Silicon carbon negative electrode material, negative electrode sheet, secondary battery, battery module, battery pack and power consumption apparatus

A method of preparing a silicon carbon negative electrode material, comprising:

• providing a silicon source and a carbon source;
• adding the silicon source and the carbon source into an additive solution, evenly mixing, and then removing a solvent to obtain a muddy mixture;
• heating the muddy mixture to obtain a silicon carbon negative electrode material intermediate;
• and
• heating the silicon carbon negative electrode material intermediate in an inert gas atmosphere to obtain the silicon carbon negative electrode material, wherein
• a battery composed of a negative electrode prepared by the silicon carbon negative electrode material as a working electrode, metal lithium as a counter electrode and an electrolyte containing a lithium ion conductive substance is charged and discharged, and in a case of drawing a relationship graph between a differential value dQ/dV obtained by differentiating a charging and discharging capacity Q by a working electrode potential V and the working electrode potential V, when energizing the negative electrode material in a direction of delithiation, a ratio of a maximum Y of dQ/dV between 400-480 mV to a maximum X of dQ/dV between 200-255 mV is in a range of 3.5 to 15.