Rechargeable electro chemical battery cell

Rechargeable electrochemical battery cell having a negative electrode (5), an electrolyte, a positive electrode (4) and a reservoir for storing active metal (24) resulting from an electrode reaction at the negative electrode (5) during the charging of the cell,

• wherein
• the cell contains a porous structure (13), which
• comprises the active mass (17) of the positive electrode and
• is arranged in the vicinity of an electronically conductive substrate (12) of the negative electrode (5) such that at least a part of the active metal (24) resulting from the electrode reaction at the negative electrode penetrates into the pores (14) of the porous structure (13) comprising the active mass (17) of the positive electrode (4) and is stored therein;
• and
• the active metal (24) is stored, at least in part, by deposition in metallic form in the pores (14) of the porous structure (13) comprising the active mass (17) of the positive electrode.