A newly-developed heat-resistance polyimide microsphere coating to enhance the thermal stability of commercial polyolefin separators for advanced lithium-ion battery

Yu, Junfeng; Dong, Nianguo; Liu, Bingxue; Tian, Guofeng; Qi, Shengli; Wu, Dezhen

doi:10.1016/j.cej.2022.136314

Cited by 55 publications

(22 citation statements)

References 42 publications

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“…The characteristic peak at 3.95 ppm mapping the −NH 2 group indicated the daidzein-based diamine. 1 H NMR spectra integrated by MestReNova software showed that the ratio of the peak area was 1:1:2:4:4:4:4, which coincided with the structure of the inferred daidzein-based diamine (Figures 2a, S17, and S18). The (−O−CH�C−) group of daidzein-based dianhydride was detected at 8.24 ppm, and the ratio of the peak area of 1 H NMR spectra is 1:2:1:2:4:4 (Figures 2b, S6, and S7).…”

Section: Structure Analysis Of Daidzein-based Monomers Andmentioning

confidence: 59%

“…PIs. 1 H NMR and FTIR spectra illustrate the synthesized structure of daidzein-based monomers and PIs (Figures 2, S6− S11, and S17−S21). The characteristic peak at 3.95 ppm mapping the −NH 2 group indicated the daidzein-based diamine.…”

Section: Structure Analysis Of Daidzein-based Monomers Andmentioning

confidence: 99%

“…Polyimides (PIs) are inescapable and irreplaceable raw materials in engineering plastics, aerospace, and military fields owing to their confluence in heat resistance, − good electrical conductivity, ,, and strong mechanical properties. ,− However, the traditional PIs are derived from fossil-based raw materials, which not only bring environmental pollution during the refining process but also speed up fossil fuel depletion. , Sustainable material concepts emphasize reduced fossil-based polymer dependence. − Selective transformations of biomass to create PIs provide a promising alternative since biogenic feedstocks use solar energy and CO 2 to produce compounds . In addition, the carcinogenicity of petroleum-derived diamines have posed health challenges for users and sparked widespread controversy. − Currently, bio-based PIs have been limited to the addition of bio-based content, which is far from the early goals of revolutionary replacement. − This limitation is mainly attributed to the design contradiction between bio-based sources and polymer properties.…”

Section: Introductionmentioning

confidence: 99%

“…Polyimides (PIs) are inescapable and irreplaceable raw materials in engineering plastics, aerospace, and military fields owing to their confluence in heat resistance, 1−5 good electrical conductivity, 1,3,6 and strong mechanical properties. 3,7−9 However, the traditional PIs are derived from fossil-based raw materials, which not only bring environmental pollution during the refining process but also speed up fossil fuel depletion.…”

Section: ■ Introductionmentioning

confidence: 99%

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High-Performance Polyimides Derived from Biomass: Design, Synthesis, and Properties

Gong

Liu

Tao

et al. 2023

ACS Sustainable Chem. Eng.

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The development of sustainable polyimides (PIs) from abundant renewable biogenic feedstocks has been limited by the bio-based content and the lack of mechanical and thermal properties. This study synthesized a series of daidzein-based PIs with a high bio-based content of up to 53%, which was significantly higher than the reported bio-based content (approximately 40%). The mechanical and thermal stability of the obtained polymer is comparable with that of commercial PIs, with the tensile strength of 148.6 MPa and the glass transition temperature (T g ) of 318.2 °C. Additionally, the daidzein-based PIs showed excellent fluorescence characteristics with a maximum fluorescence efficiency of 45.18 ns and an absolute fluorescence quantum yield of 14.1%. Such a performance combination has not been reported in bio-based PIs, even petrochemical PIs. Interestingly, the integration of experiments and density functional theoretical calculations revealed an effective intermolecular and intramolecular conjugation and the inhibition effect of intramolecular charge transfer by "enone and ether bonds" in daidzein-derived PIs. This work provides a possible route for the design and synthesis of multifunctional PIs with high bio-based content.

