Why can sodium-ion batteries be used in low-temperature environments?

The reason why sodium-ion batteries can be used in low-temperature environments is mainly based on the following reasons:

1. Unique electrolyte and electrode materials:

The electrolyte of sodium-ion batteries can maintain high ionic conductivity at low temperatures. This is because the electrolyte of sodium-ion batteries contains a higher concentration of salts, which can inhibit the freezing of the electrolyte, thus ensuring the high-efficiency output of the battery at low temperatures.

The electrode materials of sodium-ion batteries also have high low-temperature properties and can react quickly and release energy. This characteristic allows sodium-ion batteries to quickly start electrical equipment in extremely cold environments and provide users with stable power supply.

2. Low temperature performance parameters:

Sodium-ion batteries have a discharge capacity retention rate of more than 90% in a low temperature environment of -20°C, which is much higher than the 70% specified in GB/T 31486.

At low temperatures of -40°C, sodium-ion batteries can discharge more than 70% of their capacity, showing excellent low-temperature discharge performance.

Optimization measures:

The low-temperature performance of sodium-ion batteries can be further improved by optimizing the electrolyte formula and electrode structure. For example, adding a certain amount of additives and mixtures to improve the low-temperature performance of the electrolyte, and changing the pore structure and particle size distribution of the electrode to improve the low-temperature performance of the battery.

3. Security and stability:

Sodium-ion batteries did not catch fire or explode after undergoing tests such as short circuit, acupuncture, and extrusion, showing high safety. This characteristic makes the application of sodium-ion batteries in low-temperature environments safer and more reliable.

In summary, the low-temperature performance of sodium-ion batteries benefits from its unique electrolyte and electrode materials, excellent low-temperature performance parameters, and optimized battery structure. These characteristics enable sodium-ion batteries to maintain high working efficiency and stability in low-temperature environments, so they can be widely used in aerospace, seabed, scientific exploration in high-latitude areas and other fields.

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