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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Highly Effective Trapping-Conversion Interface Based on Nickel-Modified Versatile Carbon Skeleton Enabled

Dong Wang¹, Qi Cao¹, Lanyan Li¹

¹Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Xiangtan 411105, Hunan, China.

ACS Applied Materials & Interfaces

|April 6, 2021

Summary

This summary is machine-generated.

This study introduces a novel nickel-modified, nitrogen-doped carbon skeleton interlayer for lithium-sulfur batteries. This interlayer effectively suppresses polysulfide shuttling and enhances electrochemical performance, paving the way for advanced battery applications.

Keywords:

electrospun polar skeleton integrated adsorption and catalysis lithium−sulfur battery multifunctional interlayer nickel doped

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Lithium-sulfur batteries (LSBs) offer high theoretical energy density but face challenges like polysulfide shuttling and sluggish kinetics.
Interlayers are crucial for mitigating these issues and improving LSB performance.
Developing versatile interlayers that act as both adsorbents and catalysts remains a key research focus.

Purpose of the Study:

To design and synthesize a multifunctional interlayer for lithium-sulfur batteries.
To investigate the efficacy of a metallic nickel-modified and nitrogen-doped carbon skeleton (NCS) as an adsorbent and catalyst.
To enhance the cyclic stability, reaction kinetics, and overall electrochemical performance of LSBs.

Main Methods:

Fabrication of a tentacles-like metallic nickel-modified and nitrogen-doped carbon skeleton (NCS).
Characterization of the NCS material's structure and properties.
Electrochemical testing of LSBs utilizing the NCS interlayer, including capacity, cyclic stability, and Coulombic efficiency measurements at various sulfur loadings.

Main Results:

The NCS interlayer effectively constructs conductive networks and ion pathways.
Metallic nickel nanoparticles in the NCS facilitate polysulfide fixation and conversion, improving kinetics.
LSBs with NCS interlayer demonstrated high specific capacities (e.g., 1204.8 mAh g^-1 at 0.2C) and excellent cyclic stability, even at high sulfur loadings (up to 7.5 mg cm^-2).

Conclusions:

The developed NCS interlayer significantly improves the electrochemical performance of LSBs.
This work presents a promising strategy for utilizing metal nanoparticles in interlayers for advanced Li-S battery technology.
The multifunctional NCS interlayer effectively addresses polysulfide shuttling and enhances reaction kinetics.