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Lithium–sulfur (Li–S) batteries have attracted considerable attention owing to their extremely high energy densities. However, the application of Li–S batteries has been limited by low sulfur utilization, poor cycle stability, and low rate capability. Accelerating the rapid transformation of polysulfides is an effective approach for addressing these obstacles. In this study, a defect‐rich single‐atom...
The slow sulfur oxidation–reduction kinetics are one of the key factors hindering the widespread use of lithium–sulfur batteries (LSBs). Herein, flower‐shaped NiS2‐WS2 heterojunction as the functional intercalation of LSBs is successfully prepared, and effectively improved the reaction kinetics of sulfur. Flower‐like nanospheres composed of ultra‐thin nanosheets (≤10 nm) enhance quickly transfer of...
Bidirectional Catalytic Conversion
A flower‐like nickel sulfide/tungsten sulfide heterojunction material are developed to promote the bidirectional catalytic conversion of polysulfides in lithium‐sulfur batteries. Specifically, in article number 2206926, Daying Guo, Xi'an Chen, and co‐workers adapt nickel sulfide to regulate the electronic structure of tungsten sulfide, causing the heterojunction...
Solid‐state lithium–sulfur batteries (SSLSBs) have attracted tremendous research interest due to their large theoretical energy density and high safety, which are highly important indicators for the development of next‐generation energy storage devices. Particularly, safety and “shuttle effect” issues originating from volatile and flammable liquid organic electrolytes can be fully mitigated by switching...
The construction of high sulfur (S) loading cathode is one of the critical parameters to obtain lithium–sulfur (Li–S) batteries with high energy density, but the slow redox reaction rate of high S loading cathode limits the development process. In this paper, a metal coordinated polymer‐based three‐dimensional network binder, which can improve the reaction rate and stability of S electrode. Compared...
All‐solid‐state lithium–sulfur (Li/S) batteries are promising next‐generation energy‐storage devices owing to their high capacities and long cycle lives. The Li2S active material used in the positive electrode has a high theoretical capacity; consequently, nanocomposites composed of Li2S, solid electrolytes, and conductive carbon can be used to fabricate high‐energy‐density batteries. Moreover, the...
Heterogeneous catalytic mediators have been proposed to play a vital role in enhancing the multiorder reaction and nucleation kinetics in multielectron sulfur electrochemistry. However, the predictive design of heterogeneous catalysts is still challenging, owing to the lack of in‐depth understanding of interfacial electronic states and electron transfer on cascade reaction in Li–S batteries. Here,...
Lithium–sulfur (Li–S) batteries are widely studied because of their high theoretical specific capacity and environmental friendliness. However, the further development of Li–S batteries is hindered by the shuttle effect of lithium polysulfides (LiPSs) and the sluggish redox kinetics. Since the adsorption and catalytic conversion of LiPSs mainly occur on the surface of the electrocatalyst, regulating...
Structurally optimized transition metal phosphides are identified as a promising avenue for the commercialization of lithium–sulfur (Li–S) batteries. In this study, a CoP nanoparticle‐doped hollow ordered mesoporous carbon sphere (CoP‐OMCS) is developed as a S host with a “Confinement–Adsorption–Catalysis” triple effect for Li–S batteries. The Li‐S batteries with CoP‐OMCS/S cathode demonstrate excellent...
Single‐atom catalysts are proven to be an effective strategy for suppressing shuttle effect at the source by accelerating the redox kinetics of intermediate polysulfides in lithium–sulfur (Li–S) batteries. However, only a few 3d transition metal single‐atom catalysts (Ti, Fe, Co, Ni) are currently applied for sulfur reduction/oxidation reactions (SRR/SOR), which remains challenging for screening new...
The compact sulfur cathodes with high sulfur content and high sulfur loading are crucial to promise high energy density of lithium–sulfur (Li–S) batteries. However, some daunting problems, such as low sulfur utilization efficiency, serious polysulfides shuttling, and poor rate performance, are usually accompanied during practical deployment. The sulfur hosts play key roles. Herein, the carbon‐free...
The charge process of lithium–sulfur batteries (LSBs) is a process in which molecular polarity decreases and the volume shrinks gradually, which is the process most likely to cause lithium polysulfides (LiPSs) loss and interfacial collapse. In this work, GeS2 is utilized, whose (111) lattice plane exactly matches with the (113) lattice of α‐S8, to solve these problems. GeS2 can regulate the interconversion‐deposition...
As an attractive high‐energy‐density technology, the practical application of lithium–sulfur (Li–S) batteries is severely limited by the notorious dissolution and shuttle effect of lithium polysulfides (LiPS), resulting in sluggish reaction kinetics and uncontrollable dendritic Li growth. Herein, a p‐n typed heterostructure consisting of n‐type MoS2 nanoflowers embedded with p‐type NiO nanoparticles...
Lithium–sulfur (Li–S) batteries hold great promise for widespread application on account of their high theoretical energy density (2600 Wh kg−1) and the advantages of sulfur. Practical use, however, is impeded by the shuttle effect of polysulfides along with sluggish cathode kinetics. it is reported that such deleterious issues can be overcome by using a composite film (denoted as V‐CMP@MWNT) that...
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