The Role of Cellulose Based Separator in Lithium Sulfur Batteries

Nejc Pavlin (1) , Silvo Hribernik , Gregor Kapun (1) , Sara Drvaric Talian (1) , Christian Njel (2, 3) , Rémi Dedryvère (2, 3) , Robert Dominko (1)

1 KI - National Institute of Chemistry [Llubljana]
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
3 ALISTORE-ERI - Advanced Lithium Energy Storage Systems - ALISTORE-ERI

In this work, abundant and environmentally friendly nano-fibrillated (NFC) cellulose is used for fabrication of porous separator membranes according to the procedure adopted from papermaking industry. As-prepared NFC separators were characterized in terms of thickness, porosity, wettability, electrochemical stability and electrochemical performance in lithium-sulfur and Li-symmetrical pouch cells and compared to a commercial Celgard 2320 separator membrane. Results demonstrated that morphology and electrochemical performance of NFC separator outperforms the conventional polyolefin separator. Due to exceptional interplay between lithium metal and cellulose, this research provides a self-standing NFC separator that can be used besides the lithium-sulfur also in other lithium metal battery configurations.

Mots clés: Lithium sulfur batteries; Electrochemical stabilities; Self standings; Papermaking industry; Lithium sulfurs; Lithium metals

Domaines: Autre; Polymères

Nejc Pavlin, Silvo Hribernik, Gregor Kapun, Sara Drvaric Talian, Christian Njel, et al.. The Role of Cellulose Based Separator in Lithium Sulfur Batteries. Journal of The Electrochemical Society, 2019, 166 (3), pp.A5237-A5243. ⟨10.1149/2.0401903jes⟩. ⟨hal-02086023⟩