Sulfur Battery Cells Concept is Now Fabricated and Ready to be Tested
As the depletion of fossil fuels and environmental nuisance are on the rise, rechargeable batteries are making steady strides into the consecration of a greener energy century. So far, lithium-ion batteries (LIBs) have successfully enabled the widespread use of portable electronic devices and power tools. The need for mid-to-large scale LIBs is soaring in recent years due to their increasing penetration into electric vehicles and as stationary energy storage systems (ESS) for the electric grid application. In support of the Energy Security Grand Challenge, the Energy Storage Group at Qatar Environment and Energy Research Institute (QEERI) has been tasked with the valorization of the natural resources in Qatar, namely sulfur, sodium, silicon and the petrochemical byproducts, through the use of the materials that are produced by the local stakeholders to support the energy diversification initiative in Qatar. In this context, the group is evaluating the performance of high-energy density batteries comprising sulfur which one of the major byproducts of the gas and oil industries in Qatar.
The Energy Storage Group, in collaboration with Hanyang University in Seoul South Korea, has successfully fabricated prototype sulfur cells based on a concept that is developed in an Intellectual property that belongs to QEERI. These prototype cells were recently delivered to QEERI for further testing, analysis and diagnostics.
A rechargeable lithium sulfur battery is based on the reversible redox process between sulfur and lithium via the electrochemical reaction [S + 2 Li+ + 2 ē ↔ Li2S], and the advantage is that the sulfur cathode offers much superior capacity (1672 mAh.g-1) compared to all Li-ion battery cathodes (274 mAh.g-1), and is abundant, low cost and nontoxic.