Das, Mononita and Das, Pradip Sekhar and Pramanik, Nimai Chand and Basu, Rajendra Nath and Raja, Mir Wasim (2023) Advanced Sustainable Trilayer Cellulosic ``Paper Separator'' Functionalized with Nano-BaTiO3 for Applications in Li-Ion Batteries and Supercapacitors. ACS Omega, 8 (23). pp. 21315-21331. ISSN 2470-1343

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In the quest of developing a sustainable, low-cost andimprovedseparator membrane for application in energy storage devices likelithium-ion batteries (LIBs) and supercapacitors (SCs), here we fabricateda trilayer cellulose-based paper separator engineered with nano-BaTiO3 powder. A scalable fabrication process of the paper separatorwas designed step-by-step by sizing with poly-(vinylidene fluoride)(PVDF), thereafter impregnating nano-BaTiO3 in the interlayerusing water-soluble styrene butadiene rubber (SBR) as the binder andfinally laminating the ceramic layer with a low-concentration SBRsolution. The fabricated separators showed excellent electrolyte wettability(216-270%), quicker electrolyte saturation, increased mechanicalstrength (43.96-50.15 MPa), and zero-dimensional shrinkageup to 200 degrees C. The electrochemical cell comprising graphite|paperseparator|LiFePO4 showed comparable electrochemical performancesin terms of capacity retention at different current densities (0.05-0.8mA/cm(2)) and long-term cycleability (300 cycles) with coulombicefficiency >96%. The in-cell chemical stability as tested for 8weeksrevealed a nominal change in bulk resistivity with no significantmorphological changes. The vertical burning test as performed on apaper separator showed excellent flame-retardant property, a requiredsafety feature for separator materials. To examine the multidevicecompatibility, the paper separator was tested in supercapacitors,delivering a comparable performance to that of a commercial separator.The developed paper separator was also found to be compatible withmost of the commercial cathode materials such as LiFePO4, LiMn2O4, and NCM111.

Item Type: Article
Subjects: Electronics
Divisions: Fuel Cell and Battery
Depositing User: Bidhan Chaudhuri
Date Deposited: 13 Oct 2023 07:22
Last Modified: 13 Oct 2023 07:22
URI: http://cgcri.csircentral.net/id/eprint/5600

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