Electrochimica Acta, volume 401, pages 139470
Safe gel polymer electrolytes for high voltage Li-batteries
Ruggero Poiana
1
,
Ernestino Lufrano
2
,
Akiko Tsurumaki
1
,
Cataldo Simari
2
,
Isabella Nicotera
2
,
Maria Assunta Navarra
1
Publication type: Journal Article
Publication date: 2022-01-01
General Chemical Engineering
Electrochemistry
Abstract
• Gel polymer electrolytes (GPEs) are synthesized with PVdF-HFP, LP30 and [Py 14 ]PF 6 . • Thermal and mechanical stabilities of the GPEs are improved by adding [Py 14 ]PF 6 . • Using EIS and PFG-NMR, ionic conductivity of GPEs is found to be above 10 −3 S/cm. • Li|GPE|LNMO cells maintain their capacity above 110 mAh/g throughout 150 cycles. • By adding [Py 14 ]PF 6 , the coulombic efficiency is kept above 99% during battery cycling. Gel polymer electrolytes (GPEs), based on poly(vinylidene fluoride- co -hexafluoropropylene) (PVdF-HFP), 1 M LiPF 6 in ethylene carbonate/dimethyl carbonate (EC/DMC), so called LP30, and 1‑butyl‑1-methylpyrrolidinium hexafluorophosphate ([P y 14 ]PF 6 ), have been developed to improve inherent safety of the electrolyte for high voltage lithium batteries. Dry PVdF-HFP membranes, prepared with EC/DMC, were soaked in LP30 in addition to its mixtures with 30 wt% and 50 wt% [Py 14 ]PF 6 to obtain GPEs. Non-flammable character and mechanical stability enhanced via physical crosslinks of the GPEs are demonstrated with flammability tests and rheological measurements, respectively. Lithium ion conduction property in the GPEs is evaluated by means of both electrochemical impedance spectroscopy and NMR spectroscopy (Pulsed Field Gradient-PFG and relaxation time). Galvanostatic charge and discharge cycles of lithium metal batteries having LiNi 0.5 Mn 1.5 O 4 as a high voltage cathode demonstrate improved electrochemical performance with coulombic efficiency above 99% and high specific capacity above 110 mAh g − 1 at C/5 throughout 150 cycles, when the GPE containing LP30 with 30 wt% [Py 14 ]PF 6 is used. The capacity retention is sufficiently high compared to the GPE without [Py 14 ]PF 6 , confirming that the IL is a highly promising additive for improving battery life.
Top-30
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Poiana R. et al. Safe gel polymer electrolytes for high voltage Li-batteries // Electrochimica Acta. 2022. Vol. 401. p. 139470.
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Poiana R., Lufrano E., Tsurumaki A., Simari C., Nicotera I., Navarra M. A. Safe gel polymer electrolytes for high voltage Li-batteries // Electrochimica Acta. 2022. Vol. 401. p. 139470.
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TY - JOUR
DO - 10.1016/j.electacta.2021.139470
UR - https://doi.org/10.1016/j.electacta.2021.139470
TI - Safe gel polymer electrolytes for high voltage Li-batteries
T2 - Electrochimica Acta
AU - Poiana, Ruggero
AU - Lufrano, Ernestino
AU - Tsurumaki, Akiko
AU - Simari, Cataldo
AU - Nicotera, Isabella
AU - Navarra, Maria Assunta
PY - 2022
DA - 2022/01/01 00:00:00
PB - Elsevier
SP - 139470
VL - 401
SN - 0013-4686
ER -
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@article{2022_Poiana,
author = {Ruggero Poiana and Ernestino Lufrano and Akiko Tsurumaki and Cataldo Simari and Isabella Nicotera and Maria Assunta Navarra},
title = {Safe gel polymer electrolytes for high voltage Li-batteries},
journal = {Electrochimica Acta},
year = {2022},
volume = {401},
publisher = {Elsevier},
month = {jan},
url = {https://doi.org/10.1016/j.electacta.2021.139470},
pages = {139470},
doi = {10.1016/j.electacta.2021.139470}
}