Improved electrochemical performance of EMIMFSI ionic liquid based gel polymer electrolyte with temperature for rechargeable lithium battery

Singh, Shri; Shalu, .; Balo, Liton; Gupta, Himani; Singh, Varun Kumar; Tripathi, Amita; Verma, Yogendra Lal

doi:10.1016/j.energy.2018.03.024

Cited by 67 publications

(38 citation statements)

References 59 publications

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“…To prepare a stable hybrid interlayer we have screened ILs previously showing good performance in Li‐battery applications. [ 29–32 ] These are based on three cations, 1‐butyl‐1‐methylpyrrolidinium (PYR14 + ), 1‐butyl‐1‐methylpiperidinium (PP14 + ) and 1‐butyl‐3‐methylimidazolium (BMIM + ), and two anions, bis(trifluoromethanesulfonyl)imide (TFSI − ) and bis(fluorosulfonyl)imide (FSI − ), combined in four ILs named PYR14‐TFSI, PYR14‐FSI, BMIM‐FSI and PP14‐FSI. The chemical structures of cations and anions are shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Xiong

Liu

Jankowski

et al. 2020

Adv Funct Materials

124

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NASCION-type Li conductors have great potential to bring high capacity solid-state batteries to realization, related to its properties such as high ionic conductivity, stability under ambient conditions, wide electrochemical stability window, and inexpensive production. However, their chemical and thermal instability toward metallic lithium (Li) has severely hindered attempts to utilize Li as anode material in NASCION-based battery systems. In this work, it is shown how a tailored multifunctional interlayer between the solid electrolyte and Li anode can successfully address the interfacial issues. This interlayer is designed by creating a quasi-solid-state paste in which the functionalities of LAGP (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 ) nanoparticles and an ionic liquid (IL) electrolyte are combined. In a solid-sate cell, the LAGP-IL interlayer separates the Li metal from bulk LAGP and creates a chemically stable interface with low resistance (≈5 Ω cm 2 ) and efficiently prevents thermal runaway at elevated temperatures (300 °C). Solid-state cells designed with the interlayer can be operated at high current densities, 1 mA cm −2 , and enable high rate capability with high safety. Here developed strategy provides a generic path to design interlayers for solid-state Li metal batteries.

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Section: Resultsmentioning

confidence: 99%

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Xiong

Liu

Jankowski

et al. 2020

Adv Funct Materials

124

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“…In the figure, the positive voltage plateau indicates Li stripping while the negative plateau refers to Li plating. [45] The figure also illustrates that at the first 45 hrs the overpotential for both the cells shows stable overpotential of 40 mV and 30 mV for GPE and cGPE-1 respectively with no sign of increase. However, the overpotential for GPE gradually started to increase after 45 hrs of charge-discharge while no significant increase observed for cGPE-1 shown in the inset figure.…”

Section: Resultsmentioning

confidence: 77%

“…Figure compares the overpotential of both the systems up to 500 hrs where one complete charge‐discharge cycle is 2 hrs. In the figure, the positive voltage plateau indicates Li stripping while the negative plateau refers to Li plating . The figure also illustrates that at the first 45 hrs the overpotential for both the cells shows stable overpotential of 40 mV and 30 mV for GPE and cGPE‐1 respectively with no sign of increase.…”

Section: Resultsmentioning

confidence: 88%

“…Figure (a) compares the cyclic stability of the GPE and cGPE‐1 at C/2 rate for 300 cycles at room temperature (22 °C). From the figure it is seen that the initial discharge capacity of the GPE and cGPE‐1 are 155.4 and 160.42 mAh g −1 respectively and after an initial increase of capacity which is due to the SEI formation, the maximum discharge capacity of 160.81 and 163.33 mAh g −1 are achieved at the 14 th cycle maintaining ≥99 % coulombic efficiency. The batteries with the cGPE‐1 containing electrolyte maintained a stable discharge capacity up to the 70 th cycle while for GPE the capacity started to drop slightly after the 40th cycles.…”

Section: Resultsmentioning

confidence: 96%

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Poly(Ionic Liquid)‐Based Composite Gel Electrolyte for Lithium Batteries

et al. 2019

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Composite gel polymer electrolyte (cGPE) containing a poly(ionic liquid) (PIL) polymer, imidazolium cation‐based ionic liquid as a solvent, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) as salt, and glass fillers with various concentrations have been developed and tested in lithium batteries. cGPEs with 1 wt% glass filler shows the highest ionic conductivity and lithium‐ion transference number with 25 % and 18.18 % improvement compared to gel polymer electrolyte (GPE), respectively. Raman results show that the improvement is due to the improved ion‐pair dissociation of LiTFSI, which causes improvement of Li+ mobility. Cyclic charge‐discharge studies using binder‐free LiFePO4/C cathode and lithium anode for 100 cycles at various C‐rates and at a fixed rate of C/2 for 300 cycles show superior performances compared to other cGPEs and GPE. Electrochemical impedance spectroscopy and scanning electron microscopy confirm uniform deposition of reaction products on the cathode surface, which improves the charge‐transfer reactions and hence improves cyclic performances for cGPE‐1 cells with increasing cycles.

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“…The above results suggest weak Li + and TFSIinteractions which free up Li + by inducing ion pair dissociation in the cGPE-1 which results in high ion conductivity and mobility [207]. respectively and after an initial increase of capacity which is due to the SEI formation [208], the maximum discharge capacity of 160.81 and 163.33 mAh.g -1 are achieved at the 14 th cycle. The batteries with the cGPE-1 containing electrolyte maintained a stable discharge capacity up to the 70 th cycle while for GPE the capacity started to drop slightly after the 40 th cycles.…”

Section: Resultsmentioning

confidence: 79%

Poly (Ionic Liquid) Based Electrolyte for Lithium Battery Application

Safa¹

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guidance, encouragement, and support throughout my Ph.D. research. I would also like to thank Professor Chunlei Wang for her collaboration and insightful suggestions as my committee member during my Ph.D. work. I would also thank my other committee members Dr. Norman Munroe, Dr. Yu Zhong and Dr. Irene Calizo for their willingness to be on my committee and their invaluable support and encouragement. I sincerely thank my past and present group members Amir, Neha, Ata, Elnaz, Kamran, and Marcus and also Ebenezer, Yong, and Amin from Dr. Wang's group for their invaluable help and support. I would also like to appreciate the help from the staff of Advanced Materials Engineering Research Institute (AMERI) at FIU especially Dr. Alexander Franco for his continuous support during my stay. Finally, I acknowledge the Mechanical and Materials Engineering (MME) Department at FIU for supporting me through Graduate Assistantship and also the University Graduate School (UGS) at FIU for supporting me through Dissertation Year Fellowship (DYF). vi

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Improved electrochemical performance of EMIMFSI ionic liquid based gel polymer electrolyte with temperature for rechargeable lithium battery

Cited by 67 publications

References 59 publications

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Poly(Ionic Liquid)‐Based Composite Gel Electrolyte for Lithium Batteries

Poly (Ionic Liquid) Based Electrolyte for Lithium Battery Application

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