Free-standing, high Li-ion conducting hybrid PAN/PVdF/LiClO 4 /Li 0.5 La 0.5 TiO 3 nanocomposite solid polymer electroly
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ORIGINAL PAPER
Free-standing, high Li-ion conducting hybrid PAN/PVdF/LiClO4/Li0.5La0.5TiO3 nanocomposite solid polymer electrolytes for all-solid-state batteries P. Sivaraj 1,2 & K. P. Abhilash 3 & B. Nalini 4 & P. Perumal 2 & P. Christopher Selvin 2 Received: 12 June 2020 / Revised: 21 September 2020 / Accepted: 1 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The free-standing PAN/PVdF/LiClO4/Li0.5La0.5TiO3 nanocomposite solid polymer electrolytes have been prepared by solution casting technique. The thermal stability of composite solid polymer electrolytes is evaluated by TG/DSC analysis, which reveals that the filler incorporated composite samples exhibit high thermal stability up to 500 °C. The XRD analysis demonstrated that the Li0.5La0.5TiO3 nanoparticles significantly reduced the crystallinity of the hybrid PAN/PVdF/LiClO4 polymer films. The FTIR spectra of PAN/PVdF/LiClO4/Li0.5La0.5TiO3 composites show the vibrational band of –CN stretching, CF2 asymmetric stretching, and Ti-O-La stretching which confirmed the complexation between polymer host matrices and Li0.5La0.5TiO3 nanoparticles. The 10 wt% Li0.5La0.5TiO3 nanoparticles embedded PAN/PVdF/LiClO4 solid polymer electrolyte possessed an excellent ionic conductivity of 1.43 × 10−3 S cm−1 at room temperature, which is far better than the filler-free samples (~ 10−5 S cm−1). The incorporation of Li0.5La0.5TiO3 nanoparticles into the PAN/PVdF/LiClO4 polymer electrolyte improves the concentration of free mobile lithium ions and develops Li-ion conduction channels within the crystalline framework. The PAN/ PVdF/LiClO4/Li0.5La0.5TiO3 (10 wt%) composite electrolyte exhibited high thermal stability, good discharge capacities of 122, 105, 94, and 80 mAh g−1 at 0.1, 0.5, 1, and 2C rates, and good cycling stability. Keywords Polymers . Nanocomposites . Electrical properties . Energy storage . All-solid-state batteries
Introduction All-solid-state polymer batteries (ASSPBs) as an emerging battery chemistry over different energy storage devices are attractive candidate in energy storage systems and portable electronic applications due to their high flexibility, light weight, good energy/power density, and thermal stability [1,
* P. Christopher Selvin [email protected] 1
Materials Research Centre, Department of Physics, N.G.M. College, Pollachi, Coimbatore, Tamil Nadu 642 001, India
2
Luminescence and Solid State Ionics Laboratory, Department of Physics, Bharathiar University, Coimbatore, Tamil Nadu 641046, India
3
Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China
4
Department of Physics, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore, Tamil Nadu 641 043, India
2]. The liquid-type organic electrolytes have been used as electrolyte material in the conventional lithium-ion batteries (LIBs) [3]. The liquid electrolytes present several challenging issues, such as the formation of Li dendrite, uncontrolled side chemical reactio
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