Amorphous transformation of FeP enabling enhanced sulfur catalysis and anchoring in High-performance Li-S batteries

Xia, Guang; Zhang, Lishu; Ye, Jiajia; Fu, Zhanghua; Li, Xuting; Yang, Xiaoxia; Zheng, Zhiqiang; Chen, Chuanzhong; Hu, Cheng

doi:10.1016/j.cej.2021.133705

Cited by 31 publications

(23 citation statements)

References 61 publications

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“…XPS was conducted on VOOH@CNTs before and after the absorption of Li 2 S 6 . The V 2p 1/2 and V 2p 3/2 peaks were found to shift to lower binding energies after the chemisorption of Li 2 S 6 (Figure b), indicating electron transfer from LiPSs to VOOH . Li–O and Li–O–H bonds were detected in the Li 1s spectrum of VOOH@CNTs after the absorption of Li 2 S 6 (Figure c), which can be ascribed to the interaction between VOOH and Li + in LiPSs via the Li–O bond .…”

Section: Resultsmentioning

confidence: 94%

“…The V 2p 1/2 and V 2p 3/2 peaks were found to shift to lower binding energies after the chemisorption of Li 2 S 6 (Figure 5b), indicating electron transfer from LiPSs to VOOH. 51 Li−O and Li−O−H bonds were detected in the Li 1s spectrum of VOOH@CNTs after the absorption of Li 2 S 6 (Figure 5c), which can be ascribed to the interaction between VOOH and Li + in LiPSs via the Li−O bond. 52 These two analyses suggest that VOOH can chemically anchor LiPSs via the V−S and Li− O bonds, thereby effectively suppressing the shuttle effect and improving cycling performance.…”

Section: Electrochemical Performancementioning

confidence: 93%

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Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Xiao

Sreekanth

et al. 2022

ACS Appl. Mater. Interfaces

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Lithium−sulfur batteries (LSBs) have been considered promising candidates for next-generation energy storage devices owing to their high energy density, low price, and environment-friendly characteristics. However, their commercialization has been hindered by the "shuttle effect", which occurs during the charge/discharge cycles and leads to poor cycling performance and low coulombic efficiency. Here, we synthesized flowershaped hollow VOOH spheres on the carbon nanotube (CNT) network, which were used as the multifunctional sulfur host materials for the first time in LSBs. These VOOH spheres can chemically and physically confine polysulfides as well as catalyze their redox conversion; additionally, their hollow structure can effectively accommodate the volume change during cycling. Moreover, the CNTs among spheres can improve the conductivity of the host material and increase the number of active sites for interfacial reactions. Accordingly, when used as a cathode material, VOOH@CNTs/S composites exhibited a large specific discharge capacity of 1414.63 mAh/g at 0.1 C and excellent cycling stability. At a low current density of 0.5 C, VOOH@CNTs/S exhibited a capacity decay of 0.044% per cycle after 100 cycles. Importantly, at an ultrahigh current density of 5 C, a specific capacity as high as 455.09 mAh/g could be still be delivered after 1000 cycles, corresponding to a superior capacity retention of 90.46% and an ultralow capacity decay of 0.009% per cycle. These findings open up a new material for the practical application of LSBs with ultrafast charge/discharge property and long-lasting cyclic stability.

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Section: Resultsmentioning

confidence: 94%

Section: Electrochemical Performancementioning

confidence: 93%

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Xiao

Sreekanth

et al. 2022

ACS Appl. Mater. Interfaces

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“…In addition to CoO, amorphous FeP also displays stronger polysulfide management ability than the corresponding crystalline state. [143] Overall, crystal structure regulation and amorphization control have exhibited great potential in enhancing the intrinsic activity of catalysts for MSBs. Notably, amorphous structures usually display high catalytic activity due to their disordered surface atoms.…”

Section: Crystal Phase Modulationmentioning

confidence: 99%

“…[44] Metal phosphides, where the phosphors element exhibits high electronegativity, are also considered a promising PSRC to regulate polysulfide. [143,203] Furthermore, the convenient and low-cost synthetic process endows the metal phosphides with enormous potential as the cathode material applied in MSBs. [204] One of the first examples is synthesizing CoP nanoparticles with surface oxidation layers to enhance the interfacial polysulfide affinity.…”

Section: Metal Carbides Nitrides Borides and Phosphidesmentioning

confidence: 99%

Modulating Bond Interactions and Interface Microenvironments between Polysulfide and Catalysts toward Advanced Metal–Sulfur Batteries

