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Abstract

Disclosed is a lithium-ion battery, where ethylene sulfate, fluoroethylene carbonate, and a carboxylate ester organic solvent are introduced into a non-aqueous electrolyte solution, and a relationship between a negative electrode binder content X in a negative electrode plate and a DTD content A, an FEC content B, and a carboxylate ester organic solvent content Yin the non-aqueous electrolyte solution is further adjusted to meet: 10≤A+B≤21, 0.02≤X/(A+B+Y)≤0.2, and 0.02≤X/Y≤0.25, and a conductivity of an electrolyte solution at a low temperature and a migration rate of lithium ions may be improved, so that a negative surface may form a stable and low-impedance SEI interface, thereby improving low-temperature charging performance and high-rate discharging performance of a battery. Moreover, a cycling expansion rate of the lithium-ion battery may be reduced.

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