Hierarchical porous carbon nanofibers with ultrasmall-sized cobalt disulfide/tungsten disulfide hybrid composites for high-rate lithium storage kinetics

Shin, Dong-Yo; Lee, Jungsoo; Ahn, Hyo‐Jin

doi:10.1016/j.apsusc.2021.149298

Cited by 11 publications

(10 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the CoS 2 @CNTs@C electrode can deliver a specific capacity of 558.8 mA h g –1 at 2000 mA g –1 in 600 cycles with a capacity retention of 96.1% (Figure e). In comparison with the reported CoS 2 electrode for lithium-ion batteries, CoS 2 @CNTs@C shows a dramatically improved reversible capacity at 200 mA g –1 and rate capability even at high current densities of 2000 and 5000 mA g –1 (Figure f and g). − …”

Section: Results and Discussionmentioning

confidence: 83%

“…(a) Cycle curves at 200 mA g –1 , (b) CV curves at 0.5 mV s –1 , (c) cycling performance at 200 mA g –1 , (d) rate capability, and (e) long-term cycling performance at 2000 mA g –1 of the CoS 2 @CNTs@C electrode. A comparison chart of CoS 2 @CNTs@C with the CoS 2 composites reported in the literatures, (f) the specific capacity (note: cycle number in brackets), and (g) the rate capability. − …”

Section: Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Sulfide with Oxygen-Rich Carbon Network for Good Lithium-Storage Kinetics

Xue

Zhao

et al. 2021

ACS Nano

View full text Add to dashboard Cite

Transition metal sulfides are of great interest as electrode material for alkali metal-ion batteries due to their high theoretical capacity. However, sluggish ion migration and electron transfer kinetics lead to poor cycling stability and rate performance, which hinders their practical applications. Herein, we develop a two-step localized carbonization and sulfurization method to construct a CoS2 composite material (CoS2@CNTs@C) from an in situ integrated zeolitic imidazolate framework (ZIF-67) and multiwalled carbon nanotube precursor (ZIF-67@CNTs). The as-prepared CoS2@CNTs@C composites with a nanoscale carbon skeleton inherit a large specific surface area and suitable nanopore size distribution from ZIF-67 and incredibly abundant oxygenated functional groups from CNTs. The theoretical calculation and material characterization demonstrate that the oxygenated functional groups on the porous carbon networks accelerate lithium-ion diffusion and electron transfer and especially electrocatalyze the progressive conversion of Li2S6 to the final product Li2S. Meanwhile, the three-dimensional conductive network guarantees the conductive and structural stability of CoS2@CNTs@C during the repeated lithium-storage process. Therefore, the CoS2@CNTs@C electrode material can deliver an initial discharge capacity of 1282.3 mA h g–1 at 200 mA g–1 with a high Coulombic efficiency of 93.5% and a reversible capacity of 558.8 mA h g–1 at 2000 mA g–1 in 600 cycles with a high capacity retention of 96.1%.

show abstract

Section: Results and Discussionmentioning

confidence: 83%

Section: Results and Discussionmentioning

confidence: 99%

Sulfide with Oxygen-Rich Carbon Network for Good Lithium-Storage Kinetics

Xue

Zhao

et al. 2021

ACS Nano

View full text Add to dashboard Cite

show abstract

“…Thus, for the CNF@SnSNT-C7 samples, the mesoporous CNFs in the hierarchical core@shell structure of the CNF@SnSNTs inhibit the Li-ion diffusion pathway, enhancing the ultrafast electrochemical performance. 23,24 To further analyze the nanostructure, we used TEM to analyze the CNF@SnSNF-C7 sample. In the lowresolution TEM images (Figure 3A), the CNF@SnSNF-C7 sample possessed a 1D nanotube structure with diameters ranging from ≈309.7 to 350.4 nm.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, owing to the optimized L‐cysteine effect, the CNF@SnSNT‐C7 samples had the highest specific surface area and mesoporous fraction (Figure S4 and Table S1). Thus, for the CNF@SnSNT‐C7 samples, the mesoporous CNFs in the hierarchical core@shell structure of the CNF@SnSNTs inhibit the Li‐ion diffusion pathway, enhancing the ultrafast electrochemical performance 23,24 …”

