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Xanthan and κ-carrageenan were used to prepare alkaline hydrogels to be used as electrolytes in aluminium air primary batteries. Two pasty gels were obtained starting from xanthan and KOH solutions (1M and 8M), while only the 8M KOH solution permitted the formation of a stable, elastic and gumminess hydrogel with κ-carrageenan. Discharge tests, performed on three Al/air cells assembled with Al anodes,...
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