Sodium-ion battery and power consumption device

A preparation method for a sodium-ion battery, comprising:

• providing a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, wherein the negative electrode sheet comprises a negative electrode active material, the negative electrode active material comprises a carbon material, a specific surface area of the carbon material is a in a unit of m2/g, the electrolyte comprises an electrolyte salt, an organic solvent, and an additive, the additive comprises a sodium salt additive and an organic additive, a mass percentage of the sodium salt additive in the electrolyte is e in a unit of %, and a mass percentage of the organic additive in the electrolyte is f in a unit of %;
• and
• a numerical ratio of e to a is controlled to satisfy:
• 0.01≤e/a≤3.5, and a numerical ratio of f to a is controlled to satisfy:
• 0.05≤f/a≤10;
• and
• assembling the positive electrode sheet, the negative electrode sheet, the separator, and the electrolyte to obtain a sodium-ion battery.

A power consumption device, wherein the power consumption device comprises:

• a housing,
• an electronic element, and
• a battery, the electronic element and the battery being accommodated in the housing, wherein the battery supplies power to the electronic element, and the battery comprises a sodium-ion battery, wherein the sodium-ion battery comprises a positive electrode, a negative electrode, an electrolyte, and a separator, wherein the negative electrode comprises a negative electrode active material, the negative electrode active material comprises a carbon material, a specific surface area of the carbon material is a in a unit of m2/g, the electrolyte comprises an electrolyte salt, an organic solvent, and an additive, the additive comprises a sodium salt additive and an organic additive, a mass percentage of the sodium salt additive in the electrolyte is e in a unit of %, a numerical ratio of e to a satisfies:
• 0.01≤e/a≤3.5, a mass percentage of the organic additive in the electrolyte is f in a unit of %, and a numerical ratio of f to a satisfies:
• 0.05≤f/a≤10.