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Composite Of Carbon Encapsulated Sulfur for Lithium Sulfur Battery Application

Technology Overview

The lithium-sulfur batteries possess a theoretical specific capacity which is ~10 times as high as lithium-ion batteries. In the past years, much research on Lithium-Sulfur batteries have been carried out to prevent the discharged products (polysulfides) from diffusing to the anode. The dissolution of polysulfides can form redox shuttle, causing serious self-discharge. The followed precipitation on the anode also leads to fast capacity fading during cycling. In order to overcome these problems, it is essential to develop an effective host which retains both sulfur and polysulfides during charge and discharge processes.

The developed technology is related to a new composite material which can be used as cathode material in rechargerable lithium sulfure batteries. The technology provider is seeking for industry collaboration in further development of the technology as well as technology licensing opportunities.

Technology Features & Specifications

The invention relates to a composite consisting of sulfur nanoparticles encapsulated in hollow carbon spheres in yolk-shell structure. Such composite material is proven useful as cathode material in rechargeable lithium-sulfur batteries.

Advantages of this technology;

  • Exhibit good morphology control, uniform size and shape
  • Sufficient free volume to accomodate the expansion of dulfur during discharge process
  • Effective carbon coating to prevent excessive polysulfide leakage
  • Exhibit high initial capacities and excellent cycling performance

Potential Applications

Potential application would be as cathode materials in rechargeable lithium-sulfur batteries for battery materials manufacturers and battery manufacturers.

Customer Benefits

  • Improved performance of Lithium-sulfur battery 

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