Patent ID: 8389138

Claim:
Operating method of a lithium-ion microbattery comprising: a positive electrode having a first storage capacity of lithium ions and a first thickness made from a first lithium insertion material, an electrolyte, and a negative electrode having a second storage capacity of lithium ions and a second thickness made from a second lithium insertion material different from the first material, the first and second thicknesses being chosen such that the ratio of the first storage capacity over the second storage capacity is greater than or equal to 10 and lower than or equal to 1000, the method comprising the following steps: a first charge of the microbattery to transfer, from the positive electrode to the negative electrode, a first quantity of lithium until saturation of the negative electrode is reached and a second quantity of lithium until a metallic lithium layer is formed between the electrolyte and the lithium-saturated negative electrode, subsequent discharges and charges by transfer between the positive electrode and the negative electrode only of the second quantity of lithium deposited in the form of the metallic lithium layer.