Construction of polypyrrole coated hollow cobalt manganate nanocages as an effective sulfur host for lithium-sulfur batteries

A strategy of using temporary space-holders to increase the capacity for Li S batteries

“…3 ) [64,65]. The MMMPC-rGO cathode exhibits the DLi + values of peak 1 and peak 2 were 2.24 × 10 -10 and 1.98 × 10 -12 cm 2 s -1 , respectively [25,66].…”

“…Based on the above considerations, graphene/sulfur composite comes into sight for cathode materials. The rGO with a mass of functional groups, such as hydroxyl groups, carbonyl groups, and carboxyl groups [22][23][24], generate strong chemical interaction with sulfur, rGO/S cathode can effectively fix the sulfur particles and polysulfide intermediates, limit the dissolution of polysulfides [25]. For instance, Zhou and co-workers designed a porous graphene framework via a vacuum filtration method, which employed for Li-S batteries delivered 728 mA h g -1 over 200 cycles at 0.335 A g -1 [26].…”

Sucrose derived microporous–mesoporous carbon for advanced lithium–sulfur batteries

“…Furthermore, the ID/IG value of PC/S (0.92) is higher than that of PC, which indicates that the PC/S composite generates more lattice defects after loading sulfur. In addition, the three small peaks at 153, 226 and 330 cm -1 are characteristic peaks of elemental sulfur [38], demonstrating the sulfur was compounded with PC successfully. The thermogravimetric analysis (TGA) was further performed to investigate the sulfur content in the PC/S composite.…”

A review on electronically conducting polymers for lithium-sulfur battery and lithium-selenium battery: Progress and prospects

“…The ZIF-67, as a popular MOF material, has a rhombohedral dodecahedron structure and Co ions, which are advantageous to adsorb lithium polysulfide. Lately, Gao et al [139] and Yang et al [140] selected the ZIF-67 to mix with KMnO 4 and thioacetamide, respectively, obtaining the hollow cobalt manganate (CoMn 2 O 4 ) and S, Co co-doped carbon nanocages (SCC) as the sulfur host, respectively. Based on the above experiment, pyrrole monomers were polymerized on the surface of CoMn 2 O 4 /S and SCC formed the coating layers, which improved the electron transfer of electrodes.…”