Matches in SemOpenAlex for { <https://semopenalex.org/work/W4386867014> ?p ?o ?g. }
Showing items 1 to 70 of
70
with 100 items per page.
- W4386867014 endingPage "918" @default.
- W4386867014 startingPage "918" @default.
- W4386867014 abstract "Room-temperature sodium - sulfur (RT Na-S) batteries are highly promising due to the favorable techno-economics and the greater availability of both sodium and sulfur. RT Na-S cells are held back by several primary challenges including dissolution of polysulfides species in liquid electrolytes, sluggish sulfur redox kinetics, as well as the large cathode volume expansion (170%) on cell discharge. Here, we develop a novel molybdenum carbide (MoC/Mo 2 C) electrocatalyst to promote Na-S reaction kinetics and extend batteries’ cycling lifetime. MoC/Mo 2 C nanoparticles is in-situ grown in conjunction with activation of nitrogen-doped hollow porous carbon nanotubes. Sulfur impregnation (50wt.% S) results in unique triphasic architecture termed MoC/Mo 2 C@PCNT-S. MoC/Mo 2 C electrocatalyst and carbon nanoporosity synergistically promote the sulfur utilization in carbonate electrolyte. In-situ time-resolved Raman, XPS and optical analysis demonstrate a quasi-solid-state phase transformation within MoC/Mo 2 C@PCNT-S, where minimal polysulfides are dissolved in electrolyte. As results, MoC/Mo 2 C@PCNT-S cathodes performed promising rate performance of 987 mAh g -1 at 1 A g -1 , 818 mAh g -1 at 3 A g -1 , and 621 mAh g -1 at 5 A g -1 . The cells delivered a retained capacity of 650 mAh g -1 after 1000 cycles at 1.5 A g -1 , which corresponds to only 0.028% capacity decay per cycle. Such promising cycling stability is also obtained for high mass loading cathodes (64wt.% S, 12.7 mg cm -2 ). Complementary Density Functional Theory (DFT) simulation provide fundamental insight regarding the electrocatalytic role of MoC/Mo 2 C nanoparticles. Favorable charge transfer between the sulfur and Mo sites on the surface of carbides contributes to a strong binding of Na 2 S x (1 ≤ x ≤ 4) on MoC/Mo 2 C surfaces. Consequently, the formation energy of Na 2 S x (1 ≤ x ≤ 4) on MoC/Mo 2 C is significantly lowered compared to the analogous redox in liquid, as well as the case of baseline ordered carbon." @default.
- W4386867014 created "2023-09-20" @default.
- W4386867014 creator A5047306146 @default.
- W4386867014 creator A5086743052 @default.
- W4386867014 date "2023-08-28" @default.
- W4386867014 modified "2023-09-27" @default.
- W4386867014 title "High‐Capacity and Stable Sodium‐Sulfur Battery Enabled by Novel Molybdenum Carbide Electrocatalyst and Carbon Nanoporosity" @default.
- W4386867014 doi "https://doi.org/10.1149/ma2023-015918mtgabs" @default.
- W4386867014 hasPublicationYear "2023" @default.
- W4386867014 type Work @default.
- W4386867014 citedByCount "0" @default.
- W4386867014 crossrefType "journal-article" @default.
- W4386867014 hasAuthorship W4386867014A5047306146 @default.
- W4386867014 hasAuthorship W4386867014A5086743052 @default.
- W4386867014 hasConcept C104779481 @default.
- W4386867014 hasConcept C127413603 @default.
- W4386867014 hasConcept C140205800 @default.
- W4386867014 hasConcept C147789679 @default.
- W4386867014 hasConcept C159985019 @default.
- W4386867014 hasConcept C17525397 @default.
- W4386867014 hasConcept C179104552 @default.
- W4386867014 hasConcept C185592680 @default.
- W4386867014 hasConcept C191897082 @default.
- W4386867014 hasConcept C192562407 @default.
- W4386867014 hasConcept C33989665 @default.
- W4386867014 hasConcept C42360764 @default.
- W4386867014 hasConcept C49110097 @default.
- W4386867014 hasConcept C518881349 @default.
- W4386867014 hasConcept C52859227 @default.
- W4386867014 hasConcept C5335593 @default.
- W4386867014 hasConcept C549387045 @default.
- W4386867014 hasConcept C68801617 @default.
- W4386867014 hasConceptScore W4386867014C104779481 @default.
- W4386867014 hasConceptScore W4386867014C127413603 @default.
- W4386867014 hasConceptScore W4386867014C140205800 @default.
- W4386867014 hasConceptScore W4386867014C147789679 @default.
- W4386867014 hasConceptScore W4386867014C159985019 @default.
- W4386867014 hasConceptScore W4386867014C17525397 @default.
- W4386867014 hasConceptScore W4386867014C179104552 @default.
- W4386867014 hasConceptScore W4386867014C185592680 @default.
- W4386867014 hasConceptScore W4386867014C191897082 @default.
- W4386867014 hasConceptScore W4386867014C192562407 @default.
- W4386867014 hasConceptScore W4386867014C33989665 @default.
- W4386867014 hasConceptScore W4386867014C42360764 @default.
- W4386867014 hasConceptScore W4386867014C49110097 @default.
- W4386867014 hasConceptScore W4386867014C518881349 @default.
- W4386867014 hasConceptScore W4386867014C52859227 @default.
- W4386867014 hasConceptScore W4386867014C5335593 @default.
- W4386867014 hasConceptScore W4386867014C549387045 @default.
- W4386867014 hasConceptScore W4386867014C68801617 @default.
- W4386867014 hasIssue "5" @default.
- W4386867014 hasLocation W43868670141 @default.
- W4386867014 hasOpenAccess W4386867014 @default.
- W4386867014 hasPrimaryLocation W43868670141 @default.
- W4386867014 hasRelatedWork W2282762318 @default.
- W4386867014 hasRelatedWork W2386698054 @default.
- W4386867014 hasRelatedWork W2468224813 @default.
- W4386867014 hasRelatedWork W2470886273 @default.
- W4386867014 hasRelatedWork W2606685686 @default.
- W4386867014 hasRelatedWork W2747791402 @default.
- W4386867014 hasRelatedWork W2805607335 @default.
- W4386867014 hasRelatedWork W2909008182 @default.
- W4386867014 hasRelatedWork W2922235645 @default.
- W4386867014 hasRelatedWork W4225006756 @default.
- W4386867014 hasVolume "MA2023-01" @default.
- W4386867014 isParatext "false" @default.
- W4386867014 isRetracted "false" @default.
- W4386867014 workType "article" @default.