AGM --- high low surface-area composite

With the preceding as background, a two-layered AGM separator was evaluated in a further ALABC project [19,20]. This separator consisted of a layer of 100% fine fibres (high surface area) and a second layer made of a mixture of 40% fine fibres with the addition of coarse fibres and chopped structural fibres (low surface area) [21]. Both the positive and negative plates were wrapped by this separator, with the 100% fine-fibre layer facing the electrodes the cell configuration is shown 

Fibre ratio fine (%)/coarse (%) Separator type Average pore size (pm) Tensile strength (kNm ) 

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