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Section: Structure Analysis Of Daidzein-based Monomers Andmentioning

confidence: 59%

Section: Structure Analysis Of Daidzein-based Monomers Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-Performance Polyimides Derived from Biomass: Design, Synthesis, and Properties

Gong

Liu

Tao

et al. 2023

ACS Sustainable Chem. Eng.

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show abstract

“…38 The increased elongation at the break of the HPI@PE composite separator demonstrates the strong adhesion of the HPI nanofiber layer. 27 As seen from Figure S3b, compared with the PE separator (331.3 MPa) and HPI separator (21.9 MPa), the initial modulus of the HPI@PE separator increased to 694.2 MPa, which indicates that the HPI@PE separator has excellent resistance to Li dendrite piercing. 39 Separators with high thermal stability can improve battery safety during thermal runaways.…”

Section: Resultsmentioning

confidence: 82%

H-Bond Cross-Linked Polyimide Nanofiber-Modified Polyethylene Composite Separators for Lithium-Ion Batteries

et al. 2023

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H-bond cross-linked polyimide (HPI) nanofibermodified polyethylene (PE) composite separators with high thermal stability, excellent electrolyte wettability, and improved electrochemical performance are prepared by electrospinning and alkaline hydrolysis processes. Due to the high thermal stability of the layer of HPI nanofiber, the dimension stability of the HPI@PE separator is greatly enhanced compared to the PE separator, without obvious thermal shrinkage at 200 °C. In comparison to the PE separators, lithium-ion batteries (LIBs) assembled with the HPI@PE composite separators show better cycling performance and rate capability, which are ascribed to the high polarity and developed porosity of the HPI nanofiber layer, which gives the separator excellent electrolyte wettability (electrolyte uptake and retention are 204 and 65%, respectively), low bulk resistance (3.1 Ω), and high ionic conductivity (0.46 mS cm −1 ). Therefore, the assembled Li/HPI@PE/LiCoO 2 cell achieves a specific capacity of 105.5 mA h g −1 as well as a capacity retention of 80.7% after 200 cycles at the discharge rate of 1 C. These results indicate that the prepared HPI@PE separator is applicable toward safe, long-life, and high-rate LIBs.

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Integrating an In‐Plane Electron‐Conductive Separator to Enable Short‐Circuit Warning in Lithium–Sulfur Batteries

Wang

Yan

et al. 2023

Advanced Sustainable Systems

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Lithium–sulfur (Li–S) batteries are one of the most competitive candidates for high‐energy‐density batteries. However, the high energy density and high reactivity of the lithium anode and sulfur cathode make the safety issues of Li–S batteries particularly prominent. Herein, an early warning strategy for the short circuits in Li–S batteries is explored by integrating an in‐plane electron‐conductive separator. The internal short circuits caused by lithium dendrites or manufacturing defects can be quickly and accurately predicted before catastrophic thermal runaway, with enough time to take rescue measures. The separator with high thermal conductivity also facilitates the heat dissipation of the cell, thus reducing the risk of thermal runaway under abuse. The fast and reliable early warning strategy based on the in‐plane electron‐conductive separator builds the Great Wall of active defense against inherently unsafe Li–S batteries.

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A newly-developed heat-resistance polyimide microsphere coating to enhance the thermal stability of commercial polyolefin separators for advanced lithium-ion battery

Cited by 55 publications

References 42 publications

High-Performance Polyimides Derived from Biomass: Design, Synthesis, and Properties

High-Performance Polyimides Derived from Biomass: Design, Synthesis, and Properties

H-Bond Cross-Linked Polyimide Nanofiber-Modified Polyethylene Composite Separators for Lithium-Ion Batteries

Integrating an In‐Plane Electron‐Conductive Separator to Enable Short‐Circuit Warning in Lithium–Sulfur Batteries

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