Electrospun PI@GO separators for Li-ion batteries: a possible solution for high-temperature operation

Song, Kedong; Huang, Yuting; Xing, Lida; Jiang, Yunhong; Zhang, Ping; Ding, Yanhuai

doi:10.1007/s10971-019-05063-7

Cited by 12 publications

(7 citation statements)

References 41 publications

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“…Meanwhile, many researches of electrospun separators about polymer matrix, such as PVDF, PAN, poly(methyl methacrylate) (PMMA), and PI, have been continuously reported 23–26 . Among these, PVDF is often selected as the polymer matrix because the β‐phase of PVDF crystal has high polarity and piezoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Jia

Huang

Long

et al. 2020

J of Applied Polymer Sci

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This work aims to obtain more hydrophilic and thermal stable electrospun fibrous membranes for lithium‐ion battery separators. For this purpose, the polyvinylidene fluoride/polyacrylonitrile (PVDF/PAN) separators are fabricated via electrospinning and modified by an electron beam with different doses. These preparation processes are simple, fast, and environmentally friendly. As the same time, the physical and electrochemical properties of these separators are investigated in detail. The results indicated that all the irradiated PVDF/PAN (the mass ratio of PVDF and PAN is 1:1) separators can maintain a complete structure till 170°C due to their cross‐linking structure. Besides, the 150‐kGy‐irradiated PVDF/PAN separator exhibits high porosity (82%), excellent electrolyte absorption (497%), and high ionic conductivity (3.19 mS cm−1). As a consequence, the cells with 150‐kGy‐irradiated PVDF/PAN separators show better the C‐rate performance and cycling stability than those of the cells with polypropylene separators and nonirradiated PVDF/PAN separators.

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Section: Introductionmentioning

confidence: 99%

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Jia

Huang

Long

et al. 2020

J of Applied Polymer Sci

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“…The obtained PI-SiO 2 composite separator showed excellent electrolyte wettability and large electrolyte uptake (about 2400%), and the LiMn 2 O 4 ||Li cell with the PI-SiO 2 separator exhibited highly improved rate capability and cycling stability at 55°C. In addition to metal oxides, graphene oxide has also been incorporated to improve the porosity, electrolyte absorption rate, and ionic conductivity of the fiber membrane [90,93]. Consequently, the electrochemical performance of the GO/PI film was much better than that of the pure PI membrane.…”

Section: Pi/ceramic Compositesmentioning

confidence: 99%

Polyimide separators for rechargeable batteries

Sui

Miao

et al. 2021

Journal of Energy Chemistry

113

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“…Microstructure, chemical composition and surface properties of the separator and the composition and viscosity of the electrolyte are critical parameters to assess separator‐electrolyte interactions. [ 133–150 ] The compatibility of the separator with the electrolyte can be evaluated with both the Hildebrand solubility and Flory‐Huggins parameters. [ 147 ] The solubility parameter,

δ

, is related to the molar energy change,

Δ E_{v}

(cohesion energy), and molar volume,

V_{m}

, as shown in Equation (9):

δ = \sqrt{(Δ E_{v} / V_{m})}

…”

Section: Characterization Of Separatormentioning

confidence: 99%

Recent advances in separator engineering for effective dendrite suppression of Li‐metal anodes

et al. 2021

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Lithium dendrites cause battery failures and safety hazards in liquid‐electrolyte lithium‐based batteries. To address this problem, each component of the battery, such as cathode, anode, electrolyte and separator, should be well matched and engineered for the integrated battery system. The separator plays an increasingly important role owing to its gradual transformation from an inert to an active component in the battery, especially for resolving Li dendrite issues in Li‐metal batteries. Armed with advanced nanotechnology solutions, separator engineering presents a formidable strategy to suppress dendrite growth dynamics by modifying the electrolyte chemistry, regulating/trapping unwanted ionic species and redirecting dendrite growth direction. This review summarizes recent advances in separator engineering for effective dendrite suppression of Li‐metal anodes. We first introduce the challenges that the Li‐metal anode faces and the irreplaceable role of separators in the battery system. The characterization parameters and design principles of separators are also discussed. Then, the mainstream techniques for separator functionalization and their impacts on dendrite suppression are scrutinized and highlighted. Lastly, the conclusion is drawn and the future outlook for separator engineering is presented.

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Electrospun PI@GO separators for Li-ion batteries: a possible solution for high-temperature operation

Cited by 12 publications

References 41 publications

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Polyimide separators for rechargeable batteries

Recent advances in separator engineering for effective dendrite suppression of Li‐metal anodes

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