Tailoring Commercially Available Raw Materials for Lithium-Sulfur Batteries with Superior Performance and Enhanced Shelf Life
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Physical activation with CO2 is used to modify the micro-, meso-, and macropore system of commercial, highly branched carbon black (CB) particles. Due to the increased total porosity and high surface area of 1747m2g-1 the completeness of sulfur infiltration in intra-particle pores of CB is promoted. This is found to not only minimize sulfur agglomeration on the particle surface but also reduce self-discharge, that is, polysulfide leakage. Wrapping the CB/sulfur composite with a poly(ethylene oxide)/poly(vinylpyrrolidone) film further triggers a synergy allowing for faster sulfur conversion with increased reversibility. Thus, an initial capacity of 1238mAhg-1S at C/10 and a stable capacity of 1015mAhg-1S after 50cycles were obtained, combined with a superior rate capability up to 2C (≈7.5mAcm-2) and extremely slow self-discharge over 100days (open-circuit voltage>2.30V).
Details
Originalsprache | Englisch |
---|---|
Seiten (von - bis) | 1007-1013 |
Seitenumfang | 7 |
Fachzeitschrift | Energy technology |
Jahrgang | 3 |
Ausgabenummer | 10 |
Publikationsstatus | Veröffentlicht - 5 Aug. 2015 |
Peer-Review-Status | Ja |
Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- Carbon black, Carbon dioxide, Lithium-sulfur batteries, Polymers, Porous materials