Hybrid nanocomposites of tunneled-mesoporous sulfur-doped carbon nanofibers embedded with zinc sulfide nanoparticles for ultrafast lithium storage capability

Sung, Ki‐Wook; Koo, Bon‐Ryul; Ahn, Hyo‐Jin

doi:10.1016/j.jallcom.2020.157206

Cited by 22 publications

(10 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The C1s spectrum of the CQD-SP-Al (see Figure 4B) showed five characteristic peaks at $283.7, $284.5, $285.3, $286.4, and $288.8 eV, corresponding to the C=C, C-C, C-O, C-N, and O-C=O bindings, respectively. 26 Furthermore, in the O1s spectrum of CQD-SP-Al (see Figure 4C), four characteristic peaks were observed at $530.3, $531.3, $532.4, and $533.2 eV, corresponding to the C=O, Al-O, C-O, and H-O bonds, respectively. 27,28 From the C=C bonding, C-C bonding, and oxygen-containing functional groups of CQD-SP-Al, it was confirmed that the CQD layer was well coated on the CQD-SP-Al surface.…”

Section: Resultsmentioning

confidence: 96%

“…The Li + ion diffusion coefficients about all electrodes were computed by the Warburg impedance using Equations ( 4) and ( 5). 26,31…”

Section: Resultsmentioning

confidence: 99%

“…All XPS spectra were calibrated at a C1s binding energy of ~284.5 eV. The C1s spectrum of the CQD‐SP‐Al (see Figure 4B) showed five characteristic peaks at ~283.7, ~284.5, ~285.3, ~286.4, and ~288.8 eV, corresponding to the C=C, C–C, C–O, C–N, and O–C=O bindings, respectively 26 . Furthermore, in the O1s spectrum of CQD‐SP‐Al (see Figure 4C), four characteristic peaks were observed at ~530.3, ~531.3, ~532.4, and ~533.2 eV, corresponding to the C=O, Al–O, C–O, and H–O bonds, respectively 27,28 .…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, as shown in Figure 5B, the R ct and Warburg impedance of the CQD‐SP‐Al electrode was the lowest in the group of all electrodes. The Li + ion diffusion coefficients about all electrodes were computed by the Warburg impedance using Equations (4) and (5) 26,31

Z_{real} goodbreak= R_{e} goodbreak+ R_{ct} goodbreak+ σ_{w} ω^{- 1 / 2}

D goodbreak= R^{2} T^{2} / 2 A^{2} n^{4} F^{4} C^{2} σ_{w}

where R e and σ w are the bulk resistance in a cell and the Warburg impedance coefficient, respectively.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Carbon quantum dot‐laminated stepped porous Al current collector for stable and ultrafast lithium‐ion batteries

Sung

Kim

Ahn

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Designing an interfacial architecture between the current collector and electrode plays a serious role in developing the specific capacity with cycling stability of lithium-ion batteries (LIBs). Consequently, an original approach to enhance the structure of the interface between the current collector and electrode is necessary. Thus, we developed a novel interface architecture based on carbon quantum dots (CQDs)-laminated on a stepped porous Al (SP-Al) current collector to attain stable and ultrafast-discharge LIBs and CQD-SP-Al for application as LIB cathodes. To this end, the electrochemical etching and ultrasonic spray coating methods were employed. The cathode assembled with CQD-SP-Al displayed the adhesion enhancing, an increased redox reaction kinetics, and the magnificent interfacial stability of the current collector//electrode interface because of the increased surface roughness, stepped pores with N-doped CQD, and uniform CQD lamination layer. The resultant cathode with CQD-SP-Al showed an enhanced specific capacity of 78.2 mAh/g and capacity retention of 92.6% at a high C-rate of 10C after 500 cycles. This great cycling stability is due to an expanded interfacial contact area of current collector// electrode with improved adhesion, as well as to the CQD lamination layer, while the excellent ultrafast discharge capacity is ascribed to the risen number of charge supplying/collecting sites, the stepped porous structure, and the highly conductive N-doped CQD lamination layer.

