초록 ▼

The disclosure describes an anode made of a thin metallic foil in discharged condition which is converted into a dense metallic alloy of an alkali metal during the first charge. The disclosure also describes an electrochemical rechargeable battery in discharged condition. The latter comprises an ano

The disclosure describes an anode made of a thin metallic foil in discharged condition which is converted into a dense metallic alloy of an alkali metal during the first charge. The disclosure also describes an electrochemical rechargeable battery in discharged condition. The latter comprises an anode made of a thin metallic foil, such as aluminum, magnesium or tin, an electrolyte, for example a polymeric electrolyte, as well as a cathode based on an oxide, a sulfide or an halide, prepared in discharged condition and constituting a source of alkali metal preferably lithium. The cathode should be capable of freeing the alkali metal under a charge so that the latter is introduced into the metallic foil to form an alloy of the alkali metal and of at least a portion of the metal constituting the metallic sheet. To obtain the charged battery, it is merely sufficient to apply a charge during a certain period of time while the anode is being transformed into an alloy. Substantially improved properties during cycling.

대표청구항 ▼

Electrochemical rechargeable battery in discharged condition for use in preparing an all solid battery in which the anode is a dense alloy of an alkali metal which comprises an anode made of a metallic foil whose thickness varies between about 3mand 50ma solid polymeric electrolyte whose thickness i

Electrochemical rechargeable battery in discharged condition for use in preparing an all solid battery in which the anode is a dense alloy of an alkali metal which comprises an anode made of a metallic foil whose thickness varies between about 3mand 50ma solid polymeric electrolyte whose thickness is between about 35mand 150mas well as a cathode based on oxide sulfide or halide prepared in discharged state and constituting a source of alkali metal, said cathode having a thickness between about 25mand 100mand being capable of reversibly freeing at least a portion of the alkali metal under a recharge, so that the alkali metal is introduced in the metallic foil to give an alloy of the alkali metal and of at least part of the metal constituting the metallic foil.