Lithium-silicon alloy powder based on regulation and control of thermal trigger reaction direction and electrode preparation method

The invention relates to a lithium-silicon alloy powder and electrode preparation method based on regulation and control of a thermal trigger reaction direction, which comprises the following steps: 1) placing a lithium source on the edge of tiled silicon powder on a hot plate to ensure physical contact; (2) regulating and controlling the temperature distribution of a reaction field by limiting the tiling thickness of the silicon powder so as to limit the spontaneous reaction direction of the thermal-triggered lithium silicon, and synthesizing Li4.1 Si; and 3) DOL is used as a solvent, PEO is used as a binder, SP and the like are used as a conductive agent, and an electrode containing Li4.1 Si is prepared. The hot plate method is suitable for nano-scale to micron-scale silicon powder, the lithium-silicon chain reaction can be triggered at the temperature of 180 DEG C or above, and the preparation scale can be enlarged along with the enlargement of the size of the hot plate. And after the reaction is completed