公开(公告)号：US20230282944A1

公开(公告)日：2023-09-07

申请号：US18006404

申请日：2021-07-23

Applicant: MONASH UNIVERSITY

Inventor： Petar JOVANOVIC ,  Mahdokht SHAIBANI ,  Mainak MAJUMDER

IPC: H01M50/497 ,  H01M50/403 ,  H01M50/417 ,  B82Y30/00 ,  B82Y40/00 ,  H01M10/052

CPC classification number: H01M50/497 ,  H01M50/403 ,  H01M50/417 ,  B82Y30/00 ,  B82Y40/00 ,  H01M10/052 ,  H01M2300/0082 ,  H01M2300/0094

Abstract: A method of making a polyelectrolyte complex membrane separator for a Lithium-Sulfur battery to support lean electrolyte operation, comprising the steps of: forming polyelectrolyte complex nanoparticles by the addition of polyethylenimine (PEI) to tannic acid (TA); adding bovine serum albumin (BSA); purifying the nanoparticles; re-dispersing the nanoparticles in water to form a nanoparticle suspension; and dipcoating a polyolefin membrane in the nanoparticle suspension.

公开(公告)号：US20210399277A1

公开(公告)日：2021-12-23

申请号：US17292736

申请日：2019-11-10

Applicant: Monash University

Inventor： Mahdokht SHAIBANI ,  Mainak MAJUMDER

IPC: H01M4/136 ,  H01M4/1397 ,  H01M4/62 ,  H01M4/36 ,  H01M10/052

Abstract: A method of producing Sulfur cathodes for Li—S batteries utilising dry mixing of constituents (sulphur, carbon and binder) or semi-dry mixing. The resultant structure binds the neighbouring particles without covering them, i.e. by attaching a few parts of a particle to other neighbouring particles provides a solution for the successful cycling of thick and ultra-thick sulfur cathodes. Such an approach provides a robust thick cathode where particles are strongly bonded with minimal surface coverage with the polymer providing sufficient room to expand during lithiation. Bridging bonds are formed within the cathodes.

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.