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Abstract

A lithium-ion cell includes two working electrodes which are located opposite one another and have different polarities and between which a separator which electrically insulates the working electrodes with respect to one another and is permeable to lithium ions is arranged in an electrolyte space. A lithium-containing reservoir electrode is in contact with the electrolyte space in such a way that electronic isolation is provided and lithium ions are exchanged, wherein by way of a measuring and control circuit which connects the reservoir electrode to at least one of the working electrodes a voltage can be measured between the reservoir electrode and the working electrode and a voltage can be applied between the reservoir electrode and the working electrode. The reservoir electrode is of porous design and is arranged between two insulation layers of the separator which provide electronic isolation and are permeable to lithium ions.

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