Implanting nickel and cobalt phosphide into well-defined carbon nanocages: A synergistic adsorption-electrocatalysis separator mediator for durable high-power Li-S batteries

Reduced Graphene Oxide-Coated Zinc–Cobalt Oxide Nanosheet Arrays with N-Doped Carbon Anchored on Carbon Cloths as Cathode Materials for High-Sulfur-Loading Li–S Batteries

“…In addition, the Coulomb efficiency remained almost 100% during the high-load cycle, which meant that most of the LiPSs were successfully fixed to the cathode during the electrochemical reaction. Under high loading (8.2 mg cm –2 ), the rGO-S/ZnCo 2 O 4 @NC/CC cathode of Li–S batteries still has excellent specific capacity and cycle performance, which are higher than many previously reported cathodes and have been summarized in Figure d and Table S2. − …”

Nitrogen-doped porous carbon fiber/vertical graphene as an efficient polysulfide conversion catalyst for high-performance lithium–sulfur batteries

“…6b, the NF@VG electrode shows a higher redox current, which indicates the enhanced redox kinetics of polysulfide conversion. 51 Tafel plots show that the exchange current density for NF@VG (0.83 mA cm −2 ) is larger than that of NF (0.54 mA cm −2 ) and CF (0.43 mA cm −2 ) (Fig. 6c), which manifests that more polysulfides are converted to Li 2 S. 52 It can be seen from the EIS of the symmetrical cell (Fig.…”

A hierarchically porous TiO2@C membrane with oxygen vacancies: a novel platform for enhancing the catalytic conversion of polysulfides

“…Meanwhile, during positive scanning, two typical oxidation peaks are also observed, corresponding to the oxidation of Li 2 S/Li 2 S 2 to Li 2 S x and the further oxidation of Li 2 S x to S 8 . 37,38 Compared with the C membrane and TiO 2 @C membrane, the reduction peaks of the TiO 2−x @C membrane are at higher potentials and the oxidation peaks appear at lower potentials, illustrating that the reaction taking place at the TiO 2−x @C/S membrane has a smaller reaction overpotential, much more accelerated reaction kinetics, reduced polarization, and improved oxidation-reduction reversibility. The diffusion coefficients of Li + can be assessed according to the formula…”