One-dimensional porous nanostructure composed of few-layered MoSe2 nanosheets and highly densified-entangled-N-doped CNTs as anodes for Na ion batteries

Seon, Young Hoe; Kang, Yun Chan; Cho, Jung Sang

doi:10.1016/j.cej.2021.129051

Cited by 34 publications

(33 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The capacitive contribution of the MC‐Se@NC‐0.4 and bare MoSe 2 electrodes (82% for both at a scan rate of 1.5 mV s −1 ) were higher than those of the CoSe 2 @NC electrode (75% at a scan rate of 1.5 mV s −1 , Figure 5C,D, and Figure S16e‐h), suggesting more rapid reaction kinetics for the MC‐Se@NC‐0.4 and bare MoSe 2 electrodes. According to previous reports, 15,36,47 the high b and capacitive contribution values of MoSe 2 ‐based electrodes are attributed to the two‐dimensional structure of MoSe 2 , and a large interlayer spacing (~0.66 nm) can facilitate K + transport during the charge‐discharge process, which can result in the excellent rate capability of the electrodes.…”

Section: Resultsmentioning

confidence: 71%

Co‐MOF derived MoSe ₂ @ CoSe ₂ /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Kang

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Potassium ion batteries (KIBs) have attracted considerable attention as a nextgeneration large-scale energy storage system. Due to the large diameter of K + ions, developing advanced electrode materials to achieve high-performance KIBs is challenging. In this paper, one-dimensional (1D) hybrid nanostructures comprising a MoSe 2 core and a CoSe 2 /N-doped carbon shell (denoted as MC-Se@NC) are successfully synthesized by thermal treatment of Co-based metal-organic framework (ZIF-67)-coated MoO 3 nanorods. The unique 1D morphology and synergistic effect between the different elements provide sufficient electrochemical reaction sites and facilitate the reaction kinetics. Further, the N-doped carbon coating alleviates the volume fluctuation and pulverization of the active materials during cycling and improves the electrode conductivity. Accordingly, when applied to KIBs, the MC-Se@NC anode delivers a high reversible capacity of 327 mA h g À1 at 0.5 A g À1 after 150 cycles, and remarkable rate capability of 190 mA h g À1 at 2.0 A g À1 . Furthermore, to explore the practical application of MC-Se@NC anode, a K-ion full cell consisting of MC-Se@NC anode and Prussian blue cathode is fabricated and characterized. As a demonstration, a light-emitting diode (LED) is successfully powered by the K-ion full cell. These excellent electrochemical properties of MC-Se@NC present possibilities for the commercialization of KIB-based largescale energy storage systems.

show abstract

Section: Resultsmentioning

confidence: 71%

Co‐MOF derived MoSe ₂ @ CoSe ₂ /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Kang

2022

Intl J of Energy Research

View full text Add to dashboard Cite

show abstract

“…The cathodic peak at 0.67 V relates to sodium ion insertion into Na x Sb 2 Se 3 to generate metallic antimony (Na x Sb 2 Se 3 + (6– x )Na + + (6– x )e – → 2Sb + 3Na 2 Se), accompanied by the reduction of electrolyte to form the solid electrolyte interface (SEI) film. The peak at 0.38 V conforms to the alloy reaction of Sb to produce Na x Sb ( x = 1–3) and the conversion reaction of Na x MoSe 2 to form Mo and Na 2 Se (Sb + x Na + + x e – → Na x Sb, Na x MoSe 2 + (4– x )Na + + (4– x )e – → Mo + 2Na 2 Se) . Four oxidation peaks at 0.79, 1.39, 1.87, and 2.14 V appear in the charging process of the first cycle.…”

Section: Resultsmentioning

confidence: 71%

“…6 The cyclic voltammetry (CV) curves (for the initial three cycles) of the MoSe 2 −Sb 2 Se 3 @C composite tested at 0.01−3.0 V with a scan rate of 0. 29 Four oxidation peaks at 0.79, 1.39, 1.87, and 2.14 V appear in the charging process of the first cycle. Among them, the prominent oxidation peak at 1.87 V refers to the generation of MoSe 2 by Mo oxidation (Mo + 2Na 2 Se → MoSe 2 + 4Na + + 4e − ).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Heterojunction-Promoted Sodium Ion Storage of Bimetallic Selenides Encapsulated in a Carbon Sheath with Boosted Ion Diffusion and Stable Structure

