| 초록 |
Lithium-sulfur battery was not commercialized due to the shuttle phenomenon occurring at the cathode and the uncontrolled growth of lithium dendrite at the anode. Here, an initiated chemical vapor deposition technique (iCVD) was first introduced in a lithium-sulfur battery to homogeneously deposit polyvinylimidazole (pVIDZ) nanolayer on the separator. This pVIDZ polymer coating nanolayer has a thickness of 70-100 nm and weighs 0.055 mg cm-2. Besides, the pVIDZ coating layer plays an important role in stabilizing the cathode side while preventing the shuttle phenomenon and improving the cycle stability of the anode by inhibiting lithium dendrite growth. In conclusion, high sulfur loading electrodes of 4 mg cm-2, iCVD-derived bifunctional separator coating layer exhibits an initial discharge capacity of 881 mAh g-1 at a rate of 1.0C while maintaining 84.5% of its initial capacity after 300 cycles. |
