Nanoconfining ultrafine heterostructured sulfides in carbon nanofibers enabling ultrastable and fast sodium storage

Gao, Zongying; Zhu, Chunliu; Yang, Lei; Liang, Huanyu; Tian, Weiqian; Shi, Jing; Wu, Jingyi; Chen, Jingwei; Huang, Minghua; Wang, Huanlei

doi:10.1016/j.cej.2023.144698

Cited by 14 publications

(7 citation statements)

References 110 publications

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“…In Figure e, the comprehensive survey scan spectrum indicates the existence of Sn, S, N, C, and O elements. Figure f displays two discernible peaks at 495.3 and 486.8 eV for high-resolution Sn 3d spectrum, which correspond to Sn 3d 3/2 and Sn 3d 5/2 of Sn 2+ in SnS, thereby affirming the successful creation of the SnS phase. , Two peaks at 165.2 and 163.9 eV of S 2p spectrum correspond to S 2p 1/2 and S 2p 3/2 of S 2– , and one at 168.2 eV indicative of sulfuric species of containing C–SO x (Figure g). , Three peaks of C 1s spectrum (Figure h) correspond to O–CO (288.8 eV), C–C (284.8 eV), and C–N (286.3 eV). − Figure i displays two discernible peaks at 398.3 and 400.5 eV for N 1s spectrum, which correspond to Pyridine N and pyrrole N, which derived from the pyrolysis of PDA, improving the electrochemical performance of the SNC composite. , …”

Section: Results and Discussionmentioning

confidence: 87%

Flexible Self-Supporting MOF-Based Bean Pod Cube Hollow Nanofibers for Ultralong Cycling and High Rate Na Storage

Wu,

Long,

Dai

et al. 2024

ACS Appl. Mater. Interfaces

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Sodium-ion batteries (SIBs) have garnered significant attention due to their potential as an emerging energy storage solution. Tin sulfide (SnS) has emerged as a promising anode material for SIBs due to its impressive theoretical specific capacity of 1022 mA h g −1 and excellent electrical conductivity. However, its practical application has been hindered by issues such as large volume expansion, which adversely affects cycling stability and rate performance during the charge/discharge processes. In this study, a novel approach to address these issues by synthesizing the bean pod cube hollow metal−organic framework (MOF)-SnS x /NC@Ndoped carbon nanofibers through a process involving electrospinning, PDA coating, and calcination. The Sn-MOF serves as a selfsacrificing template, facilitating the simultaneous dissociation of MOF and polymerization of dopamine, leading to the creation of hollow intermediates that retain tin components. Subsequent sulfidation results in the integration of the hollow MOF-SnS x /NC nanoparticles within 3D nitrogen-doped carbon nanofibers, forming the distinctive bean pod cube composite structure. This unique configuration effectively shortens the diffusion path and mitigates volume expansion for sodium ions, ultimately yielding an exceptional high rate performance of 130 mA h g −1 (10 A g −1 ) and an ultralong cycling performance of 328 mA h g −1 even after 3500 cycles (2 A g −1 ) as the anode for SIBs.

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Section: Results and Discussionmentioning

confidence: 87%

Flexible Self-Supporting MOF-Based Bean Pod Cube Hollow Nanofibers for Ultralong Cycling and High Rate Na Storage

Wu,

Long,

Dai

et al. 2024

ACS Appl. Mater. Interfaces

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“…Figure A shows the full spectrum of the H-CoS 2 /FeS 2 @CNFs-2 hybrid composite, indicating the presence of Co, Fe, S, C, N, and O elements in the composite, consistent with the result of the EDS spectrum. A distinct oxygen signal can be clearly observed, which is most likely due to the partial oxidation of surface metal sulfides. , The high-resolution spectrum of Co 2p, as shown in Figure B, reveals that two spin–orbit doublet peaks at 793.5/778.8 and 797.1/782.0 eV are associated with Co 3+ 2p 1/2 /Co 3+ 2p 3/2 and Co 2+ 2p 1/2 /Co 2+ 2p 3/2 , respectively. , Additionally, two shakeup satellites at 786.1 and 802.9 eV are also identified. From the high-resolution Fe 2p spectrum as shown in Figure C, two pairs of characteristic peaks located at 720.2/707.4 and 723.9/710.9 eV are assigned to Fe 2+ 2p 1/2 /Fe 2+ 2p 3/2 and Fe 3+ 2p 1/2 /Fe 3+ 2p 3/2 , respectively .…”

