Lithium alloy as an anode material and a preparation method thereof

A method for preparing a lithium alloy as an anode material, comprising the following steps:

• (1) heating a lithium metal to a temperature of 200° C.-800° C., wherein the temperature to which the lithium metal is heated is higher than a melting point of the lithium metal but lower than a melting point of a transition metal added in step (2), in an environment with a dew point not higher than −50° C. and an oxygen content not higher than 10 ppm to obtain a molten lithium metal;
• (2) adding the transition metal to the molten lithium metal at the temperature, maintaining the temperature for 5 minutes-15 minutes to make the transition metal dissolved to obtain a metal solution, and uniformly mixing the metal solution to form a molten alloy;
• wherein the transition metal is at least one selected from the group consisting of copper, nickel, scandium, titanium, vanadium, chromium, manganese, cobalt, and niobium, and wherein, an atomic ratio of the transition metal to the lithium metal is 1:100-2:3;
• and
• (3) cooling the molten alloy obtained in step (2) to room temperature to obtain the lithium alloy as the anode material, the lithium alloy containing transition metal nanowires forming a three-dimensional conductive network structure during said cooling,
• wherein the nanowires are uniformly dispersed inside the lithium alloy.