Facile hydrothermal construction of Nb2CT /Nb2O5 as a hybrid anode material for high-performance Li-ion batteries

Q, Li; Xu, Shuangyan; Liu, Yang; Zhu, Shuhao; Hou, Linrui; Cheng, Yuan

doi:10.1016/j.cclet.2020.03.006

Cited by 35 publications

(8 citation statements)

References 24 publications

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“…Note that the (002) peak of V 2 CT x becomes inconspicuous in VSe 2 @V 2 CT x . Similar phenomena were also observed in reported MXene-based nanocomposites, in which the (002) peak of MXenes almost disappeared after compositing with other building blocks. − The decrease in the (002) peak intensity may be attributed to the relatively poor crystallinity of V 2 CT x and the low signal-to-noise ratio, although the exact reason is still unknown. In the XRD pattern of neat VSe 2 , the (002) peak of V 2 CT x disappears, indicating that V 2 CT x is fully converted to VSe 2 using excessive Se.…”

Section: Resultssupporting

confidence: 71%

Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

Sha

et al. 2022

ACS Nano

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MXenes are promising cathode materials for aqueous zinc-ion batteries (AZIBs) owing to their layered structure, metallic conductivity, and hydrophilicity. However, they suffer from low capacities unless they are subjected to electrochemically induced second phase formation, which is tedious, time-consuming, and uncontrollable. Here we propose a facile one-step surface selenization strategy for realizing advanced MXene-based nanohybrids. Through the selenization process, the surface metal atoms of MXenes are converted to transition metal selenides (TMSes) exhibiting high capacity and excellent structural stability, whereas the inner layers of MXenes are purposely retained. This strategy is applicable to various MXenes, as demonstrated by the successful construction of VSe2@V2CT x , TiSe2@Ti3C2T x , and NbSe2@Nb2CT x . Typically, VSe2@V2CT x delivers high-rate capability (132.7 mA h g–1 at 2.0 A g–1), long-term cyclability (93.1% capacity retention after 600 cycles at 2.0 A g–1), and high capacitive contribution (85.7% at 2.0 mV s–1). Detailed experimental and simulation results reveal that the superior Zn-ion storage is attributed to the engaging integration of V2CT x and VSe2, which not only significantly improves the Zn-ion diffusion coefficient from 4.3 × 10–15 to 3.7 × 10–13 cm2 s–1 but also provides sufficient structural stability for long-term cycling. This study offers a facile approach for the development of high-performance MXene-based materials for advanced aqueous metal-ion batteries.

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Section: Resultssupporting

confidence: 71%

Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

Sha

et al. 2022

ACS Nano

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“…At the same time, the (002) peak corresponding to V 2 CT x MXene becomes indiscernible, which is consistent with the reported Mxene-based composites. [32][33][34] XPS analysis was used to explore the valence transitions of the prepared materials before and aer oxidation.…”

Section: Resultsmentioning

confidence: 99%

A stepwise oxidation strategy for the synthesis of amorphous V₂O₅@V₂CT_xnanohybrid cathodes toward high-performance aqueous Zn-ion batteries

Wang

Zhang

et al. 2023

J. Mater. Chem. A

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“…MnO/Mn 2 O 3 is a nanocomposite structure superior to pure MnO 2 . The existence of a heterojunction can maintain the stability of the structure through sequential reactions, , which is revealed by the density functional theory (DFT) calculations. The two substances on both sides of the heterojunction are not reacted simultaneously.…”

Section: Introductionmentioning

confidence: 99%

MnO/Mn₂O₃ Nanowires Coated by Porous N-Doped Carbon for Long-Cycle and High-Rate Lithium-Ion Batteries

Zou

Dong

Guo

et al. 2020

ACS Appl. Nano Mater.

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Manganese oxides with versatile valence display an enormous potential in lithium-ion battery (LIB) anode materials, but deficient lithium storage capacity, short discharge platform, and inferior cycle stability at high current density greatly hinder their application. Herein, MnO/Mn 2 O 3 nanowires coated by porous N-doped carbon (MnO/Mn 2 O 3 −NC) layers are fabricated via wrapping ZIF-8 on MnO 2 combined with annealing postprocessing. In the LIB test, this material exhibits superior initial discharge specific capability (1429.4 mAh g −1 at 0.1 A g −1 ) and improved rate performance retention of 65% (10-fold amplification from 0.5 to 5 A g −1 ). Particularly, up to an ultrahigh current density of 10 A g −1 , this anode material also possesses great cycling stability of 87% after 10 000 cycles (merely 0.0013% capacity decay per cycle), which is the best among the reported values for Mn-based compounds. On the basis of experiment data and density functional theory (DFT) calculations, the superior stability for the MnO/Mn 2 O 3 −NC anode is mainly attributed to the mutual support characteristics of heterojunction synergy, thus avoiding damage and vice versa during the energy storage process. Generally, our work proposes a special nanostructure with heterojunction synergy to ameliorate the cycling stability and rate performance of manganese-based materials.

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Facile hydrothermal construction of Nb2CT /Nb2O5 as a hybrid anode material for high-performance Li-ion batteries

Cited by 35 publications

References 24 publications

Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

A stepwise oxidation strategy for the synthesis of amorphous V₂O₅@V₂CT_xnanohybrid cathodes toward high-performance aqueous Zn-ion batteries

MnO/Mn₂O₃ Nanowires Coated by Porous N-Doped Carbon for Long-Cycle and High-Rate Lithium-Ion Batteries

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Facile hydrothermal construction of Nb2CT /Nb2O5 as a hybrid anode material for high-performance Li-ion batteries

Cited by 35 publications

References 24 publications

Surface Selenization Strategy for V2CTx MXene toward Superior Zn-Ion Storage

Surface Selenization Strategy for V2CTx MXene toward Superior Zn-Ion Storage

A stepwise oxidation strategy for the synthesis of amorphous V2O5@V2CTxnanohybrid cathodes toward high-performance aqueous Zn-ion batteries

MnO/Mn2O3 Nanowires Coated by Porous N-Doped Carbon for Long-Cycle and High-Rate Lithium-Ion Batteries

Contact Info

Product

Resources

About

Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

A stepwise oxidation strategy for the synthesis of amorphous V₂O₅@V₂CT_xnanohybrid cathodes toward high-performance aqueous Zn-ion batteries

MnO/Mn₂O₃ Nanowires Coated by Porous N-Doped Carbon for Long-Cycle and High-Rate Lithium-Ion Batteries