The encapsulant layer is formed from a material which, upon oxidation during processing or during {HEAD ~ charging} of {TAIL ~ the electrode}, is convertible to an electrically conductive form, and which, upon discharge of the electrode, does not revert to its previous form 
The encapsulant layer is formed from a material which , upon oxidation during processing or during { HEAD ~ charging } of { TAIL ~ the electrode } , is convertible to an electrically conductive form , and which , upon discharge of the electrode , does not revert to its previous form
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