O<sub>2</sub> selective membranes based on a dextrin-nanosponge (NS) in a PVDF-HFP polymer matrix for Li–air cells

Amici, Julia; Alidoost, Mojtaba; Francia, Carlotta; Bodoardo, Silvia; Martínez-Crespiera, Sandra; Amantia, David; Biasizzo, Miriam; Caldera, Fabrizio; Trotta, Francesco

doi:10.1039/c6cc06954a

Cited by 36 publications

(27 citation statements)

References 17 publications

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“…Cathodes with OSMs have been demonstrated to be an efficient option allowing for ambient operation of Li-air batteries. [210][211][212][213] Besides functioning as a moisture and CO 2 barrier, the OSMs significantly decrease the evaporation rate of organic solvents. High O 2 permeability materials tend to also have high CO 2 permeability, therefore, most OSMs studied so far, only serves as good waterproofing, but poor CO 2 barriers.…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Liu

Guo

et al. 2019

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Over the past few years, great attention has been given to nonaqueous lithium-air batteries owing to their ultrahigh theoretical energy density when compared with other energy storage systems. Most of the research interest, however, is dedicated to batteries operating in pure or dry oxygen atmospheres, while Li-air batteries that operate in ambient air still face big challenges. The biggest challenges are H2O and CO2 that exist in ambient air, which can not only form byproducts with discharge products (Li2O2), but also react with the electrolyte and the Li anode. To this end, recent progress in understanding the chemical and electrochemical reactions of Li-air batteries in ambient air is critical for the development and application of true Li-air batteries. Oxygen-selective membranes, multifunctional catalysts, and electrolyte alternatives for ambient air operational Li-air batteries are presented and discussed comprehensively. In addition, sepa-rator modification and Li anode protection are covered. Furthermore, the challenges and directions for the future development of Li-air batteries are presented

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Section: Summary and Perspectivesmentioning

confidence: 99%

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Liu

Guo

et al. 2019

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“…Without BN, the TGA curve of PVDF-HFP/LiTFSI membrane exhibits a fast weight loss as the temperature increases from 30 °C , only 80 % of the initial weight remained at 300 °C . Due to the decomposition temperature of LiTFSI and PVDF-HFP in air are about 380 °C [27] and 475 °C , [28][29][30] respectively, the weight loss in this period is partially attributed to the evaporated of residual solvent after the drying process of hybrid electrolyte membrane preparation. The obvious weight losses after 300 °C and 400 °C in the TGA curve of the PVDF-HFP/LiTFSI hybrid electrolyte are believed to be due to the decomposition of LiTFSI and PVDF-HFP, and finally the weight was close to zero after 600 °C .…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Boron nitride enhanced polymer/salt hybrid electrolytes for all-solid-state lithium ion batteries

Zhang

Ruiz-Gonzalez

Choy

2019

Journal of Power Sources

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Solid state polymer electrolyte is a promising candidate for the next generation of all-solid-state lithium ion batteries due to its advantages of light weight, high stability to electrodes, non-flammable, sufficient mechanical strength to prevent lithium dendrite growth, and low cost. Here, through a facile and cost-effective route, two dimensional boron nitride (BN) is applied as an efficient additive in a polymer/salt hybrid electrolyte, which brings about high ionic conductivity, improved mechanical strength and intimate interfacial contact between the electrolyte and electrodes. A 1% BN addition into polymer/salt hybrid electrolyte membrane exhibits a high conductivity of 1.82×10-3 S/cm at room temperature. Indentation test shows the BN modified hybrid electrolyte possesses an enhanced hardness (4.99 MPa) and Young's modulus (0.133 GPa). The 1% BN modified hybrid electrolyte is demonstrated to effectively suppress the lithium dendrite growth during repeated striping and plating of lithium. As a result, the battery of lithium metal anode paired with LiFePO4 cathode and using the as-fabricated 1% BN enhanced polymer/salt hybrid electrolyte exhibits improved cycling performance with high Coulombic efficiency (over 98%).

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“…The thermal evaluation of the PVDF-HFP/LiTFSI composites was performed by TGA thermograms, which are shown in figure 3b for the different PVDF-HFP/LiTFSI composites. Figure 3b shows that the thermal decomposition of pristine PVDF-HFP occurs in a single step at ~465 ºC [43], whereas for PVDF-HFP/LiTFSI composites, a two steps decomposition is observed: the first decomposition at ~ 340 ºC is related to the degradation temperature of LiTFSI [44] and the second one is related to the degradation of the polymer. For PVDF-HFP/LiTFSI composites with LiTFSI above 30% a small loss of weight is observed after 100 °C related to the moisture that can be absorbed during the handling of the test sample.…”

Section: Polymer Phase Thermal and Mechanical Propertiesmentioning

confidence: 99%

Solid polymer electrolytes based on lithium bis(trifluoromethanesulfonyl)imide/poly(vinylidene fluoride -co-hexafluoropropylene) for safer rechargeable lithium-ion batteries

Gonçalves

Miranda

Almeida

et al. 2019

Sustainable Materials and Technologies

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The increasing use of electronic portable systems and the consequent energy demand, leads to the need to improve energy storage systems. According to that and due to safety issues, high-performance non-flammable electrolytes and solid polymer electrolytes (SPE) are needed. SPE containing different amounts of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) into a poly(vinylidene fluoride-co-hexafluoropropylene), PVDF-HFP, polymer matrix have been prepared by solvent casting. The addition of LiTFSI into PVDF-HFP allows to tailor thermal, mechanical and electrical properties of the composite.In particular, the ionic conductivity of the composites increases with LiTFSI content, the best ionic conductivities of 0.0011 mS/cm at 25º C and 0.23 mS/cm at 90 ºC were obtained for the PVDF-HFP/LiTFSI composites with 80wt.% of LiTFSI.This solid electrolyte allows the fabrication of Li metallic/SPE/C-LiFePO4 half-cells with a discharge capacity of 51.2 mAh.g -1 at C/20. Further, theoretical simulations show that the discharge capacity value depends on the lithium concentration and percentage of free ions and is independent of the solid polymer electrolyte thickness. On the other hand, the voltage plateau depends on the SPE thickness. Thus, a solid electrolyte is presented for the next generation of safer solid-state batteries.

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O₂ selective membranes based on a dextrin-nanosponge (NS) in a PVDF-HFP polymer matrix for Li–air cells

Cited by 36 publications

References 17 publications

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Boron nitride enhanced polymer/salt hybrid electrolytes for all-solid-state lithium ion batteries

Solid polymer electrolytes based on lithium bis(trifluoromethanesulfonyl)imide/poly(vinylidene fluoride -co-hexafluoropropylene) for safer rechargeable lithium-ion batteries

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O2 selective membranes based on a dextrin-nanosponge (NS) in a PVDF-HFP polymer matrix for Li–air cells

Cited by 36 publications

References 17 publications

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Boron nitride enhanced polymer/salt hybrid electrolytes for all-solid-state lithium ion batteries

Solid polymer electrolytes based on lithium bis(trifluoromethanesulfonyl)imide/poly(vinylidene fluoride -co-hexafluoropropylene) for safer rechargeable lithium-ion batteries

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Product

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O₂ selective membranes based on a dextrin-nanosponge (NS) in a PVDF-HFP polymer matrix for Li–air cells