![]() ![]() The more dissociated the lithium salt in the electrolyte, the higher the number of migrations and the higher the conductivity. The electrolyte with high conductivity transmits ions quickly and can exert more capacity at low temperature. The low temperature performance of the electrolyte is closely related to the size of the conductivity of the electrolyte itself. The problems faced by the battery at low temperature are: the viscosity of the electrolyte will increase, the ion conduction speed will become slower, resulting in the mismatch of the electron migration speed of the external circuit, so the battery will be severely polarized, and the charge and discharge capacity will decrease sharply.Įspecially when charging at low temperature, lithium ions easily form lithium dendrites on the surface of the negative electrode, resulting in battery failure. The electrolyte has the greatest impact on the low temperature performance of lithium batteries, and the composition and physicochemical properties of the electrolyte have an important impact on the low temperature performance of the battery. In terms of its influencing factors and reasons, it is actually its electrolyte. Therefore, it is of great significance to improve the low-temperature properties of lithium batteries. However, in aerospace, military and other fields, the battery is required to work normally at a temperature of -40☌ or lower. The operating temperature of traditional lithium-ion batteries is between -20 and +55 ☌. However, in a low temperature environment, the use of lithium batteries has problems such as low capacity, serious attenuation, and poor cycle rate performance.Īccording to reports, the discharge capacity of lithium-ion batteries at -20☌ is only about 31.5% of that at room temperature. The reason is that the lithium battery has the characteristics of large capacity, small size, and no pollution to the environment. Lithium batteries have been widely used since they entered the market.
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