Polypropylene/hydrophobic-silica-aerogel-composite separator induced enhanced safety and low polarization for lithium-ion batteries

Feng, Guanhua; He, Jingliang; Mi, Liwei; Zheng, Jinyun; Feng, Xiangming; Chen, Weihua

doi:10.1016/j.jpowsour.2017.11.086

Cited by 92 publications

(47 citation statements)

References 39 publications

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“…Although a few other lithium salts (e.g., lithium tetrafluoroborate (LiBF 4 ), [8] lithium bis(oxalato)borate (LiBOB), [9] and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) [10,11] ) have been widely investigated, none of them has been demonstrated as a viable replacement to LiPF 6 , yet. [13,14] Such a shrinkage, in fact, exposes the two electrodes to direct contact if cell overheating occurs, which may cause the internal short circuiting of the cell, boosting the occurrence of fire and/or even explosion. This is due to the transference number of PF 6 − being higher than that of Li + , which ultimately limits power delivery and favor lithium metal dendritic growth, this latter leading to severe safety issues.…”

Section: Introductionmentioning

confidence: 99%

Single‐Ion Conducting Electrolyte Based on Electrospun Nanofibers for High‐Performance Lithium Batteries

Qin

Zhang

et al. 2019

Advanced Energy Materials

129

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Herein, a novel electrospun single‐ion conducting polymer electrolyte (SIPE) composed of nanoscale mixed poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) and lithium poly(4,4′‐diaminodiphenylsulfone, bis(4‐carbonyl benzene sulfonyl)imide) (LiPSI) is reported, which simultaneously overcomes the drawbacks of the polyolefin‐based separator (low porosity and poor electrolyte wettability and thermal dimensional stability) and the LiPF6 salt (poor thermal stability and moisture sensitivity). The electrospun nanofiber membrane (es‐PVPSI) has high porosity and appropriate mechanical strength. The fully aromatic polyamide backbone enables high thermal dimensional stability of es‐PVPSI membrane even at 300 °C, while the high polarity and high porosity ensures fast electrolyte wetting. Impregnation of the membrane with the ethylene carbonate (EC)/dimethyl carbonate (DMC) (v:v = 1:1) solvent mixture yields a SIPE offering wide electrochemical stability, good ionic conductivity, and high lithium‐ion transference number. Based on the above‐mentioned merits, Li/LiFePO4 cells using such a SIPE exhibit excellent rate capacity and outstanding electrochemical stability for 1000 cycles at least, indicating that such an electrolyte can replace the conventional liquid electrolyte–polyolefin combination in lithium ion batteries (LIBs). In addition, the long‐term stripping–plating cycling test coupled with scanning electron microscope (SEM) images of lithium foil clearly confirms that the es‐PVPSI membrane is capable of suppressing lithium dendrite growth, which is fundamental for its use in high‐energy Li metal batteries.

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Section: Introductionmentioning

confidence: 99%

Single‐Ion Conducting Electrolyte Based on Electrospun Nanofibers for High‐Performance Lithium Batteries

Qin

Zhang

et al. 2019

Advanced Energy Materials

129

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“…In addition, redox peak pairs shown in the curves are observed between 3.29 and 3.56 V, which is due to the redox reaction of Fe 2+ /Fe 3+ . [ 52–55 ] The small voltage difference (∆ V ) between reduction voltage and oxidation voltage means a low cell resistance [ 56,57 ] , which is beneficial for a high electrochemical performance. Figure S3b, Supporting Information, shows the initial charge and discharge curves of LFP/C NF cell at 0.5 C. The specific discharge capacity is 155 mAh g −1 at 0.5 C. Moreover, the curves show high electrochemical reversibility with little loss of capacity in the charge and discharge curves.…”

Section: Resultsmentioning

confidence: 99%

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Kwon

et al. 2020

Advanced Science

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Stretchable lithium batteries have attracted considerable attention as components in future electronic devices, such as wearable devices, sensors, and body‐attachment healthcare devices. However, several challenges still exist in the bid to obtain excellent electrochemical properties for stretchable batteries. Here, a unique stretchable lithium full‐cell battery is designed using 1D nanofiber active materials, stretchable gel polymer electrolyte, and wrinkle structure electrodes. A SnO2/C nanofiber anode and a LiFePO4/C nanofiber cathode introduce meso‐ and micropores for lithium‐ion diffusion and electrolyte penetration. The stretchable full‐cell consists of an elastic poly(dimethylsiloxane) (PDMS) wrapping film, SnO2/C and LiFePO4/C nanofiber electrodes with a wrinkle structure fixed on the PDMS wrapping film by an adhesive polymer, and a gel polymer electrolyte. The specific capacity of the stretchable full‐battery is maintained at 128.3 mAh g−1 (capacity retention of 92%) even after a 30% strain, as compared with 136.8 mAh g−1 before strain. The energy densities are 458.8 Wh kg−1 in the released state and 423.4 Wh kg−1 in the stretched state (based on the electrode), respectively. The high capacity and stability in the stretched state demonstrate the potential of the stretchable battery to overcome its limitations.

