Abstract
To address the issues of the shuttle effect of polysulfides and low sulfur utilization in lithium-sulfur (Li-S) batteries, we employed a one-step hydrothermal method followed by annealing to prepare Ni0.85Se/rGO nanocomposites. These nanocomposites act as a high-conductivity interlayer between the sulfur cathode and the separator. Ni0.85Se exhibits appropriate adsorption and catalytic effects for polysulfides. As a result, the Li-S battery demonstrates enhanced cycling stability and improved rate capability. The battery exhibits an initial specific capacity of 1058.5 mAh g−1 at 0.5 C, and a capacity of 413.7 mAh g−1 after 1000 cycles, only a 0.06 % decay per cycle.
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