show abstract

Section: Resultsmentioning

confidence: 96%

“…The Li + ion diffusion coefficients about all electrodes were computed by the Warburg impedance using Equations ( 4) and ( 5). 26,31…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Z_{real} goodbreak= R_{e} goodbreak+ R_{ct} goodbreak+ σ_{w} ω^{- 1 / 2}

D goodbreak= R^{2} T^{2} / 2 A^{2} n^{4} F^{4} C^{2} σ_{w}

where R e and σ w are the bulk resistance in a cell and the Warburg impedance coefficient, respectively.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Carbon quantum dot‐laminated stepped porous Al current collector for stable and ultrafast lithium‐ion batteries

Sung

Kim

Ahn

2022

Intl J of Energy Research

View full text Add to dashboard Cite

show abstract

“…[83] Carbon and its analogues have been widely used as anode materials in LIBs due to its abundant active reaction sites, high ions adsorption/desorption capability, and high electrical conductivity. [84,85] High mass loading carbon-based electrodes with tailored porosities in large-scale production are required in practical applications. Porous secondary microparticles ranging from 8 to 15 µm were constructed by using MgAl-layered double oxides as both template and carbon resource.…”

Section: Creating Available Porositiesmentioning

confidence: 99%

Commercialization‐Driven Electrodes Design for Lithium Batteries: Basic Guidance, Opportunities, and Perspectives

Cao

Liang

Zhang

et al. 2021

Small

View full text Add to dashboard Cite

vehicles (HEVs), because of their high energy density and long lifetime. [1][2][3] In recent years, the ever-growing demand on electric vehicles contributes to the continuous growth of the battery market, and the energy storage devices of EVs/HEVs raise stern demands on higher energy density (>300 Wh kg −1 ) and lower cost (500 Wh kg −1 ), and the standard parameters for different electrode systems toward this high energy density goal are well summarized in the previous works. [7][8][9] In particular, the innovative battery chemistries (i.e., Li-metal battery and all-solid-state lithium battery) using Li metal as anode, exhibit much higher energy density than current lithium-ion batteries, whereas some technological issues are needed to be addressed first, such as dendrite formation suppression, industrial battery Current lithium-ion battery technology is approaching the theoretical energy density limitation, which is challenged by the increasing requirements of ever-growing energy storage market of electric vehicles, hybrid electric vehicles, and portable electronic devices. Although great progresses are made on tailoring the electrode materials from methodology to mechanism to meet the practical demands, sluggish mass transport, and charge transfer dynamics are the main bottlenecks when increasing the areal/volumetric loading multiple times to commercial level. Thus, this review presents the state-of-the-art developments on rational design of the commercialization-driven electrodes for lithium batteries. First, the basic guidance and challenges (such as electrode mechanical instability, sluggish charge diffusion, deteriorated performance, and safety concerns) on constructing the industry-required high mass loading electrodes toward commercialization are discussed. Second, the corresponding design strategies on cathode/anode electrode materials with high mass loading are proposed to overcome these challenges without compromising energy density and cycling durability, including electrode architecture, integrated configuration, interface engineering, mechanical compression, and Li metal protection. Finally, the future trends and perspectives on commercializationdriven electrodes are offered. These design principles and potential strategies are also promising to be applied in other...

show abstract

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

Hybrid nanocomposites of tunneled-mesoporous sulfur-doped carbon nanofibers embedded with zinc sulfide nanoparticles for ultrafast lithium storage capability

Cited by 22 publications

References 41 publications

Carbon quantum dot‐laminated stepped porous Al current collector for stable and ultrafast lithium‐ion batteries

Carbon quantum dot‐laminated stepped porous Al current collector for stable and ultrafast lithium‐ion batteries

Commercialization‐Driven Electrodes Design for Lithium Batteries: Basic Guidance, Opportunities, and Perspectives

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

Contact Info

Product

Resources

About