NEGATIVE LITHIUM-ION BATTERY ELECTRODE BASED ON SILICON-CARBON COMPOSITE FILM

摘要

The utility model (PM) relates to the field of high performance electrodes for lithium-ion batteries. A negative electrode of a lithium-ion battery based on a silicon-carbon composite film made in the form of a titanium foil with a composite film consisting of a multilayer structure containing alternating layers of silicon and carbon and a silicon-carbon interface, which is obtained by simultaneous or sequential magnetron sputtering of two corresponding targets. The thickness of the silicon and carbon layers varies from 10 to 150 nm, the silicon-carbon interface varies from 0.5 to 2.0 nm. The technical result of PM is to increase the specific capacitance of the negative electrode of a lithium-ion battery due to the presence of silicon layers in it while increasing the efficiency of the electrodes in charge-discharge processes due to carbon layers. When using the aforementioned technical solution, the increase in cyclability and stability is achieved due to the multilayer structure containing alternating layers of silicon and carbon and the silicon-carbon interface.