Flexible paper electrodes with ultra-high loading for lithium-sulfur batteries
With the rapid development of portable electronic devices, electric automobiles, and renewable energy storage, high-density energy storage systems are needed. Lithium-ion batteries, though mature and widely utilized, have encountered the theoretical limit and therefore can not meet the urgent need for high energy density. Lithium-sulfur batteries, owning a theoretical energy density of 2600 Wh kg-1, which are approximately 4 times as much as commercially used lithium-ion batteries, are considered to be strong candidates. The abundance and environmentally friendly nature of the element sulfur as cathode material are factors in the huge potential of lithium-sulfur batteries. The combination of nanocarbon and sulfur is effective at overcoming the insulating nature of sulfur for lithium sulfur batteries.