公开(公告)号：US20250087691A1

公开(公告)日：2025-03-13

申请号：US18580654

申请日：2022-07-18

Applicant: Monash University

Inventor： Yingyi HUANG ,  Mahdokht SHAIBANI ,  Matthew HILL ,  Mainak MAJUMDER

IPC: H01M4/62 ,  H01M10/0525

Abstract: Stability to long term charge and discharge cycles is the most formidable challenge for Lithium-Sulfur batteries. Therefore, a more holistic design of a durable cathode with minimal polysulfide escape to mitigate the corrosion of the lithium anode is required. A saccharide-based binder system—the monosaccharide (glucose) component, on account of being a strong reducing agent has a unique capacity for the regulation of polysulfide thereby dramatically enhancing the functionality of a polysaccharide (carboxymethyl cellulose) binder system. The two-component binder system promotes the formation of viscoelastic filaments during casting which endows sulfur cathode a desired web-like microstructure. The combination of these effects leads to 97% sulfur utilisation with an ultra-long cycle life of 1000 cycles (9 months) and a high capacity retention (around 700 mAhg−1 after 1000 cycles). A pouch cell prototype with a capacity of 1200 mAhg−1 demonstrates a promising transition from laboratory to manufacturing options.