Zhu

Zheng

Yan

et al. 2022

Adv Funct Materials

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Advanced metal-sulfur batteries (MSBs) are regarded as promising next-generation energy storage devices. Recently, engineering polysulfide redox catalysts (PSRCs) to stabilize and catalytically convert polysulfide intermediates is proposed as an effective strategy to address the grand challenge of "shuttle effects" in the cathode. Therefore, modulating the bond interactions and interface microenvironments and disclosing the structure-performance correlations between polysulfide and catalysts are essential to guide the future cathode design in MSBs. Herein, from a multidisciplinary view, the most recent process in the reaction principles, in situ characterizations, bond interaction modulation, and interface microenvironment optimization of polysulfide redox catalysts, is comprehensively summarized. Especially, unique insights are provided into the strategies for tailoring the bond interactions of PSRCs, such as heteroatom doping, vacancy engineering, heterostructure, coordination structure arrangements, and crystal phase modulation. Furthermore, the importance of interface microenvironments and substrate effects in different PSRCs are exposed, and a detailed comparison is given to unveil the critical parameters for their future developments. Finally, the critical design principles on electrode microenvironments for advanced MSBs are also proposed to stimulate the practically widespread utilization of PSRCs-equipped cathodes in MSBs. Overall, this review provides cutting-edge guidance for future developments in high-energy-density and long-life MSBs.

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“…Conductive carbon-based materials are first introduced because they can physically restrict the shuttle of polysulfides through van der Waals forces between themselves and polysulfides while also improving the conductivity of the materials. − However, the pure physical confinement cannot completely restrain the shuttle of LiPSs owing to weak polysulfide adsorption. Researchers have found that using the polar–polar interaction between transition metals and sulfur species to form chemical adsorption can better inhibit the shuttle of LiPSs. − Nevertheless, the adsorbed polysulfides on the cathode side are deposited spontaneously due to the slow oxidation–reduction reaction kinetics between sulfur species. Once its concentration reaches a specific value, it will migrate to the anode side resulting from the concentration gradient diffusion, aggravating the shuttle effect, and resulting in active material loss.…”

Section: Introductionmentioning

confidence: 99%

ZnFe₂O₄–Ni₅P₄ Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

Zhang

Luo

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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The practical progress of lithium−sulfur batteries is hindered by the serious shuttle effect and the slow oxidation− reduction kinetics of polysulfides. Herein, the ZnFe 2 O 4 −Ni 5 P 4 Mott−Schottky heterojunction material is prepared to address these issues. Benefitting from a self-generated built-in electric field, ZnFe 2 O 4 −Ni 5 P 4 as an efficient bidirectional catalysis regulates the charge distribution at the interface and accelerates electron transfer. Meanwhile, the synergy of the strong adsorption capacity derived from metal oxides and the outstanding catalytic performance that comes from metal phosphides strengthens the adsorption of polysulfides, reduces the energy barrier during the reaction, accelerates the conversion between sulfur species, and further accelerates the reaction kinetics. Hence, the cell with ZnFe 2 O 4 −Ni 5 P 4 / S harvests a high discharge capacity of 1132.4 mAh g −1 at 0.5C and displays a high Coulombic efficiency of 99.3% after 700 cycles. The ZnFe 2 O 4 −Ni 5 P 4 /S battery still maintains a capacity of 610.1 mAh g −1 with 84.4% capacity retention after 150 cycles at 0.1C under a high sulfur loading of 3.2 mg cm −2 . This work provides a favorable reference and advanced guidance for developing Mott− Schottky heterojunctions in lithium−sulfur batteries.

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Amorphous transformation of FeP enabling enhanced sulfur catalysis and anchoring in High-performance Li-S batteries

Cited by 31 publications

References 61 publications

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Modulating Bond Interactions and Interface Microenvironments between Polysulfide and Catalysts toward Advanced Metal–Sulfur Batteries

ZnFe₂O₄–Ni₅P₄ Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

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Amorphous transformation of FeP enabling enhanced sulfur catalysis and anchoring in High-performance Li-S batteries

Cited by 31 publications

References 61 publications

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Modulating Bond Interactions and Interface Microenvironments between Polysulfide and Catalysts toward Advanced Metal–Sulfur Batteries

ZnFe2O4–Ni5P4 Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries

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ZnFe₂O₄–Ni₅P₄ Mott–Schottky Heterojunctions to Promote Kinetics for Advanced Li–S Batteries