The new battery can maintain a capacitance of 1200 mAh/g after 300 charge and discharge cycles at a temperature of 60 degrees Celsius, while the average capacitance of traditional lithium-ion batteries is 140 to 170 mAh/g. Because lithium-sulfur batteries carry half the voltage of lithium-ion batteries and have an average capacitance of 8 times that, the energy density of the new battery is about 4 times that of traditional lithium-ion batteries.

　　There are three main problems with sulfur batteries: lithium polysulfide compounds dissolve in the electrolyte; Sulfur, as a non-conductive substance, has very poor conductivity and is not conducive to the high rate performance of batteries; During the charging and discharging process, the volume of sulfur increases and decreases greatly, which may lead to battery damage.

　　However, all solid-state lithium-sulfur batteries eliminate the problem of sulfur dissolution, and due to the easy reaction between liquid electrolytes and lithium metals, the safety of new batteries using solid electrolytes is also higher. In addition, the sulfur used in the new lithium-sulfur battery is a byproduct left after processing petroleum, with abundant sources and low cost. It can also store more energy, which makes the new battery have advantages such as low cost and high energy density.

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