|About this Abstract
||MS&T22: Materials Science & Technology
||Energy Materials for Sustainable Development
||Molecular Precursors for Li2S as Cathode Material for Sustainable Energy Storage
||Veronika Brune, Sanjay Mathur, Michael Wilhelm
|On-Site Speaker (Planned)
Large-scale energy storage will play a key role in future energy technologies for sustainable energy supply.
Among the innumerable energy-storage technologies, lithium-sulfur batteries has emerged as a promising alternative, caused by highly abundant sulfur, its economically price and non-toxicity. Recently, Li2S has received much attention as an electrochemically active cathode material in lithium-sulfur batteries because a higher level of safety can be ensured.
Using synthesized compounds to combine lithium and sulfur already at a molecular level shows the advantages of preformed bonds and the opportunity of shielding and protecting the sensitive Li-S unit against oxidation by introducing a suitable ligand. Good solubility in various solvents enables simple handling and an innovative preoperational fabrication carbon embedded Li2S 1D fibers by electrospinning processes.
Calcination of electrospun fibers provides Li2S loaded fiber mats, which shows capacity retention of 73% over 100 cycles and a capacity of about 400 mAh g–1 at 1 C.