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发明公开
CN106129417A 电池负电极及其制备方法和锂离子电池 无效 - 驳回

电池负电极及其制备方法和锂离子电池
摘要：
本发明提供了一种电池负电极及其制备方法和锂离子电池。本发明电池负电极包括集流体和涂设在所述集流体表面的负极活性材料层，所述负极活性材料层包括负极活性材料、导电剂、粘结剂，所述粘结剂包括水性粘结剂和第一羧甲基纤维素钠以及第二羧甲基纤维素钠，所述第一羧甲基纤维素钠的取代度为0.95‑1.0，所述第二羧甲基纤维素钠的取代度为0.8‑0.85，且所述第一羧甲基纤维素钠与所述第一羧甲基纤维素钠的质量比为(0.5‑0.75)：(0.5‑0.75)。本发明电池负电极活性层厚度均一性好，从而赋予电池负电极优异的综合电化学性能。
摘要（英）：

The invention provides a battery negative electrode, a preparation method thereof and a lithium ion battery. The battery negative electrode comprises a current collector and a negative electrode active material layer arranged on the surface of the current collector in a coating manner, wherein the negative electrode active material layer comprises negative electrode active materials, conductive agents and an adhesive; the adhesive contains aqueous adhesives, first sodium carboxymethylcellulose and second sodium carboxymethylcellulose; the degree of substitution of first sodium carboxymethylcellulose is 0.95-1.0; the degree of substitution of second sodium carboxymethylcellulose is 0.8-0.85; the mass ratio of first sodium carboxymethylcellulose to second sodium carboxymethylcellulose is (0.5-0.75) to (0.5-0.75). The battery negative electrode has good active layer thickness uniformity, thus endowing the battery negative electrode with excellent comprehensive electrochemical properties.

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