Authors
Deqiang Lv, Chulong Liu, Zhaoxin Deng, Daoping Cai, Qidi Chen, Chaoqi Zhang, Yinggan Zhang, Hongbing Zhan
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e75909. Sep 23, 2026. Epub Sep 23, 2026.
Abstract
The pursuit of high-efficiency electrocatalysts that are capable of accelerating the sluggish redox reaction kinetics of lithium polysulfides (LiPSs) still remains a grand challenge in lithium-sulfur (Li─S) batteries. Herein, a novel electrocatalyst with ultrasmall antimony nanoclusters (Sb NCs) anchored on tungsten nitride (W5N4) support (denoted as Sb NCs/W5N4) with strong metal-support interaction is elaborately designed. Experimental results and theoretical calculations reveal that the Sb NCs/W5N4 electrocatalyst showcases strong chemical adsorption capability and excellent catalytic activity toward LiPSs. Benefiting from the multiple advantages, the Sb NCs/W5N4 modified separators can efficiently accelerate the LiPS conversion, suppress the shuttle effect, facilitate the lithium ion transportation, and prevent lithium dendrite growth. Impressively, significantly improved Li─S battery performances are achieved, including high specific discharge capacity (1439.4 mAh g-1 at 0.1 C), remarkable rate capability (763.1 mAh g-1 at 5 C), and stable long-term cycling stability (0.058% capacity decay per cycle at 1 C over 500 cycles). Furthermore, a satisfactory areal capacity of 4.75 mAh cm-2 is obtained at high sulfur loading (6.1 mg cm‒2) and lean electrolyte (8.2 µL mg-1). This work presents an important perspective for the rational development of high-efficiency electrocatalysts toward robust Li─S batteries and other catalysis applications.
PMID:
42776152
Bibliographic data and abstract were imported from PubMed on 23 Sep 2026.
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