Section: Resultsmentioning

confidence: 96%

“…A distinct oxygen signal can be clearly observed, which is most likely due to the partial oxidation of surface metal sulfides. 33,51 The highresolution spectrum of Co 2p, as shown in Figure 3B, reveals that two spin−orbit doublet peaks at 793.5/778.8 and 797.1/ 782.0 eV are associated with Co 3+ 2p 1/2 /Co 3+ 2p 3/2 and Co 2+ 2p 1/2 /Co 2+ 2p 3/2 , respectively. 52,53 Additionally, two shakeup satellites at 786.1 and 802.9 eV are also identified.…”

Section: Resultsmentioning

confidence: 99%

“…The high surface capacitive contribution of H-CoS 2 /FeS 2 @CNFs-2 is mainly due to the coupling effect of heterogeneous interfaces combined with the high specific surface area as well as porous structure, providing a large number of active sites and enhancing the Na + insertion/extraction capability, which is conducive to the high rate and long cycle life of sodium storage. 51,71,72 Moreover, EIS was also employed to analyze the charge transfer kinetics of the electrodes at a frequency range from 0.01 to 10 5 Hz. Figure 5E where R and T are the gas constant and absolute temperature, respectively, S is the area of the electrode, n is the number of electrons transferred in the reaction, F is the Faraday constant, and C and σ represent the Na + concentration and Warburg factor, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…As the scan rate increases from 0.2 to 1.0 mV s –1 (Figure D and Figure S13), the corresponding contributions of the capacitive effect become more and more prominent, accounting for 87.9%, 91.3%, 94.6%, 96.0%, and 97.0% of the total capacity, respectively, which are higher than values of H-CoS 2 /FeS 2 @CNFs-1 (81.9%, 86.6%, 89.2%, 93.0%, and 95.6%) and H-CoS 2 /FeS 2 @CNFs-4 (77.1%, 84.9%, 88.8%, 92.0%, and 94.3%). The high surface capacitive contribution of H-CoS 2 /FeS 2 @CNFs-2 is mainly due to the coupling effect of heterogeneous interfaces combined with the high specific surface area as well as porous structure, providing a large number of active sites and enhancing the Na + insertion/extraction capability, which is conducive to the high rate and long cycle life of sodium storage. ,, …”

Section: Resultsmentioning

confidence: 99%

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Prussian Blue Analogue Derived CoS₂/FeS₂ Confined in N, S Dual-Doped Carbon Nanofibers for Sodium Storage

Ren,

Tang,

Song

et al. 2023

ACS Appl. Nano Mater.

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Pyrite iron disulfide (FeS 2 ) has aroused wide attention owing to its high theoretical capacity, making it a promising anode material for sodium-ion batteries (SIBs). Unfortunately, the poor electrical conductivity, large volume variation, and sluggish ion-migration kinetics lead to inferior rate capability and cycle stability, thus limiting its practical application. Herein, utilizing Prussian blue analogues (PBAs) as precursors, hollow heterostructured CoS 2 /FeS 2 nanoparticles confined in N, S dual-doped carbon nanofibers (denoted as H-CoS 2 /FeS 2 @CNFs) are successfully developed via facile electrospinning, carbonization, and gas sulfurization processes. The effective combination of a unique hollow heterostructure and highly conductive N, S dual-doped CNFs can accelerate electron transport and ion diffusion kinetics, avoid aggregation of active materials, and obtain enhanced structural stability. As expected, the optimal H-CoS 2 /FeS 2 @CNFs-2 hybrid composite delivers a high reversible capacity of 542.6 mA h g −1 after 150 cycles at 0.5 A g −1 and outstanding cycling stability with a capacity of 323.7 mA h g −1 over 1500 cycles at 5.0 A g −1 , showing the excellent sodium storage capability for SIBs. The rational design offers inspiration for fabricating high-performance bimetallic sulfides as anodes of SIBs through spatial confinement and a heterogeneous interface engineering strategy.

