Abstract
Sulfur with high theoretical specific capacity has been widely used in the secondary battery field. In this study, based on the principle of sulfur ion absorption/desorption, we proposed a new secondary sulfur ion battery (SFIB) for the first time through a novel and simple design method. Through the absorption of carbon black (cb), the battery has excellent working performance with a specific energy of up to 132 mAh gcb−1 when using zinc foil, and a capacity retention rate of about 70% (93 mAh gcb−1), reaching more than 1000 times and setting a new record in the electrochemical performance of sulfur-based batteries. The SFIB system has important theoretical significance in opening up a new path for metal-sulfur batteries.
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