What Are The Advantages And Disadvantages Of Li-SOCl2 Battery

Advantages of Li/SOCl2 batteries:

1. The specific energy is very large: because it is both a solvent and a positive active material, its specific energy can generally reach 420Wh/Kg, and it can be up to 650Wh/Kg during low-rate discharge;

2. The voltage is very high: the open circuit voltage of the battery is 3.65V, and at 1mA/cm2, when discharging, the voltage can be maintained at 3.3V, and the voltage remains unchanged within 90% of the capacity range;

3. High specific power: the battery can be discharged at a current density of 10mA/cm2 or higher;

4. High voltage accuracy: the discharge curve is extremely flat when discharging at medium current density at room temperature;

5. Good high and low temperature performance: generally it can work normally within -40-50 ℃, even at -50-150 ℃; the capacity at -40 ℃ is about 50% of the normal temperature capacity;

6. Good storage performance: generally can be stored in wet for 5 years or more;

7. Fully sealed design;

8. The battery has no internal pressure: there is no internal pressure at the beginning, and a certain pressure does not appear until the end of the discharge.

Disadvantages of Li/SOCl2 batteries:

1. Voltage hysteresis: After long-term storage at room temperature or room temperature, when discharging with a larger current, the working voltage drops sharply, and then slowly returns to normal.

2. Safety issues: Although certain measures have been taken, it is still possible to store in a discharged state, and an uncontrollable heat eruption occurs during high temperature discharge and an explosion occurs

3, the price is more expensive

4. Environmental pollution: SOCl2 decomposes into hydrochloric acid and sulfur dioxide after absorbing water, which is extremely corrosive, so the production site must be well ventilated

Properties of SOCl2 (ThionylChloride):

SOCl2 is a liquid covalent inorganic compound that acts as both a positive electrode reactant and a solvent in the electrolyte solution in batteries. SOCl2 is a light yellow to red liquid with a density of 1.638, a boiling point of 78.8°C and a melting point of -105°C. It can be miscible with benzene, chloroform, carbon tetrachloride, etc., decomposed in water to form sulfurous acid and hydrochloric acid, and decomposed by heat to form sulfur dioxide, chlorine and sulfur monoxide, which can be formed by the action of sulfur dichloride and sulfur trioxide. , is liquid at room temperature.