wherein A represents a functional group having an amide group (-NHCO-) and a sulfo group (-SO3X, wherein X represents an alkali metal or H), and B represents a functional group having a polar functional group. In formula (1), each of R1-R6 represents H or a hydrocarbon group having 1-10 carbon atoms. In formula (1), x and y represent the composition ratio of copolymerization, while satisfying 0 < x/(x + y) ≤ 1. |
