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Construction and Testing of Coin Cells of Lithium Ion Batteries
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Cement/Sulfur for Lithium-Sulfur Cells.

Tzu-Ming Hung1, Cheng-Che Wu1, Chung-Chan Hung2

  • 1Department of Materials Science and Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan.

Nanomaterials (Basel, Switzerland)
|February 23, 2024
PubMed
Summary

Researchers developed a novel cement/sulfur cathode composite for lithium-sulfur batteries. This material enhances electrochemical utilization and stability, offering a cost-effective solution for next-generation energy storage.

Keywords:
cementelectrochemistrylithium–sulfur batterysulfursustainable energy

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium-sulfur batteries offer high theoretical capacity but suffer from poor electrochemical utilization and stability.
  • Existing materials lack tailored configurations to enhance performance.
  • Cost-effectiveness and low toxicity are key drivers for next-generation energy storage.

Purpose of the Study:

  • To introduce a novel cement/sulfur composite for lithium-sulfur battery cathodes.
  • To investigate the potential of cement's polysulfide adsorption for battery stability.
  • To enhance cell fabrication parameters and overall battery performance.

Main Methods:

  • Preparation of a cement/sulfur energy storage material.
  • Fabrication of a cathode composite with high sulfur content (80 wt%) and loading (6.4 mg cm⁻²).
  • Electrochemical testing to evaluate charge capacity, rate performance, and cycling stability.

Main Results:

  • The cement/sulfur cathode composite demonstrated a high charge storage capacity of 1189 mA∙h g⁻¹.
  • Excellent rate performance was observed across C/20 to C/3 rates.
  • The cell exhibited an extended lifespan of 200 cycles with high active-material retention and utilization.
  • Achieved areal capacities from 4.59 to 7.61 mA∙h cm⁻², energy densities from 9.63 to 15.98 mW∙h cm⁻², and gravimetric capacities of 573–951 mA∙h g⁻¹.

Conclusions:

  • Cement, despite low conductivity, offers robust polysulfide adsorption beneficial for Li-S battery cathodes.
  • The cement/sulfur cathode composite enhances fabrication feasibility and cell performance.
  • This study pioneers a new approach using nonporous cement for advanced lithium-sulfur battery development.