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“…The prepared separator γ‐Al 2 O 3 /PVDF‐HFP/TTT owns high electrolyte uptake (157%) and ionic conductivity (1.3 mS cm −1 ) along with high thermal stability, as given in Figure a,b. Feng et al reported hydrophobic‐silica aerogel modified PP separator for LIBs, as given in Figure c. Owing to the rich porous structure, high affinity to liquid electrolytes, and high thermal insulation capability of hydrophobic‐silica aerogel, the reported modified PP separator compensated the defect of pristine PP separator by delivering a good performance.…”

Section: Types Of Separatorsmentioning

confidence: 99%

“…Copyright 2017, Elsevier B.V. c) Pictorial description of preparation methodology of polypropylene/hydrophobic silica‐aerogel‐composite separator (SAC), d) SEM image of polypropylene/hydrophobic silica‐aerogel‐composite separator, e) electrolyte uptake of PP and polypropylene/hydrophobic silica‐aerogel‐composite separators, and f) thermal shrinkage graphs of PP, PP/PVDF, and polypropylene/hydrophobic silica‐aerogel‐composite separators. Reproduced with permission . Copyright 2018, Elsevier B.V.…”

Section: Types Of Separatorsmentioning

confidence: 99%

Recent Development in Separators for High‐Temperature Lithium‐Ion Batteries

Waqas

Ali

Feng

et al. 2019

Small

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metric tons of carbon dioxide (CO 2 ) and other pollutants per year, which accelerate global warming and major climate changes. [2] In order to mitigate these serious issues caused by fossil fuels and to compete with the energy generating devices based on fossil fuels, renewable energy sources like solar energy, wind energy, bioenergy, and geothermal energy are potential alternative power resources. However, these renewable energy resources need highly efficient energy storage devices for integrating and well distribution of energy. Rechargeable battery technology with high energy, high power density, long life cycle capability, fast cycling rate, and reasonable cost is the possible solution to store energy obtained from these renewable sources. [3] Among many rechargeable energy storage devices, lithium-ion batteries (LIBs) are the promising energy sources for integrating renewable resources and high power applications, owing to high energy density, lightweight, high flexibility, slow self-discharge rate, high rate charging capability, long battery life, and environmental benignity. [4,5] The aforementioned attractive properties of rechargeable LIBs promote its utilization in the wide range of applications like laptops, cell phones, electric vehicle, hybrid electric vehicles, renewable power stations, stationary electric power, defense arsenal, subsurface exploration, thermal reactors, and space vehicles. [6][7][8][9] From the last 30 years, rapid development has been observed in LIBs technology. Presently, LIBs hold twofold energy density as compared to the first commercial LIBs developed by Sony in 1991, but still, there are some challenges associated with LIBs that need to be solved for achieving high power density and efficient performances at high and low temperatures. Safety, cost, and enhancement in energy and power densities are the major concerns in next generation LIBs. [10][11][12] Separator is one of the important components of LIBs that is not directly involved in the electrochemical reaction, however, its properties, structure, and composition greatly influence the performance of batteries with respect to internal resistance, long cycle performances, high capacity, and safety. [13] The basic functions of the separator are to prevent the contact between anode and cathode to avoid internal short circuits, store liquid electrolyte, and permit the migration of ions during the chargedischarge process. [14][15][16] The ideal separator should possess Lithium-ion batteries (LIBs) are promising energy storage devices for integrating renewable resources and high power applications, owing to their high energy density, light weight, high flexibility, slow self-discharge rate, high rate charging capability, and long battery life. LIBs work efficiently at ambient temperatures, however, at high-temperatures, they cause serious issues due to the thermal fluctuation inside batteries during operation. The separator is a key component of batteries and is crucial for the sustainability of LIBs at high-temperatures. Th...

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Polypropylene/hydrophobic-silica-aerogel-composite separator induced enhanced safety and low polarization for lithium-ion batteries

Cited by 92 publications

References 39 publications

Single‐Ion Conducting Electrolyte Based on Electrospun Nanofibers for High‐Performance Lithium Batteries

Single‐Ion Conducting Electrolyte Based on Electrospun Nanofibers for High‐Performance Lithium Batteries

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Recent Development in Separators for High‐Temperature Lithium‐Ion Batteries

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Polypropylene/hydrophobic-silica-aerogel-composite separator induced enhanced safety and low polarization for lithium-ion batteries

Cited by 92 publications

References 39 publications

Single‐Ion Conducting Electrolyte Based on Electrospun Nanofibers for High‐Performance Lithium Batteries

Single‐Ion Conducting Electrolyte Based on Electrospun Nanofibers for High‐Performance Lithium Batteries

Porous SnO2/C Nanofiber Anodes and LiFePO4/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Recent Development in Separators for High‐Temperature Lithium‐Ion Batteries

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Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance