With a piece of porous separator material (it looks like white trash-bag plastic) between them, the positive and negative electrodes are sandwiched together into stacks.

用一块多孔材料(看起来像白色垃圾袋塑料)放在正极和负极中间，像块三明治。

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Zirconia cloth is an ideal separator material for the alkaline batteries.

锆纤维布是大容量碱性电池的理想隔膜材料。

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Some even confused the detection method of oil-water separator material with this detection method.

甚至有人将油水分离材料的检测方法与此混为一谈。

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But for the process to result in a working battery, all five layers must stick together and work in synchrony, and the tricky step was finding a separator material that kept the whole stack in one piece.

BBC: 'Paint-on' batteries demonstrated