Researchers from the Korea Advanced Institute of Science and Technology (KAIST) have developed a way to use a seaweed derivative to improve the performance of lithium-sulfur batteries. The team, led by Professor Jaeyoung Lee, found that adding a small amount of alginate, a compound found in brown seaweed, to the sulfur cathode of a lithium-sulfur battery can significantly improve the battery's energy density and lifespan.

Lithium-sulfur batteries are a promising alternative to conventional lithium-ion batteries due to their high energy density and low cost. However, lithium-sulfur batteries have several drawbacks, including a short lifespan and poor performance at low temperatures.

The researchers found that the alginate binder helped to improve the adhesion between the sulfur cathode and the current collector, which reduced the resistance of the battery and improved its overall performance. The alginate binder also helped to suppress the growth of lithium dendrites, which are needle-like structures that can form on the lithium anode and cause the battery to short-circuit.

The researchers believe that their findings could pave the way for the development of more efficient and longer-lasting lithium-sulfur batteries.

Here are some of the key findings of the study:

- Adding a small amount of alginate to the sulfur cathode of a lithium-sulfur battery can significantly improve the battery's energy density and lifespan.

- The alginate binder helps to improve the adhesion between the sulfur cathode and the current collector, which reduces the resistance of the battery and improves its overall performance.

- The alginate binder also helps to suppress the growth of lithium dendrites, which are needle-like structures that can form on the lithium anode and cause the battery to short-circuit.

- The researchers believe that their findings could pave the way for the development of more efficient and longer-lasting lithium-sulfur batteries.