Electrospun derived polymer-garnet composite quasi solid state electrolyte with low interface resistance for lithium metal batteries

Arunkumar Rajamani, Thamayanthi Panneerselvam, Ramaswamy Murugan and Arun Prasath Ramaswamy

Energy, 2023, vol. 263, issue PE

Abstract: Polymer garnet composite electrolyte is a promising stable electrolyte to replace the hazardous/unstable liquid electrolytes in lithium-ion batteries due to their synergistic advantage of solid organic polymer electrolytes and inorganic ceramic electrolytes. Herein, we report polymer blend-based garnet composite quasi solid state electrospun electrolytes for lithium metal batteries. To be specific, Ta doped lithium lanthanum zirconium oxide, Li6·4La3Ta0·6Zr1·4O12 (LLZTO) incorporated with poly (vinyldine fluoride-hexafluro propylene) (PVdF-HFP)/poly butyl methacrylate (PBMA) electrospun membrane as the composite electrolyte, named as Ta-ESM and similarly, LLZTO free electrolyte named as ESM. The inclusion of LLZTO into the polymer matrix enhances the room temperature ionic conductivity from 9.924 × 10−4 (ESM) to 4.858 × 10−3 S cm−1 (Ta-ESM) along with lithium-ion transference number (0.61). Furthermore, polymer garnet composite electrolytes (Ta-ESM) restraint the growth of lithium dendrites, confirmed by the time-dependent impedance method and galvanostatic cycling technique. We have demonstrated the charge-discharge behaviour of lithium-metal battery using LiFePO4 cathode and lithium metal anode using Ta-ESM electrolyte, delivering 178 mA h g−1 at 0.1C and cyclability of 100 cycles. The high electrolyte uptake (582%) and porosity (64.1%) in Ta-ESM help achieve fast ionic migration and thus attain stable cycling.

Keywords: Garnet composites; Poly(butyl methacrylate); Electrospun membrane; Lithium-ion batteries; Interfacial stability (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pe:s0360544222029449

DOI: 10.1016/j.energy.2022.126058

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