LISSEN - Lithium Sulfur Superbattery Exploiting Nanotechnology (February 2015)


Main goal

The project aims to develop a proof of concept battery, which can be scaled-up to industrial needs.

Battery of study

Lithium-Sulfur (very high energy density, 3730 Wh/kgsulfur, low cost, S: 30 US$/ton; however many issues so far limiting the practical relevance).

LISSEN approaches to address the main issues:

- Solubility of polysulphides: development of selected multi-component, ionic liquid–based electrolyte

Slow kinetics of the sulfur electrode: use of a new nanomorphology, involving homogeneous dispersion of low-size sulfur (or Li2S ) particles in hard carbon spherules

Safety concern: replacement of the reactive lithium metal electrode with a Si-C nano composite either pristine (for Li2S cathode) or lithiated (for S cathode)

LISSEN achievements:

- Preparation of both anode (Si-C) and cathode (S-C) materials has been scaled-up to several g-sized batches, by developing reproducible synthesis procedure

An advanced polymer electrolyte, combining poly(ethylene oxide) matrix with ionic liquid-based, polysulfide-added solutions, has been optimized to effectively control cathode dissolution

Electrode preparation procedures adopting the originally developed materials have been addressed and full Li-ion sulfur cells have been realized, reaching scaled configurations with a targeted capacity of 1 Ah.