The Role of Cellulose Based Separator in Lithium Sulfur Batteries

Abstract

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.

Tubular CoFeP@CN as a Mott–Schottky Catalyst with Multiple Adsorption Sites for Robust Lithium−Sulfur Batteries

“…[46] The small additional band in the CoFeP@CN-LiPS sample at 397.8 eV is attributed to NLi bond formation during the adsorption process. [47,48] These results were consistent with previous reports demonstrating that LiPS could anchor on active nitrogen sites through dipoledipole interactions. This Li-N chemical interaction certainly contributes to inhibiting the shuttling effect.…”

Boron Nitride Nanotube-Based Separator for High-Performance Lithium-Sulfur Batteries

“…A comparison of the energy density at 100th cycle with those of other separators utilized in LSBs is presented in Figure 5e. Such a high density is due to the high retention of specific capacity at 100th cycle when using p−BNNT−PP−1.0 as a separator [32][33][34][35][36][37][38].…”

Material design and structure optimization for rechargeable lithium-sulfur batteries

“…The utilization of abundant, environmentally friendly, and biodegradable natural polymers, such as nanocellulose, bacterial cellulose, and chitin, for the fabrication of separators, has aroused much research interest. [186][187][188][189] Due to the existence of periodically arranged polysaccharide chains on cellulose nanofibers (CNFs), the separators based on CNFs usually exhibit enhanced wettability, permeability, thermal stability, and mechanical properties. Recently, a porous cellulose-based membrane derived from a facial mask has been demonstrated to be a high-performance separator in Li-S batteries.…”