Section: Resultsmentioning

confidence: 99%

Hierarchical carbon nanofibers@tin sulfide nanotube with sulfur‐doped carbon layer for ultrafast lithium‐storage capability

Sung

Ahn

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Combining a high‐capacity material possessing a core@shell structure with a carbon material is a powerful tactic for reinforcing the performance of Li‐ion battery (LIB) anodes. As an efficient and simple approach to obtain tin(II) sulfide (SnS) with ultrafast lithium‐storage capability and cycling stability, we propose the hierarchical core@shell structure of carbon nanofibers@SnS nanotubes (CNF@SnSNTs) covered with S‐doped carbon via a one‐pot carbonization by harnessing the Kirkendall effect of camphene and sulfurization of SnO2 by L‐cysteine. This hierarchical core@shell structure contains mesoporous carbon nanofibers (CNFs) that reduce the Li‐ion diffusion pathway, SnS nanotubes (NTs) that expand the active site, and a S‐doped carbon layer at the faces of the SnS NTs that promotes the electrical conductivity and inhibits volume expansion of SnS. Therefore, a CNF@SnSNT‐C7 electrode achieves superb ultrafast electrochemical performance (528.1 mAh/g under a current density of 2000 mA/g), high specific capacity (2218.2 mAh/g under a current density of 100 mA/g), and an ultrafast cycling stability of 92.9% after 500 cycles under a current density of 2000 mA/g. These performance improvements are resulted from the synergistical effect of mesoporous CNFs, SnS NTs, and S‐doped carbon layer. Therefore, CNF@SnSNT is potential anode material for LIBs having superior Li‐storage capability.

show abstract

“…[104,[110][111][112][113][114] c), Hollow MCs were served as nanocages to encapsulate active materials. [36,55,69,105,[115][116][117][118][119][120][121][122] In charge-discharge cycles, carbon shell or carbon skeleton type structures precisely confine the volume change of active materials particles while the mesopores and conductive walls provide efficient mass transport and fast charge transfer routes. These mesoporous structures can also serve as nanoreactors to regulate the in situ growth of active materials during the synthesis process, which can precisely downsize the active material NPs and further improve the anode electrochemical performance.…”

Section: Enhance Alloy-type and Conversion-type Anodementioning

confidence: 99%

Mesoporous Carbon Materials for Electrochemical Energy Storage and Conversion

Yuan

Gao

et al. 2022

ChemElectroChem

View full text Add to dashboard Cite

To meet the high‐speed commercialization demands of electrochemical energy storage and conversion devices, the development of high‐performance and low‐cost electrode materials is urgently necessary. Mesoporous carbon, which shows excellent intrinsic characteristics and flexible structure, has raised a surge of interest recently since it offers opportunities for improving the energy or power density and durability as well as reducing the cost of electrodes. In this paper, we first review primary methods for preparing mesoporous carbons. Next, the obstacles in lithium batteries, supercapacitors, proton exchange membrane fuel cells and water electrolyzers are analyzed and the recent progresses of mesoporous carbon based electrode designs in solving these obstacles are systematically introduced. Finally, we outline current challenges and future directions of developing mesoporous carbon based electrode materials in electrochemical energy storage and conversion devices. In creating this review, we hope to give a succinct introduction to the mesoporous carbon and provide meaningful references for its future research.

show abstract

Hierarchical porous carbon nanofibers with ultrasmall-sized cobalt disulfide/tungsten disulfide hybrid composites for high-rate lithium storage kinetics

Cited by 11 publications

References 33 publications

Sulfide with Oxygen-Rich Carbon Network for Good Lithium-Storage Kinetics

Sulfide with Oxygen-Rich Carbon Network for Good Lithium-Storage Kinetics

Hierarchical carbon nanofibers@tin sulfide nanotube with sulfur‐doped carbon layer for ultrafast lithium‐storage capability

Mesoporous Carbon Materials for Electrochemical Energy Storage and Conversion

Contact Info

Product

Resources

About