Chitosan grafted Graphene Oxide Binder for High Performance Lithium-Sulfur Batteries
발표자
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초록
내용
The lithium-sulfur battery is a great promising candidate for next generation batteries. However, insulated sulfur and the dissolution of soluble lithium polysulfide(LPS) interrupt practical application. To address this issue, the chitosan grafted graphene oxide (chitosan-g-GO) was prepared as a binder in order to improve the electrical conductivity of sulfur and suppress the dissolution of LPS into the electrolyte. The chitosan-g-GO binder with optimized composition showed enhanced initial discharge capacity, 1342 mAhg-1 at 0.05 C and the reversible specific capacity after 200 cycles was 780 mAhg-1 at 1 C. These are attributed to synergistic effect between chitosan and GO. This work offers a simple and effective ways for improving the capacitive performance of Li-S batteries for practical applications.