Increasing sulfur utilization in lithium-sulfur batteries by a Co-MOF-74@MWCNT interlayer

Sung, S. H.; Kim, Byung Hyuk; Lee, Seung Taek; Choi, Sung Chul; Yoon, Woo Young

doi:10.1016/j.jechem.2020.12.033

Cited by 42 publications

(7 citation statements)

References 40 publications

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“…Meanwhile, the periodic electron density distribution of CoHP could block LiPSs via electrostatic interaction and chemical trapping, as demonstrated by the abovementioned experiments and DFT calculation. Compared with previous results, − the battery performance of this work is considerably superior to those of most reported materials.…”

Section: Resultscontrasting

confidence: 57%

Electrostatic Potential-Induced Co–N₄ Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Song

et al. 2022

ACS Appl. Mater. Interfaces

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The use of single-atom catalysts is a promising approach to solve the issues of polysulfide shuttle and sluggish conversion chemistry in lithium−sulfur (Li−S) batteries. However, a single-atom catalyst usually contains a low content of active centers because more metal ions lead to generation of aggregation or the formation of nonatomic catalysts. Herein, a 2D conductive metal−organic framework [Co 3 (HITP) 2 ] with abundant and periodic Co−N 4 centers was decorated on carbon fiber paper as a functional interlayer for advanced Li−S batteries. The Co 3 (HITP) 2 -decorated interlayer exhibits a chemical anchoring effect and facilitates conversion kinetics, thus effectively restraining the polysulfide shuttle effect. Density functional theory calculations demonstrate that the Co−N 4 centers in Co 3 (HITP) 2 feature more intense electron density and more negative electrostatic potential distribution than those in the carbon matrix as the singleatom catalyst, thereby promoting the electrochemical performance due to the lower reaction Gibbs free energies and decomposition energy barriers. As a result, the optimized batteries deliver a high rate capacity of over 400 mA h g −1 at 4 C current and a satisfying capacity decay rate of 0.028% per cycle over 1000 cycles at 1 C. The designed Co 3 (HITP) 2 -decorated interlayer was used to prepare one of the most advanced Li−S batteries with excellent performance (reversible capacity of 762 mA h g −1 and 79.6% capacity retention over 500 cycles) under high-temperature conditions, implying its great potential for practical applications.

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Section: Resultscontrasting

confidence: 57%

Electrostatic Potential-Induced Co–N₄ Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Song

et al. 2022

ACS Appl. Mater. Interfaces

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“…A bond of 160.6 eV corresponds to a sulfide diene (S2 − ), which is Li 2 S. 15,43 Moreover, the peak around 162∼160 eV is confirmed only in the Co 3 O 4 @MWCNT interlayer.…”

Section: Resultsmentioning

confidence: 97%

“…Finally, the slurrycoated Al foil was dried in a convection oven at 60 °C overnight. 24,43 The diameter of the sulfur cathode was 10 mm and the loading level was approximately 1.5 mg cm −2 . The specific capacity of the electrode was calculated according to the weight of the cathode materials.…”

Section: Synthesis Of Hollow Comentioning

confidence: 99%

Electrochemical Effects of the Hollow Structure Co₃O₄/MWCNT Interlayer Derived through ZIF-67 in Lithium-Sulfur Batteries

