Mesoporous poly(vinylidene fluoride-co-trifluoroethylene) membranes for lithium-ion battery separators

Costa, Carlos M.; Kundu, Manab; Dias, J. C.; Nunes-Pereira, J.; Botelho, Gabriela; Silva, Maria Manuela; Lanceros‐Méndez, S.

doi:10.1016/j.electacta.2019.01.178

Cited by 28 publications

(21 citation statements)

References 74 publications

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“…Alternatively, Wang et al reports the fabrication of separator by solution electrospining based on soluble PAEK polymers, the process can be easily scaled up 20–23 . All the separators exhibited excellent thermal stability, and the separators based on PAEK copolymers with fluoroinated and methylated structure exhibited the best electrochemical properties, which was similar to the previously reported fluorinated polymeric separators (poly(vinylidene fluoride), PVDF; poly(vinylidene fluoride‐co‐hexafluoropropylene), P(VDF‐HFP) et al) and might be attributed to the compatibility of fluoro with the electrolyte 24–27 …”

Section: Introductionsupporting

confidence: 63%

Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

Zhi-bin

Chen

Huo

et al. 2021

J of Applied Polymer Sci

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To improve the safety and electrochemical properties of lithium ion batterie (LIB), a series of novel organic soluble poly(aryl ether ketone) (PAEK) copolymers were synthesized and used to fabricate LIB separators. The PAEK copolymers exhibited superior structural thermal stability and flame retardant, with glass transition temperature (Tg) above 150°C, oxygen index above 30 and no thermal decomposition before 500°C. Accordingly, the fabricated separators exhibited superior dimensional stability. The mechanical properties and electrolyte uptakes of the separators, as well as the electrochemical properties of the cells assembled with the separators were affected by the morphology and porosity of the separators. The separators with sponge‐like structure exhibited less electrolyte uptakes but better mechanical properties than that of the ones with finger‐like structure. The cell with finger‐like structure separator exhibited poorer electrochemical properties than sponge‐like structure separator, which might be caused by the collapse of some finger hole during the assemble process due to its poor mechanical properties. The charge–discharge performances of the cells after treated at 150°C demonstrates that the PAEK separators could be promising candidates for high‐safety LIB.

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Section: Introductionsupporting

confidence: 63%

Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

Zhi-bin

Chen

Huo

et al. 2021

J of Applied Polymer Sci

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“…The profiles are shown for half‐cells with a glass fiber separator and for half‐cells with the different TiO 2 /PVDF‐TrFE separator membranes in the potential window between 2.5 and 4.2 V. It observed the typical plateau at around 3.4 V that corresponds to the presence of a two‐phase coexistence reaction for LiFePO 4 cathode (Fe 2+ /Fe 3+ redox reaction between FePO 4 and LiFePO 4 ). [ 46 ] A similar electrochemical behavior for the membranes with 0, 5, and 10 wt% TiO 2 content is observed, with a high capacity around 140 mAh g −1 , which corresponds to 82% of the theoretical capacity ( C = 170 mAh g −1 ), whereas the TiO 2 /PVDF‐TrFE membrane with 20 wt% of TiO 2 shows a much lower capacity value when compared with the other membranes (71 mAh g −1 , 42% of the theoretical capacity). This behavior results from the combination of several factors, such as high electrolyte uptake, ionic conductivity, and lithium transference number values.…”

Section: Resultsmentioning

confidence: 99%

Porous Composite Bifunctional Membranes for Lithium‐Ion Battery Separator and Photocatalytic Degradation Applications: Toward Multifunctionality for Circular Economy

Serra

Fidalgo‐Marijuan

Martins

et al. 2021

Adv Energy and Sustain Res

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“…The improved porosity leads to better electrochemical characteristics of the membrane [50]. The enhanced porosity is vital for the application of the membrane as a separator for lithium ion batteries, but has an adverse effect on the mechanical strength of the membranes [10,51]. The extreme stress experienced by the PL membranes was found to be approximately 10 MPa, i.e., for P-L30, as shown in Figure S3.…”

Section: Resultsmentioning

confidence: 99%

“…The separator is the component that keeps the two electrodes apart, as their contact may lead to the battery short-circuiting. Apart from this, the separator is very valuable in terms of assisting ion transportation during both charging and discharging of the lithium ion battery [10,11,12,13,14,15,16]. Enhanced porosity, good electrolyte uptake, and better thermal stability are some of the essential features that help polymer membranes qualify as a competent separator for lithium ion batteries [17].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Highly Porous PAN-LATP Membranes as Separators for Lithium Ion Batteries

et al. 2019

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Separators are a vital component to ensure the safety of lithium-ion batteries. However, the commercial separators employed in lithium ion batteries are inefficient due to their low porosity. In the present study, a simple electrospinning technique is adopted to prepare highly porous polyacrylonitrile (PAN)-based membranes with a higher concentration of lithium aluminum titanium phosphate (LATP) ceramic particles, as a viable alternative to the commercialized separators used in lithium ion batteries. The effect of the LATP particles on the morphology of the porous membranes is demonstrated through Field emission scattering electron microscopy. X-ray diffraction and Fourier transform infrared spectra studies suitably demonstrate the mixing of PAN and LATP particles in the polymer matrix. PAN with 30 wt% LATP (P-L30) exhibits an enhanced porosity of 90% and is more thermally stable, with the highest electrolyte uptake among all the prepared membranes. Due to better electrolyte uptake, the P-L30 membrane demonstrates an improved ionic conductivity of 1.7 mS/cm. A coin cell prepared with a P-L30 membrane and a LiFePO4 cathode demonstrates the highest discharge capacity of 158 mAh/g at 0.5C rate. The coin cell with the P-L30 membrane also displays good cycling stability by retaining 87% of the initial discharge capacity after 200 cycles of charging and discharging at 0.5C rate.

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Mesoporous poly(vinylidene fluoride-co-trifluoroethylene) membranes for lithium-ion battery separators

Cited by 28 publications

References 74 publications

Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

Porous Composite Bifunctional Membranes for Lithium‐Ion Battery Separator and Photocatalytic Degradation Applications: Toward Multifunctionality for Circular Economy

Preparation of Highly Porous PAN-LATP Membranes as Separators for Lithium Ion Batteries

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