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ZnSe/SnSe Heterostructure Incorporated with Selenium/Nitrogen Co‐Doped Carbon Nanofiber Skeleton for Sodium‐Ion Batteries

Zhang,

Cheng,

et al. 2024

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Effective strategies toward building exquisite nanostructures with enhanced structural integrity and improved reaction kinetics will carry forward the practical application of alloy‐based materials as anodes in batteries. Herein, a free‐standing 3D carbon nanofiber (CNF) skeleton incorporated with heterostructured binary metal selenides (ZnSe/SnSe) nanoboxes is developed for Na‐ion storage anodes, which can facilitate Na+ ion migration, improve structure integrity, and enhance the electrochemical reaction kinetics. During the carbonization and selenization process, selenium/nitrogen (Se/N) is co‐doped into the 3D CNF skeleton, which can improve the conductivity and wettability of the CNF matrices. More importantly, the ZnSe/SnSe heterostructures and the Se/N co‐doping CNFs can have a synergistic interfacial coupling effect and built‐in electric field in the heterogeneous interfaces of ZnSe/SnSe hetero‐boundaries as well as the interfaces between the CNF matrix and the selenide heterostructures, which can enable fast ion/electron transport and accelerate surface/internal reaction kinetics for Na‐ion storage. The ZnSe/SnSe@Se,N‐CNFs exhibit superior Na‐ion storage performance than the comparative ZnSe/SnSe, ZnSe and SnSe powders, which deliver an excellent rate performance (882.0, 773.6, 695.7, 634.2, and 559.0 mAh g−1 at current rates of 0.1, 0.2, 0.5, 1, and 2 A g−1) and long‐life cycling stability of 587.5 mAh g−1 for 3500 cycles at 2 A g−1.

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Nanoconfining ultrafine heterostructured sulfides in carbon nanofibers enabling ultrastable and fast sodium storage

Cited by 14 publications

References 110 publications

Flexible Self-Supporting MOF-Based Bean Pod Cube Hollow Nanofibers for Ultralong Cycling and High Rate Na Storage

Flexible Self-Supporting MOF-Based Bean Pod Cube Hollow Nanofibers for Ultralong Cycling and High Rate Na Storage

Prussian Blue Analogue Derived CoS₂/FeS₂ Confined in N, S Dual-Doped Carbon Nanofibers for Sodium Storage

ZnSe/SnSe Heterostructure Incorporated with Selenium/Nitrogen Co‐Doped Carbon Nanofiber Skeleton for Sodium‐Ion Batteries

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Nanoconfining ultrafine heterostructured sulfides in carbon nanofibers enabling ultrastable and fast sodium storage

Cited by 14 publications

References 110 publications

Flexible Self-Supporting MOF-Based Bean Pod Cube Hollow Nanofibers for Ultralong Cycling and High Rate Na Storage

Flexible Self-Supporting MOF-Based Bean Pod Cube Hollow Nanofibers for Ultralong Cycling and High Rate Na Storage

Prussian Blue Analogue Derived CoS2/FeS2 Confined in N, S Dual-Doped Carbon Nanofibers for Sodium Storage

ZnSe/SnSe Heterostructure Incorporated with Selenium/Nitrogen Co‐Doped Carbon Nanofiber Skeleton for Sodium‐Ion Batteries

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Product

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Prussian Blue Analogue Derived CoS₂/FeS₂ Confined in N, S Dual-Doped Carbon Nanofibers for Sodium Storage