Choi¹,

Yoon²,

Kim³

et al. 2023

J. Electrochem. Soc.

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The self-standing ZIF-67 derived Co3O4@multi-walled carbon nanotube (MWCNT) interlayer is prepared without a binder and conductor. The hollow structure of ZIF-67 derived Co3O4 is confirmed through scanning electron microscopy and transmission electron microscopy analysis. X-ray diffraction analysis confirms the synthesis of ZIF-67 and the subsequent formation of ligand-free Co3O4 after thermal decomposition. Brunnauer-Emmett-Teller analysis also confirms a specific surface area of approximately 139.72 m2/g2. Through polarization measurements, it is confirmed that the Co3O4 acts effectively as a catalyst, reducing polarization by more than 22% compared to when it is not used. After 10 cycles, the capacity of the Co3O4@MWCNT cell is 1120.65 mAh/g, which is 315 mAh/g higher than that of an MWCNT cell (805 mAh/g). The Co3O4 promotes the conversion from Li2S4 to Li2S2 and Li2S, which leads to higher capacity. Moreover, the cycle stability improves by more than 28% by adsorbing more polysulfide through the hollow structure. Furthermore, it is confirmed that Co3O4@MWCNT exhibits approximately 33% less polarization compared to MWCNT even under high C-rate conditions (2C rate). Various electrochemical characteristics and X-ray photoelectron spectroscopy reveal that the hollow Co3O4 physically and chemically suppresses the shuttling phenomenon.

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“…Particularly, MOFs have attracted substantial interests for their great potential as interlayer materials of Li-S batteries, considering their abundant porosity and structural adjustability [13]. It is worth noting that the present MOFs-based interlayers are mainly designed based on adsorption, including adsorption and adsorption-catalysis, which may be limited by the finite acting sites [14,15].…”

Section: Introductionmentioning

confidence: 99%

Constructing MIL-101(Cr) membranes on carbon nanotube films as ion-selective interlayers for lithium–sulfur batteries

Zhang

Gao

et al. 2022

Nanotechnology

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It is of significant importance to suppress the polysulfide shuttle effect for the commercial application of lithium-sulfur batteries. Herein, continuous MIL-101(Cr) membranes were successfully fabricated on carbon nanotube films utilizing a simple in-situ growth method, aiming at constructing interlayer materials for inhibiting the shuttle effect. Owing to the suitable pore aperture and super electrolyte wettability, the as-developed MIL-101(Cr) membrane can effectively inhibit the shuttle behaviour of polysulfides while allowing the fast transport of Li-ions simultaneously, working as an ionic sieve. Additionally, this MOFs membrane is also helpful in accelerating the polysulfide catalytic conversion. Therefore, the proposed interlayer delivers an extraordinary rate capability, showing a remarkable capacity of 661.9 mAh g-1 under 5 C. Meanwhile, it also exhibits a high initial capacity of 816.1 mAh g-1 at 1 C and an exceptional durability with an extremely low capacity fading of 0.046 % per cycle over 500 cycles.

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Increasing sulfur utilization in lithium-sulfur batteries by a Co-MOF-74@MWCNT interlayer

Cited by 42 publications

References 40 publications

Electrostatic Potential-Induced Co–N₄ Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Electrostatic Potential-Induced Co–N₄ Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Electrochemical Effects of the Hollow Structure Co₃O₄/MWCNT Interlayer Derived through ZIF-67 in Lithium-Sulfur Batteries

Constructing MIL-101(Cr) membranes on carbon nanotube films as ion-selective interlayers for lithium–sulfur batteries

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Increasing sulfur utilization in lithium-sulfur batteries by a Co-MOF-74@MWCNT interlayer

Cited by 42 publications

References 40 publications

Electrostatic Potential-Induced Co–N4 Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Electrostatic Potential-Induced Co–N4 Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Electrochemical Effects of the Hollow Structure Co3O4/MWCNT Interlayer Derived through ZIF-67 in Lithium-Sulfur Batteries

Constructing MIL-101(Cr) membranes on carbon nanotube films as ion-selective interlayers for lithium–sulfur batteries

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Product

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Electrostatic Potential-Induced Co–N₄ Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Electrostatic Potential-Induced Co–N₄ Active Centers in a 2D Conductive Metal–Organic Framework for High-Performance Lithium–Sulfur Batteries

Electrochemical Effects of the Hollow Structure Co₃O₄/MWCNT Interlayer Derived through ZIF-67 in Lithium-Sulfur Batteries