Cation-doped ZnS catalysts for polysulfide conversion in lithium–sulfur batteries

Single-Atom Yttrium Engineering Janus Electrode for Rechargeable Na–S Batteries

“…Moreover, the strong surface affinity between the polysulfides and various substrates was also considered. The binding energy between Na 2 S 6 as a representative Na polysulfide and YN 4 /C was calculated to be −2.30 eV (Figures b and S2), which was remarkably stronger than those of other cases, such as Na 2 S 6 , providing a potentially positive impact on sulfur reduction reactions and polysulfide shuttling. , This demonstrated that the introduction of the YN 4 moiety into carbon can greatly enhance the interaction with Na polysulfides, indicating that the introduction of the YN 4 moiety can greatly improve the adsorption of Na + in carbon, which was further confirmed by the adsorption energy of NC and various SAs for Na + (Figures S3 and S4). On the other hand, to better understand the role of YN 4 /C in Na growth behavior, first-principal-based high-dimensional neural network potentials (HDNNPs) were conducted to run the molecular dynamics (MD) of the Na dendrite growth on both surfaces.…”

Atomically distributed asymmetrical five-coordinated Co–N5 moieties on N-rich doped C enabling enhanced redox kinetics for advanced Li–S batteries

“…Although lithium-sulfur (Li-S) batteries have attracted intensive attention owing to their ultrahigh theoretical energy density of 2600 W h kg −1 or 2800 W h L −1 , the industrial applications of Li-S batteries still face tough challenges. [1][2][3] On one hand, the insulating nature of sulfur and its reduced products (Li 2 S 2 /Li 2 S) lead to severe polarization and sluggish electron/ion transmission; 2,3 on the other hand, soluble lithium polysuldes (LiPSs, Li 2 S x , 4 # x # 8) are prone to have a "shuttle effect", resulting in rapid capacity fading and serious shortening of the cycle life of Li-S batteries. 2,4 To alleviate the LiPS shuttle effect and enhance their utilization, considerable efforts were focused on physical connement and chemical binding strategies for entrapping the LiPSs.…”

A dual-functional interlayer for Li–S batteries using carbon fiber film cladded electron-deficient Li2B4O7

“…6 To date, researchers have come up with many effective methods to solve these problems by employing carbon materials to enhance the conductivity and store sulfur as host materials, 7,8 adding the catalytic materials (metal oxides/ suldes, MOF, etc.) to promote the reaction kinetics, [9][10][11] optimizing the composition of the electrolyte to increase the stability of polysuldes, 12,13 and functionalizing the separator to inhibit the mobility of the polysuldes 8,14 as well as interlayers. [15][16][17] Recent works found that the interlayer could suppress the shuttle effect of polysuldes by physical, chemical, or physicochemical inhibition, displaying the noteworthy advantages as follows: 18,19 rst of all, the high conductivity derived from the addition of carbon materials (e.g., micro/ mesoporous carbon, CNTs, graphene, and porous biomaterials [20][21][22] ) allows sulfur to fully react and deliver high specic capacity; secondly, the chemical adsorption and catalytic effect from the functional materials effectively decreases the mobility of polysuldes, enhances the reaction kinetics, and allows the batteries to display high capacity and stable cycling; thirdly, the interlayer could simplify the cathode preparation process by avoiding further thermal energy consumption.…”

“…To date, researchers have come up with many effective methods to solve these problems by employing carbon materials to enhance the conductivity and store sulfur as host materials, 7,8 adding the catalytic materials (metal oxides/sulfides, MOF, etc. ) to promote the reaction kinetics, 9–11 optimizing the composition of the electrolyte to increase the stability of polysulfides, 12,13 and functionalizing the separator to inhibit the mobility of the polysulfides 8,14 as well as interlayers. 15–17 Recent works found that the interlayer could suppress the shuttle effect of polysulfides by physical, chemical, or physicochemical inhibition, displaying the noteworthy advantages as follows: 18,19 first of all, the high conductivity derived from the addition of carbon materials ( e.g.…”