Lithium battery liquid nitrogen discharge technology
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Initially, the batteries underwent discharge to 2.0 V at a current of 0.1C. Following this, they were immersed in a solution of 5 wt% NaCl (Sodium Chloride) measuring 2000 mL and were discharged for a span of 24 h. This process was sustained until the absence of gas bubbles in the solution indicated the achievement of complete battery discharge.