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    METHOD OF PRODUCING THICK SULPHUR CATHODES FOR LI-S BATTERIES
    1.
    发明申请
    METHOD OF PRODUCING THICK SULPHUR CATHODES FOR LI-S BATTERIES 有权

    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.

    SACCHARIDE-BASED BINDER SYSTEM FOR ULTRA-LONG LIFE AND HIGH CAPACITY LITHIUM-SULFUR BATTERY
    2.
    发明申请
    SACCHARIDE-BASED BINDER SYSTEM FOR ULTRA-LONG LIFE AND HIGH CAPACITY LITHIUM-SULFUR BATTERY 有权

    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.

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