Promotional role of Li 4 Ti 5 O 12 as polysulfide adsorbent and fast Li + conductor on electrochemical performances of sulfur cathode

Immobilizing Polysulfide by In Situ Topochemical Oxidation Derivative TiC@Carbon‐Included TiO2 Core–Shell Sulfur Hosts for Advanced Lithium–Sulfur Batteries

“…The strong chemical affinity between the TiC@C‐TiO 2 composite and Li 2 S 6 can also be illustrated by the TiS bond at 161.8 eV. [ 58 ] The S 2p peaks at 162.9 and 164.0 eV can be related to the LiS bond and SS bond from Li 2 S 6 , [ 59 ] respectively. It should be noted that there are some characteristic peaks at 167.2 and 168.2 eV, matching the binding energies of thiosulfate and polythionate complex, [ 60 ] respectively.…”

An ultrathin and continuous Li4Ti5O12 coated carbon nanofiber interlayer for high rate lithium sulfur battery

“…For instance, a S/graphite/LTO multilayer hybrid Li-S battery was fabricated [43] . The adsorption effect of LTO was confirmed and the LTO can suppress the shuttle effect of polysulfide by chemical adsorption [41,44] . However, due to low electric conductivity of LTO, a carbon network is necessary when applying the LTO as the in-terlayer in the Li-S system.…”

“…However, their poor lithium ion conductivity limits mass loading of these sorbent. Li 4 Ti 5 O 12 (LTO) was studied extensively as an anode material for lithium ion batteries because of its high lithium ion conductivity and structural stability, which were also applied in Li-S system [40][41][42] . For instance, a S/graphite/LTO multilayer hybrid Li-S battery was fabricated [43] .…”

Tuning Sulfur Doping for Bifunctional Electrocatalyst with Selectivity between Oxygen and Hydrogen Evolution

“…However, at extremely high sulfur doping levels (such as S-2.4), excess sulfur leads to the formation of long-chain polythionate complexes, which block the active sites of the electrocatalyst surface and sharply lower the OER activity of Sdoped cobalt molybdate. 37 The reason for the change in the amount of Co 3+ remains to be further explored; however, it may be related to the partial formation of an oxide layer on the surface of the catalyst, as evident from the increasing percentage of Co−O bonding in Co 2p spectra Table S4). 15 As a matter of fact, recent references propose that the formed sulfide-oxide interface helps for better carrier transportation, thus enhancing the efficiency of OER.…”

“…These results imply that the higher oxidation state, Co 3+ , dominates the OER in our S-doped cobalt molybdate samples, while Co 2+ is relatively inactive. However, at extremely high sulfur doping levels (such as S-2.4), excess sulfur leads to the formation of long-chain polythionate complexes, which block the active sites of the electrocatalyst surface and sharply lower the OER activity of S-doped cobalt molybdate . The reason for the change in the amount of Co 3+ remains to be further explored; however, it may be related to the partial formation of an oxide layer on the surface of the catalyst, as evident from the increasing percentage of Co–O bonding in Co 2p spectra Table S4).…”