Space and interface confinement effect of necklace-box structural FeS2/WS2 carbon nanofibers to enhance Na+ storage performance and electrochemical kinetics

Wu, Huayu; Xu, Nuo; Jiang, Zhouheng; Zheng, Anyu; Qiu, Shi; Lv, Rongguan; Ni, Lubin; Diao, Guowang; Chen, Ming

doi:10.1016/j.cej.2021.131002

Cited by 48 publications

(34 citation statements)

References 50 publications

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“…The phenomenon is common for anodes based on conversion reaction mechanism and may be related to the fine particle size and low crystallinity of final desodiation product. [4,13,53] Furthermore, ex situ TEM and HRTEM images of the first cycle are supplemented to dig out the reaction mechanism. In the fully discharged stage, the Ti 3 C 2 T x MXene manifests a markedly enlarged interlayer spacing and Na 2 S (111) plane with a lattice spacing of 0.38 nm can be captured (Figure 5e-g and Figure S31, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Molten Salts Etching Route Driven Universal Construction of MXene/Transition Metal Sulfides Heterostructures with Interfacial Electronic Coupling for Superior Sodium Storage

Huang

Ying

Zhang

et al. 2022

Advanced Energy Materials

100

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Recently, transition metal sulfides (TMSs) have been widely investigated as one of the promising anodes for SIBs owing to their superior electrochemical activities, high theoretical capacities, weak metalsulfur bond, and safe sodiation/desodiation potential. [6][7][8] Unfortunately, the rapid capacity degradation and unsatisfactory rate capability of TMSs anodes caused by the large volume stress, poor electronic conductivity, and high Na + migration energy barrier significantly deteriorate their commercial application. [9][10][11][12] To solve the intrinsic obstacles of TMSs anodes, several common and viable strategies have been proposed up to now, such as designing heterostructures, introducing vacancies, dimension reduction, and morphology control. [6,9,[13][14][15][16] Among them, heterostructure engineering by coupling TMSs with traditional carbon materials can accelerate the charge/mass transfer kinetics, expose more active sites and buffer the huge volumetric stress of TMSs upon cycling, [4,17] which are beneficial for the enhancement of short-term electrochemical performance. Nonetheless, the nonpolar nature of carbon materials makes it difficult to form strong interfacial electronic coupling between carbon substrate and polar TMSs, [4,18,19] which generally results in the relatively large interfacial electronic transfer resistance and insufficient confinement on TMSs during repeated Na + insertion/extraction process, finally leading to inferior long-term cyclic performance. Therefore, great efforts still need to be devoted to the elaborate structural design of TMSs-based heterostructures with extremely accelerated charge transfer and interfacial electronic interaction.As an emerging member of 2D materials, transition metal carbides or carbonitrides known as MXenes possess excellent redox activity, large and tunable interlayer spacing, metalliclevel conductivity, and low ion migration barrier. [5,[20][21][22] Furthermore, abundant surface groups such as O, OH, and F are prone to decorate MXenes during the hydrofluoric acid (HF) aqueous solution etching process, which endows MXenes with a chemical formula of M n+1 X n T x (where T x refers to surface groups), strong polarity, and the excellent ability to tune the charge distribution. [23][24][25][26] Consequently, derived from the advantages of MXenes, it can be anticipated that the electronic The MXene-based heterostructures have recently attracted great interest as anode materials for sodium-ion batteries (SIBs). Nonetheless, the complicated and harsh preparation process impedes their further commercialization. Herein, a novel, safe, low-destructive, and universal strategy for rationally fabricating Ti 3 C 2 T x MXene/transition metal sulfides (MS y ) heterostructures is presented via Lewis acidic molten salts etching and subsequent in situ sulfurization treatment. Benefiting from the interfacial electronic coupling between highly conductive Ti 3 C 2 T x MXene (T x = O and Cl) and MS y (M = Fe, Co and Ni), the heterostructures possess remarkably impr...

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Section: Resultsmentioning

confidence: 99%

Molten Salts Etching Route Driven Universal Construction of MXene/Transition Metal Sulfides Heterostructures with Interfacial Electronic Coupling for Superior Sodium Storage

Huang

Ying

Zhang

et al. 2022

Advanced Energy Materials

100

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“…More importantly, both the peak (002) of MXene and the peak (001) of ReSe 2 are shifted toward lower angles after compositing with ReSe 2 or Te doping treatment (Fig. S3), suggesting the expected increase in layer spacings for MXene and ReSe 2 in Te-ReSe 2 /MXene due to the interface/space confined effects [33].…”

