“…Secondly, as the structure of the cathode material is critical to the cycle performance of rechargeable lithium batteries, 9,22,[52][53][54][55][56] the cycle performance of the Li/S-GO cell is significantly influenced by the accumulation of these lithium compounds on the cathode surface: (i) after cycling, the less porous structure of the cathode cannot accommodate the large volume change of S anymore, leading to the possible mechanical degradation of the cathode and the particles of disintegrated sulfur may be more vulnerable to dissolution in the electrolyte; (ii) these lithium compounds are electrical insulators. Thus, the deposition of such reaction products on the cathode surface can reduce the in-depth discharge of sulfur, leading to low utilization of sulfur especially at higher rates.…”