ИСТИНА

It is well known that metallic silicon forms an alloy with lithium, in which the lithium content can reach up to 4.4 lithium atoms per silicon atom. If silicon is used as the anode of lithium batteries, this composition corresponds to a very high power (about 4000 mAh/g [1]), which is more than an order of magnitude higher than the capacities of currently used anodes based on carbon materials [2]. However, the use of silicon as an anode is hindered by the poor reversibility of this process. The fact is that the process of charging and discharging silicon with lithium is accompanied by grinding of the silicon anode and loss of contact between the current collector and the resulting silicon powder.One of the well-known techniques that avoids damage to the silicon anode during cycling is the use of composite materials consisting of nanosized silicon particles placed in a conductive matrix, for example, a carbon material [3].In this paper, we describe a method for obtaining nanosized silicon. The composition and some properties of the resulting nanosized silicon powder are also described.