Article (Scientific journals)
Development of a thin flexible Li battery design with a new gel polymer electrolyte operating at room temperature
Porthault, H.; Calberg, Cédric; Amiran, J. et al.
2021In Journal of Power Sources, 482, p. 229055
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Keywords :
Gel polymer electrolyte; IoT; Battery design; Lithium metal battery
Abstract :
[en] In this study, we develop a new Li-metal battery design merging with IoT requirements, mainly the low thickness, the thermal stability and the flexibility. To reach these specifications, we firstly prepared an efficient gel polymer electrolyte (GPE) composed of a PVDF-HFP polymer network, a LiFSI: Pyr13FSI liquid binary solution and a lithium montmorillonite Li-MMT clay. The as-synthesized material exhibits a high ionic conductivity (0.48 mS cm-1 at 25 ◦C) and a good thermal stability, up to 140 ◦C. In parallel, a new battery design with an optimized ratio of packaging to active material thickness is developed. In this design, copper foils act both as current collector and as battery casing, decreasing the overall cell thickness. Li metal batteries are realized using the developed GPE material and this new battery design. The cell thickness is 360 and 760 μm for single side and double-sided architectures respectively. These batteries show well functioning under high bending and exhibit a good cycling ability with a remaining capacity higher than 85% after more than 200 cycles at 25 ◦C. Thanks to the combination of the original Cu packaging and the flexible GPE membrane, developed Li-metal batteries exhibit promising properties to merge with the new IoT requirements.
Disciplines :
Energy
Materials science & engineering
Chemical engineering
Chemistry
Author, co-author :
Porthault, H.;  Univ. Grenoble Alpes, CEA > LETI
Calberg, Cédric ;  Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Amiran, J.;  Univ. Grenoble Alpes, CEA > LETI
Martin, S.;  Univ. Grenoble Alpes, CEA > LETI
Pàez Martinez, Carlos ;  Université de Liège - ULiège > Department of Chemical Engineering > Ingéniérie électrochimique
Job, Nathalie  ;  Université de Liège - ULiège > Department of Chemical Engineering > Ingéniérie électrochimique
Heinrichs, Benoît ;  Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Liquet, Dimitri ;  Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Salot, R.;  Univ. Grenoble Alpes, CEA > LETI
Language :
English
Title :
Development of a thin flexible Li battery design with a new gel polymer electrolyte operating at room temperature
Publication date :
2021
Journal title :
Journal of Power Sources
ISSN :
0378-7753
Publisher :
Elsevier, Netherlands
Volume :
482
Pages :
229055
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 692482 - EnSO - Energy for Smart Objects
Name of the research project :
EnSO project
Funders :
UE - Union Européenne [BE]
CE - Commission Européenne [BE]
Available on ORBi :
since 21 October 2020

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