Section: Resultsmentioning

confidence: 97%

Defective 1T′-ReSe2 nanosheets vertically grown on elastic MXene for fast and stable potassium ion storage

et al. 2022

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The sluggish reaction kinetics and poor structure stability of transition metal dichalcogenides (TMDs)based anodes in potassium-ion batteries (KIBs) usually cause limited rate performance and rapid capacity decay, which seriously impede their application. Herein, we report a vacancy engineering strategy for preparing a class of Te-doped 1T'-ReSe 2 anchored onto MXene (Te-ReSe 2 /MXene) as an advanced anode for KIBs with high performance. By taking advantage of the synergistic effects of the defective Te-ReSe 2 arrays with expanded interlayers and the elastic MXene nanosheets with self-autoadjustable function, the Te-ReSe 2 / MXene superstructure exhibits boosted K + ion storage performance, in terms of high reversible capacity (361.1 mA h g −1 at 0.1 A g −1 over 200 cycles), excellent rate capability (179.3 mA h g −1 at 20 A g −1 ), ultra-long cycle life (202.8 mA h g −1 at 5 A g −1 over 2000 cycles), and steady operation in flexible full battery, presenting one of the best performances among the TMDs-based anodes reported thus far. The kinetics analysis and theoretical calculations further indicate that satisfactory pseudocapacitive property, high electronic conductivity and outstanding K + ion adsorption/ diffusion capability corroborate the accelerated reaction kinetics. Especially, structural characterizations clearly elaborate that the Te-ReSe 2 /MXene undergoes reversible evolutions of an initial insertion process followed by a conversion reaction.

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“…Moreover, it is not difficult to find that the MnO/C-12 h sample exhibits better rate performance than pure MnO, giving a doubtless evidence of the structural advantage toward improving the lithium storage performance. The interlaced carbon network in MnO/C-12 h could construct a rapid transmission channel for ions and electrons, which accounts for its better electrochemical performance …”

Section: Resultsmentioning

confidence: 99%

“…The interlaced carbon network in MnO/ C-12 h could construct a rapid transmission channel for ions and electrons, which accounts for its better electrochemical performance. 56 Figure 4d shows the cycling comparison of pure MnO, MnO/C-12 h, and MnO@MnS/C at a current density of 1.0 A•g −1 . Obviously, the MnO@MnS/C heterostructure manifests the strongest lithium storage behavior, and it provides a discharge specific capacity of 784 mAh•g −1 after 500 cycles.…”

Section: Resultsmentioning

confidence: 99%

Rational Design of Space-Confined Mn-Based Heterostructures with Synergistic Interfacial Charge Transport and Structural Integrity for Lithium Storage

Zhang

Yin

et al. 2022

Inorg. Chem.

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Manganese-based compounds are expected to become promising candidates for lithium-ion battery anodes by virtue of their high theoretical specific capacity and low conversion potential. However, their application is hindered by their inferior electrical conductivity and drastic volume variations. In this work, a unique heterostructure composed of MnO and MnS spatially confined in pyrolytic carbon microspheres (MnO@MnS/C) was synthesized through an integrated solvothermal method, calcination, and low-temperature vulcanization technology. In this architecture, heterostructured MnO@MnS nanoparticles (∼10 nm) are uniformly embedded into the carbonaceous microsphere matrix to maintain the structural stability of the composite. Benefiting from the combination of structural and compositional features, the MnO@MnS/C enables abundance in electrochemically active sites, alleviated volumetric variation, a rich conductive network, and enhanced lithium-ion diffusion kinetics, thus yielding remarkable rate capability (1235 mAh·g–1 at 0.2 A·g–1 and 608 mAh·g–1 at 3.2 A·g–1) and exceptional cycling stability (522 mAh·g–1 after 2000 cycles at 3.0 A·g–1) as a competitive anode material for lithium-ion batteries. Density functional theory calculations unveil that the heterostructure promotes the transfer of electrons with improved conductivity and also accelerates the migration of lithium ions with reduced polarization resistance. This combined with the enhancement brought by spatial confinement endows the MnO@MnS/C with remarkable lithium storage performance.

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Space and interface confinement effect of necklace-box structural FeS2/WS2 carbon nanofibers to enhance Na+ storage performance and electrochemical kinetics

Cited by 48 publications

References 50 publications

Molten Salts Etching Route Driven Universal Construction of MXene/Transition Metal Sulfides Heterostructures with Interfacial Electronic Coupling for Superior Sodium Storage

Molten Salts Etching Route Driven Universal Construction of MXene/Transition Metal Sulfides Heterostructures with Interfacial Electronic Coupling for Superior Sodium Storage

Defective 1T′-ReSe2 nanosheets vertically grown on elastic MXene for fast and stable potassium ion storage

Rational Design of Space-Confined Mn-Based Heterostructures with Synergistic Interfacial Charge Transport and Structural Integrity for Lithium Storage

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