Energy for the future: New sustainable cathode material for its application on Lithium/Sulfur batteries
Energy storage remains a main issue closely linked to the technological development. Energy demand and storage capacity keep increasing and challenging current technical solutions, which need to be improved to satisfy future needs. This invention gives an environmental friendly answer to these issues by suggesting a new and inexpensive sulphur-based polymer as LiS batteries cathode.
Batteries have become one of the fundamental parts of any new electrical appliance. In the current scenario, where electrical devices constantly increase their energy demand, the need for more efficient,
sustainable and high-capacity batteries is obvious.
Lithium/Sulfur (LiS) batteries are the most promising next generation alternative to the conventional Lithium-Ion batteries, which are limited by their non-extendible energy density.
High energy density, low costs and low toxicity are important advantages generally linked to LiS batteries.
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The production of this pioneering material relies on highly unsaturated vegetable oils, which are available in large quantities and variation, adding flexibility to the synthesis and thereby allowing for material property adjustments. The synthesis is performed using reproducible conditions.
Double bonds in vegetable oils are the reactive point to which sulfur can bind. A cross-linked polymeric network is formed, that accommodates small sulfur particles, thereby preventing the diffusion of soluble reduction products. This results in an extended lifespan of the cathode and increases the efficiency of the battery.
The cross-linked, sulfur based composite material contains a high sulfur percentage (up to 80 wt%). This polymer can be used, without further treatment, as cathode in LiS batteries.
Our solution allows efficiently overcoming some of the typical drawbacks of LiS batteries, as the short lifespan, limited efficiency by loading and self-discharge.
Our technology presents an innovative material for the fabrication of battery cathodes based on vegetable oil and elemental sulfur. It represents the first 100% sustainable cathode material for LiS batteries!
The solvent-free synthesis involves two non-toxic and affordable reactants and is scalable to produce large volumes, according to the potential applications.
Our technology convinces through important added strengths:
- Simple, sustainable and cost-effective production
- Prevention of Shuttle Effect
- High sulfur content
- Higher cycle stability
- Lithium/Sulfur batteries
- Cathode materials
- Sustainable batteries
- R&D Cooperation
- Patent rights transfer
Publikationen & Verweise
Hoefling, A; Lee, YJ; Theato, P. "Sulfur-Based Polymer Composites from Vegetable Oils and Elemental Sulfur: A Sustainable Active Material for Li-S Batteries" Macromol. Chem. Phys. 2015, 00, 1-8.
Weitere Information zum Herunterladen
- 583 Ki
- PCT PCT/DE2016/200399 anhängig
StichworteLiS batteries, Efficient cathode, Vegetable oil, Sulphur, Polymer, Reduction of Shuttle Effect, High sulphur content