read the following txt and then generate ten questions and corresponding answers base on the major content "As lithium-ion batteries (LIBs) have been commercialized for electronic devices and electric vehicles, the limited theoretical capacity of conventional LIBs has motivated the explorations and developments of new-generation energy storage materials. Lithium-sulfur (Li-S) batteries have attracted increasing attention for the theoretical energy densities ranging up to a factor of five beyond LIBs[1], [2], [3], [4]. However, several intrinsic defects of the sulfur cathode have hampered the widespread applications of Li-S batteries, including the slow redox conversion process, insulation of the cathode, the high solubility of the intermediates in the ether-based electrolytes (shuttle effect), and large volumetric change of the sulfur, which leads to the low sulfur utilization and severe capacity loss during electrochemical operation.The slow conversion kinetics of sulfur, which is one of the most pressing problem for Li-S batteries, involves the liquid–liquid conversion reaction of the long-chain LiPSs (Li2S8-Li2S4) and the solid–solid conversion reaction of the short-chain LiPSs (Li2S4-Li2S)[5], where the latter process possesses a high reaction barrier and therefore results in the slow kinetic process of overall LiPSs conversion, large polarization potential and poor efficiency of the battery[6]. Thereby, suppressing the loss of the active sulfur and lowering the reaction barrier and polarization are crucial for enhancing the power density of the sulfur cathode. To accelerate the conversion of the short-chain polysulfide, NAME_1 doped the carbon nanosheets with Co and N, both the density functional theory and in situ NAME_2 spectra confirm that the Co-N-C site could facilitate the conversion efficiency of polysulfides on this host[5]. NAME_3 embedded the monodisperse molybdenum (Mo) nanoparticles onto nitrogen-doped graphene Mo@N-G. The obtained Mo@N-G has exhibited catalytic behaviors, leading to the excellent rate performance[7]. NAME_4 adopted the carbon-coated yttria hollow spheres (YHS) as the electrocatalyst for the polysulfides conversion, the YHS@S/S cathode shows a brilliant specific discharge capacity of 912.5 mAh g−1 at 0.5C and long-term cycling performance[8]. NAME_1 proposed to place nanorod-based catalytic interlayer between the cathode and separator, and the electrocatalytic Co9S8 nanorods within the interlayer greatly enhance the conversion of polysulfides, resulting in a better rate and cycling performan