Liu

Niu

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Although metallic chalcogenides are deemed as attractive sodium anode materials recently, the electrochemical performance is severely confined by the liability of structural collapse and sluggish ion diffusion kinetics. Herein a composite of carbon-encapsulated bimetallic selenides MoSe2–Sb2Se3 was prepared by a hydrothermal method on the basis of abundant reaction sites, high activity, an extra built-in electric field generated from heterointerfaces, and synergistic effects between the different components. Equally important, the carbon coating is effective to support the structural stability by restraining the vast volumetric variation to achieve the purpose of improving the cycling performance. The density functional theory calculation results indicate that the band gap is narrowed and that the work function is decreased on the interface of the MoSe2–Sb2Se3 heterojunction, leading to an additional driving force stemming from the introduction of the built-in electric field and the formation of the Sb–Se (Se from MoSe2) bond. Therefore, the resultant composite presents increased reaction kinetics and good electrochemical properties by acquiring a capacity of 376.0 mA h g–1 over 580 cycles at 2.0 A g–1 for the half-cell and 276 mA h g–1 over 750 cycles at 2 A g–1 for the full-cell. This work highlights bimetallic selenides with facilitated ion transferability with high performance.

show abstract

“…In N 1s spectrum, the peaks at 402.6, 400.5, 399.0, 397.6, and 395.0 eV can be indexed to graphitic-N, pyrrolic-N, metal–nitrogen bond (M–N), pyridinic-N, and Mo 3P 3/2 , respectively (Figure S3d). − Among them, the formation of M–N bonds indicates the adsorption of the transition metals in the C–N defects, which is conducive to the uniform arrangement of the MoO 4 2– –NiFe LDH nanosheets on N-CNTs arrays without aggregating. In the Mo 3d spectrum, the peaks situated at 235.2 and 232.1 eV correspond to Mo 6+ 2p 3/2 and Mo 6+ 2p 5/2 , respectively (Figure d) .…”

Section: Resultsmentioning

confidence: 99%

Trimetallic Mo-/Ni-/Fe-Based Hybrids Anchored on Hierarchical N-CNTs Arrays with Abundant Defects and Interfaces for Alkaline Water Splitting

Zhao

Liu

Deng

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The intrinsic catalytic activity of cost-effective non-noble transition-metal-based electrocatalysts greatly limits their overall water splitting efficiency. In this work, Mo-/Ni-/Fe-based ternary transition-metal composites are uniformly anchored on the hierarchical nitrogen-doped carbon nanotubes (N-CNTs)/carbon cloth (CC) via a one-pot hydrothermal process, followed by hydrogenation and sulfurization to obtain the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalysts, respectively. The rationally designed hybrids with various crystalline structures, heteroatom dopants, and large accessible surface areas can form abundant heterojunction interfaces and rich active defects to adjust the local electronic structure and intrinsic electrocatalytic capability. Therefore, the H-MoNiFe/N-CNTs-2 electrode reveals a low OER overpotential of 259.0 mV at 50 mA cm −2 and a small Tafel slope of 44.3 mV dec −1 , while the S-MoNiFe/N-CNTs-1 electrode exhibits a good HER overpotential of 130.7 mV at 10 mA cm −2 . Moreover, the electrolysis device exhibits a low cell voltage of 1.58 V at 10 mA cm −2 and maintains excellent catalytic activity under a high current for 12 h. This work provides a simple but rational composite electrode construction strategy with broad application prospects for electrocatalytic reactions.

show abstract

One-dimensional porous nanostructure composed of few-layered MoSe2 nanosheets and highly densified-entangled-N-doped CNTs as anodes for Na ion batteries

Cited by 34 publications

References 63 publications

Co‐MOF derived MoSe ₂ @ CoSe ₂ /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Co‐MOF derived MoSe ₂ @ CoSe ₂ /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Heterojunction-Promoted Sodium Ion Storage of Bimetallic Selenides Encapsulated in a Carbon Sheath with Boosted Ion Diffusion and Stable Structure

Trimetallic Mo-/Ni-/Fe-Based Hybrids Anchored on Hierarchical N-CNTs Arrays with Abundant Defects and Interfaces for Alkaline Water Splitting

Contact Info

Product

Resources

About

One-dimensional porous nanostructure composed of few-layered MoSe2 nanosheets and highly densified-entangled-N-doped CNTs as anodes for Na ion batteries

Cited by 34 publications

References 63 publications

Co‐MOF derived MoSe 2 @ CoSe 2 /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Co‐MOF derived MoSe 2 @ CoSe 2 /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Heterojunction-Promoted Sodium Ion Storage of Bimetallic Selenides Encapsulated in a Carbon Sheath with Boosted Ion Diffusion and Stable Structure

Trimetallic Mo-/Ni-/Fe-Based Hybrids Anchored on Hierarchical N-CNTs Arrays with Abundant Defects and Interfaces for Alkaline Water Splitting

Contact Info

Product

Resources

About

Co‐MOF derived MoSe ₂ @ CoSe ₂ /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries

Co‐MOF derived MoSe ₂ @ CoSe ₂ /N‐doped carbon nanorods as high‐performance anode materials for potassium ion batteries