CoNi-ZIF-derived NiCo2Se4-NC promotes polysulfide adsorption and reaction kinetics in high-performance lithium-sulfur batteries

Niu, Yueping; Feng, Wangjun; Hu, Wenting; Zhao, Zhifeng; Zhang, Li

doi:10.1016/j.apsusc.2023.158145

Cited by 8 publications

(1 citation statement)

References 70 publications

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“…The speci c surface area and pore structure of CoNi-NC@Bi 2 S 3 cathode materials were characterized using BET analysis. Figure 2c displays the nitrogen adsorption-desorption isotherm of CoNi-NC@Bi 2 S 3 , which exhibits type IV isotherms, indicating that the composite primarily consists of mesopores [22] . Figure 2d illustrates that the pore size distribution of CoNi-NC@Bi 2 S 3 material predominantly ranges from 2 to 7 nm.…”

Section: Resultsmentioning

confidence: 99%

Use of CoNi-ZIF-derived Bimetallic-Doped Nitrogen-Rich Porous Carbon (CoNi-NC) Composite Bi 2 S 3 in Lithium-Sulfur Batteries

Zhao,

Feng,

Niu

et al. 2024

Preprint

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Lithium-sulfur batteries have not been widely commercialized due to issues with poor conductivity of the active material and the shuttle effect, both of which are effectively addressed in this study. The porous carbon CoNi-NC, derived from high-temperature carbonization of the cobalt-nickel metal-organic framework CoNi-ZIF, was utilized as the carbon substrate. It exhibits excellent specific surface area and a well-developed pore structure, thereby optimizing the conductivity and sulfur-loading capacity of the material. The incorporation of polar Bi2S3 effectively adsorbs polysulfides, retards the shuttle effect, and enhances the reaction kinetics of lithium-sulfur batteries. Electrochemical tests revealed that the CoNi-NC@Bi2S3 electrode achieved a specific discharge capacity of 1107 mAh/g at a current density of 0.1 C, demonstrating excellent rate capability. Moreover, the cathode material maintained a specific discharge capacity of 796.5 mAh/g after 200 cycles at 0.2 C, indicating robust cycling stability.

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Section: Resultsmentioning

confidence: 99%

Use of CoNi-ZIF-derived Bimetallic-Doped Nitrogen-Rich Porous Carbon (CoNi-NC) Composite Bi 2 S 3 in Lithium-Sulfur Batteries

Zhao,

Feng,

Niu

et al. 2024

Preprint

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Accelerated Ion‐Electron Transport in Bi‐Heterostructures Constructed Based on Ohmic Contacts for Efficient Bi‐Directional Catalysis of Lithium‐Sulfur Batteries

Chen,

Li,

Lei

et al. 2024

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Although lithium‐sulfur batteries have satisfactory theoretical specific capacity and energy density, they are difficult to further commercialize due to the shuttle effect of soluble polysulfides and slow sulfur oxidation kinetics. Based on this, in this work, the catalyst MXene‐VS4‐SnS2 (MVS), a dual heterostructured catalyst with ohmic contacts, is prepared by a one‐step hydrothermal method and electrostatic self‐adsorption for lithium‐sulfur battery cathode materials. Experimental and theoretical results show that the ohmic contact induces spontaneous charge rearrangement, resulting in the formation of a fast charge transfer pathway at the MVS heterojunction interface, which helps to reduce the energy barrier for polysulfide reduction and Li2S oxidation during the discharge/charge process. In addition, the inherent sulfophilicity of VS4 and SnS2 promotes the conversion of S species, while the pleated MXene nanosheets not only provide a highly conductive network for the active sulfur but also retain a rich internal space to maintain the integrity of the cathode structure during the continuous cycling process. As a result, the MVS cathode exhibits excellent electrochemical performance even under high sulfur loading. The integration of excellent performance with a facile synthesis process provides a promising approach for designing highly efficient electrocatalysts suitable for the energy field.

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Use of CoNi-ZIF-derived bimetallic-doped nitrogen-rich porous carbon (CoNi-NC) composite Bi2S3 in lithium-sulfur batteries

Zhao,

Feng,

Niu

et al. 2024

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CoNi-ZIF-derived NiCo2Se4-NC promotes polysulfide adsorption and reaction kinetics in high-performance lithium-sulfur batteries

Cited by 8 publications

References 70 publications

Use of CoNi-ZIF-derived Bimetallic-Doped Nitrogen-Rich Porous Carbon (CoNi-NC) Composite Bi 2 S 3 in Lithium-Sulfur Batteries

Use of CoNi-ZIF-derived Bimetallic-Doped Nitrogen-Rich Porous Carbon (CoNi-NC) Composite Bi 2 S 3 in Lithium-Sulfur Batteries

Accelerated Ion‐Electron Transport in Bi‐Heterostructures Constructed Based on Ohmic Contacts for Efficient Bi‐Directional Catalysis of Lithium‐Sulfur Batteries

Use of CoNi-ZIF-derived bimetallic-doped nitrogen-rich porous carbon (CoNi-NC) composite Bi2S3 in lithium-sulfur batteries

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