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丁苯橡胶 (SBR) 粘结剂乳液。 标准水系负极粘结剂体系的弹性部分。SBR 提供粘附力和柔韧性,而 CMC 则提供粘度和分散性;两者结合可替代 PVDF/NMP,并彻底省去电极涂布生产线上的溶剂回收环节。
| 特性 | 数值 |
|---|---|
| 类型 | 丁苯橡胶,水性乳液 |
| 外观 | 乳白色乳胶 |
| 载体 | 水 |
| 功能 | 粘附和机械柔韧性 |
| 通常搭配 | 羧甲基纤维素钠 (CMC) |
| 典型 CMC:SBR 比例 | 干重比 1:1 至 1:2 |
| 典型粘结剂总量 | 干电极重量的 1.5–3 wt% |
完整规格书及批次特定分析证书可应要求提供。
| 体系 | 溶剂 | 典型用途 | 优势 | 权衡 |
|---|---|---|---|---|
| CMC + SBR | 水 | 石墨和硅负极 | 无需溶剂回收,低成本,安全 | 不适用于对水敏感的活性物质 |
| PVDF | NMP | 正极,部分负极 | 宽电化学窗口 | 有毒溶剂,回收成本高 |
| PAA / PAA-Na | 水 | 高硅负极 | 可耐受大体积变化 | 过度干燥易变脆 |
| LA132 / LA133 | 水 | 正极和负极 | 水系正极加工 | 供应链较窄 |
两者均不可单独使用。CMC 是一种坚硬的水溶性聚合物,用于控制浆料粘度并保持石墨分散,但仅含 CMC 的电极很脆,在辊压时容易开裂。SBR 是一种软性乳胶,能将颗粒弹性粘合在一起,但它本身无法建立粘度,会导致浆料沉降。两者的结合既能提供可涂布的浆料,又能获得柔韧的电极,且粘结剂用量仅约为 PVDF 体系的三分之一。
在 CMC 溶液和活性物质充分分散后,最后添加 SBR,并进行低剪切混合。高剪切会导致乳胶凝固形成可见颗粒,且无法重新分散。严禁冷冻 — 冷冻会造成乳液不可逆的破坏。请在阴凉处储存,并在保质期内使用。
如需报价、包装规格及当前交货周期,请联系我们。安全数据表及批次特定分析证书可应要求提供。

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