Route to sustainable lithium-sulfur batteries with high practical capacity through a fluorine free polysulfide catholyte and self-standing Carbon Nanofiber membranes
Journal article, 2017

We report on a new strategy to improve the capacity, reduce the manufacturing costs and increase the sustainability of Lithium-Sulfur (LiS) batteries. It is based on a semi-liquid cathode composed of a Li2S8 polysulphide catholyte and a binder-free carbon nanofiber membrane with tailored morphology. The polysulphides in the catholyte have the dual role of active material and providing Li+-conduction, i.e. no traditional Li-salt is used in this cell. The cell is able to deliver an areal capacity as high as 7 mAh cm(-2), twice than that of commercial Lithium-ion batteries (LiBs) and 2-4 times higher than that of state-of-the-art LiS cells. In addition, the battery concept has an improved sustainability from a material point of view by being mainly based on sulfur and carbon and being completely fluorine-free, no fluorinated salt or binders are used, and has potential for upscaling and competitive price. The combination of these properties makes the semi-liquid LiS cell here reported a very promising new concept for practical large-scale energy storage applications.

technology

electrolytes

electrodes

performance

power

cells

energy-storage

stability

cathode materials

Author

Du Hyun Lim

Chalmers, Physics, Condensed Matter Physics

Marco Agostini

Chalmers, Physics, Condensed Matter Physics

Florian Nitze

Chalmers, Physics

J. Manuel

Gyeongsang National University

J. H. Ahn

Gyeongsang National University

Aleksandar Matic

Chalmers, Physics, Condensed Matter Physics

Scientific Reports

2045-2322 (ISSN)

Vol. 7 1 Article no. 6327 - 6327

Subject Categories

Condensed Matter Physics

DOI

10.1038/s41598-017-06593-2

More information

Created

10/8/2017