Single‐Atom‐Regulated Heterostructure of Binary Nanosheets to Enable Dendrite‐Free and Kinetics‐Enhanced Li–S Batteries

Abstract

can suppress the polysulfide shuttling and exhibit excellent redox electrocatalytic properties for lithium polysulfides decomposition. The batteries with heterostructure-modified separators show a high initial discharge capacity of 1068.4 mAh g −1 at 0.5 C, excellent rate performances (719.6 mAh g −1 at 5C), and a remarkable cycling ability. Even with a high sulfur loading of 6.4 mg cm −2 , the pouch cell can deliver an areal capacity of 5.54 mAh cm −2 at 0.2 C. This work not only provides a new route for preparing SA-catalysts, but also sheds new lights into engineering electronic structures of heterointerfaces for developing high-performance Li-S batteries.

Rationally designing a Ti3C2Tx/CNTs-Co9S8 heterostructure as a sulfur host with multi-functionality for high-performance lithium–sulfur batteries

“…Then, the peak at 2.46 V reflects the oxidation of short-chain polysulfides to monomeric sulfur, which is in good agreement with the CV results reported in the literature. 51 In the following 2nd and 3rd CV curves, the reduction and oxidation peaks almost remain unchanged, indicating the good structural stability of the Ti 3 C 2 T x /CNTs-Co 9 S 8 /S heterostructure cathode. In Fig.…”

Coordination Manipulation of Single Atom Catalysts for Lithium‐Sulfur Batteries: Advances and Prospects

“…Such a support effect has received ever‐increasing attention by far in Li−S realm. Selecting suitable supporting candidates or modulating geometric configurations might change the coordination environment around the metal centers [92,93] . A morphological modification in graphene was proposed by Kim et al [94] .…”

Interfacial regulation of aqueous synthesized metal-semiconductor hetero-nanocrystals

“…The large lattice mismatches could lead to defects at the heterointerfaces and thus affect charge transport and utilization. Therefore, the construction of well-defined heterointerfaces is crucial for the overall application of heterostructures (Weng et al, 2014;Jang et al, 2017;Zhou et al, 2022). In the past decade, researchers have made great efforts to modulate the heterointerfaces and some low defect interfaces were fabricated by epitaxial growth with various morphologies (Bian et al, 2015;Fan et al, 2015;Jing et al, 2016;Xiong et al, 2017;Ding et al, 2022).…”