Fabrication and electrochemical characterization of lithium metal battery using IL-based polymer electrolyte and Ni-rich
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ORIGINAL PAPER
Fabrication and electrochemical characterization of lithium metal battery using IL-based polymer electrolyte and Ni-rich NCA cathode Dipika Meghnani 1 & Himani Gupta 1 & Shishir Kumar Singh 1 & Nitin Srivastava 1 & Raghvendra Mishra 1 & Rupesh Kumar Tiwari 1 & Anupam Patel 1 & Anurag Tiwari 1 & Rajendra Kumar Singh 1 Received: 17 February 2020 / Revised: 7 May 2020 / Accepted: 10 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Electrolytes with high Li+ transference number and good electrochemical stability are urgently needed for high-energy-density Li battery. In this paper, we present newly synthesized ionic liquid (IL)-based polymer electrolyte using polymer poly(ethylene oxide) (PEO), salt lithium bis(fluorosulfonly)imide (LiFSI), and IL 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide (BMPyTFSI) by solution cast technique. They show high Li+ transference number and good electrochemical and thermal stability. Also, nickel-rich layered cathode material LiNi0.90Co0.05Al0.05O2 (NCA) with good electrochemical performance for lithium secondary battery is successfully synthesized by Co-precipitation method. Using the optimized polymer electrolyte and NCA cathode, Li cell is prepared which shows initial discharge capacity of ~ 137 mAh g−1 at 0.1 C-rate and good Coulombic efficiency ~96.0% upto 125 cycles. Keyword Ni-rich NCA cathode . Ionic liquid . Li battery . Polymer electrolyte
Introduction Since the end of the twentieth century, energy crises have become a critical issue for the development of science and technology as well as sustainable development of our society. Also, renewable energy sources such as solar and wind energy sources are intermittent in nature; therefore, to get continuous power supply, high-capacity/energy density rechargeable batteries are in demand [1]. Among these batteries, Li batteries are gaining much attention for low-emission hybrid electric vehicles (HEVs) and emission-free electric vehicles (BEVs) because of their high-energy and power density along with longer cycle life [1, 2]. However, for considerable improvement in energy density, safety, and cost, it is necessary to renew the Li battery chemistry which Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11581-020-03656-9) contains supplementary material, which is available to authorized users. * Rajendra Kumar Singh [email protected]; [email protected] 1
Ionic Liquid and Solid State Ionics Lab, Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
involves mainly three components as anode, electrolyte, and cathode. Among these components, cathode plays a major role to determine the electrochemical performance of Li battery; therefore, to improve the capacity, cyclability, and energy density of battery, discovery of novel cathode materials is in progress. For this purpose, cathode materials having high capacity and energy density, long cycle life, and thermal and stru
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