Abstract: An electric bicycle includes an electric drive, at least one frame tube having an interior, an electrical energy store arranged in the interior of the frame tube, and a holding device configured to establish a connection between the electrical energy store and the frame tube. The frame tube in the interior has a receiving portion for receiving the electrical energy store. The holding device is configured to fix the electrical energy store in the interior to the frame tube and has no electrical contacts. Additionally, the holding device fixes the electrical energy store in the frame tube at least by a radial force, and the holding device is connected to the electrical energy store without a screw connection.

Abstract: An anode for a galvanic cell is constructed from an anode material containing a main component, which releases lithium ions during a discharge process of the galvanic cell, and at least one additive. The at least one additive has an electrochemical potential which is higher with respect to elemental lithium than an electrochemical potential of the main component with respect to elemental lithium. The at least one additive has a charging capacity and a discharging capacity, and the charging capacity does not deviate from the discharging capacity by more than 10%.

Abstract: A metal-oxygen battery system, in particular a lithium-oxygen battery system, includes at least one battery cell, in particular a lithium-oxygen cell, including an oxygen cathode, a metal anode, and a metal ion-conducting separator situated between the cathode and the anode. To increase the current carrying capacity, the battery system also includes a turbomachine system which is connected to the oxygen cathode in a gas-conducting manner and which may be switched over between a suction function and a blowing function, and/or an exhaust gas supply line for supplying a gas low in oxygen to the oxygen cathode. Also described is a corresponding operating method.

Abstract: An electrochemical energy store (10), comprising a housing (12) for accommodating at least one cell unit (24), wherein the housing (12) forms a receptacle space for the arrangement of the cell unit (24), wherein a surface (17) of the housing (12) facing the receptacle space is completely covered by an electrically insulating material (27), wherein the housing (12) also comprises an opening (20) for filling a fluid electrolyte into the receptacle space, and wherein the opening (20) is covered by two overlapping end regions (26, 28) of the electrically insulating material (27). An energy store (10) according to the invention permits a simple means of bringing about sealed internal insulation of a housing (12) accompanied by simultaneously improved manufacturability.

Abstract: A battery cell includes a negative electrode and a positive electrode. The battery cell also contains a thermally expandable graphite intercalation compound.

Abstract: An anode for a galvanic cell is constructed from an anode material containing a main component, which releases lithium ions during a discharge process of the galvanic cell, and at least one additive. The at least one additive has an electrochemical potential which is higher with respect to elemental lithium than an electrochemical potential of the main component with respect to elemental lithium. The at least one additive has a charging capacity and a discharging capacity, and the charging capacity does not deviate from the discharging capacity by more than 10%.

Abstract: A solid electrolyte separator (10) for a lithium cell (100), especially for a lithium conversion cell, for example for a lithium-oxygen cell or for a lithium-sulfur cell. In order to simplify the assembly of the cell or battery and to extend its lifetime, the solid electrolyte separator (10) comprises a solid electrolyte base layer (11), which (11) is coated firstly with a first solid electrolyte coating (12) and secondly with a second solid electrolyte coating (13).

Abstract: A separator-cathode current collector element for a metal-oxygen cell, in particular for a lithium-oxygen cell, includes a porous cathode current collector and a separator coating disposed on one side of the current collector in order to improve performance and lifespan of the cell. A process for producing a separator-cathode current collector element includes coating one side of the porous cathode current collector with the separator material. A cell and a battery can be equipped with the separator-cathode current collector element.

Abstract: A battery cell includes a negative electrode and a positive electrode. The battery cell also contains a thermally expandable graphite intercalation compound.

Abstract: An electrochemical energy store (10), comprising a housing (12) for accommodating at least one cell unit (24), wherein the housing (12) forms a receptacle space for the arrangement of the cell unit (24), wherein a surface (17) of the housing (12) facing the receptacle space is completely covered by an electrically insulating material (27), wherein the housing (12) also comprises an opening (20) for filling a fluid electrolyte into the receptacle space, and wherein the opening (20) is covered by two overlapping end regions (26, 28) of the electrically insulating material (27). An energy store (10) according to the invention permits a simple means of bringing about sealed internal insulation of a housing (12) accompanied by simultaneously improved manufacturability.