Influence of the porosity degree of poly(vinylidene fluoride-co-hexafluoropropylene) separators in the performance of Li-ion batteries

Sousa, R.; Nunes-Pereira, J.; Costa, Carlos M.; Silva, Maria Manuela; Lanceros‐Méndez, S.; Hassoun, Jusef; Scrosati, B.; Appetecchi, Giovanni Battista

doi:10.1016/j.jpowsour.2014.04.014

Cited by 39 publications

(29 citation statements)

References 35 publications

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“…A progressive, almost linear, decrease in capacity is observed with increasing current density up to 1 C, associated to the diffusion phenomena taking place within the electrode active material phase and polymer electrolyte separator membrane [56].…”

Section: Battery Performance Evaluation In Li/c-lifepo 4 Swagelok Cellmentioning

confidence: 94%

Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators

et al. 2015

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Section: Battery Performance Evaluation In Li/c-lifepo 4 Swagelok Cellmentioning

confidence: 94%

Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators

et al. 2015

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“…The XRD pattern of PVDF-HFP/ colloidal-TiO 2 and PVDF-HFP/non-colloidal-TiO 2 separators agrees well with the JCPDS No. [40][41][42][43][44][45][46] However, the amplitude of suppression in PVDF-HFP/colloidal-TiO 2 is higher as compared with that in the PVDF-HFP/non-colloidal-TiO 2 . [30][31][32][33] It is observed that by introducing TiO 2 in PVDF-HFP, the peaks at 2q = 17.68, 19.58, and 38.788 show little change after adding TiO 2 , which verifies that the structure of the separator is well reserved and coherent upon incorporation of the oxide.…”

Section: Resultsmentioning

confidence: 99%

A Highly‐Efficient Composite Separator with Strong Ligand Interaction for High‐Temperature Lithium‐Ion Batteries

Waqas

Tan

et al. 2018

ChemElectroChem

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A PVDF-HFP/colloidal-TiO 2 composite separator is synthesized for high-temperature lithium-ion batteries. Incorporation of colloidal TiO 2 in the PVDF-HFP matrix forms a highly-uniform composite micro-structure with strong adsorption interactions between TiO 2 and PVDF-HFP due to the presence of citric acid. The strong interactions are giving rise to advantageous mechanical robustness, separator/electrode interface and electrolyte uptake. The separator shows remarkable stability upon thermal treatment at 150 8C. With a high ionic conductivity up to 1.57 10 À3 S cm À1 , the LFP/Li cell with PVDF-HFP/colloidal-TiO 2 composite separator delivers charge-discharge capacities of 156.95 mAh g À1 (0.1 C) at room temperature and 120.8 mAh g À1 (0.5 C) after annealing cells at 140 8C for 3 hours with a 99 % capacity retention after 100 cycles. The PVDF-HFP/colloidal-TiO 2 separator demonstrates promising potentials for practical applications in high-temperature environments.

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“…The porosity of polymer electrolytes plays a vital role in improving the ionic conductivity of the polymer electrolyte and the performance of Li‐ion batteries . The morphology of the SIPE membranes was investigated by using FE‐SEM (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…[11] Morphology Thep orosity of polymer electrolytes plays av ital role in improving the ionic conductivityo ft he polymer electrolytea nd the performance of Li-ion batteries. [12] Them orphologyo f the SIPE membranes was investigated by using FE-SEM ( Figure 2). Both membranes displays mooth morphologies with very small blind pores botho nt he membrane surfaces and cross-sectional images.…”

Section: Resultsmentioning

confidence: 99%

Overcoming the Ambient‐Temperature Operation Limitation in Lithium‐Ion Batteries by using a Single‐Ion Polymer Electrolyte Fabricated by Controllable Molecular Design

et al. 2017

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A polymer electrolyte with a particular molecular architecture plays a critical role in the improvement of the performances of both a polymer electrolyte and a battery device. Here, we present the design and synthesis of a sp3‐boron‐based single‐ion polymer electrolyte (SIPE), lithium poly(bisphenol AF borate) (LiPFB), by using partially aromatic bisphenol AF as a linker. As a result of the torsional, flexible, and strong electron‐withdrawing properties of the bistrifluoromethyl methylene group (−C(CF3)2−), the prepared poly(vinylidene fluoride‐co‐hexafluoropropene (PVDF‐HFP)/LiPFB membrane displays an enhanced ionic conductivity and a remarkable compatibility with electrodes compared to that of the PVDF‐HFP/lithium poly(4,4′‐biphenol borate) membrane, in which a linear and fully aromatic 4,4′‐biphenol is used as a linker. Consequently, an excellent battery performance both at room temperature and high charge/discharge rates was demonstrated. This study underscores the fundamental importance of the molecular structure of SIPE materials in battery performance enhancement and suggests ways to design new SIPE materials to enhance battery devices with improved electrochemical performance.

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Influence of the porosity degree of poly(vinylidene fluoride-co-hexafluoropropylene) separators in the performance of Li-ion batteries

Cited by 39 publications

References 35 publications

Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators

Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators

A Highly‐Efficient Composite Separator with Strong Ligand Interaction for High‐Temperature Lithium‐Ion Batteries

Overcoming the Ambient‐Temperature Operation Limitation in Lithium‐Ion Batteries by using a Single‐Ion Polymer Electrolyte Fabricated by Controllable Molecular Design

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