Battery performances and thermal stability of polyacrylonitrile nano-fiber-based nonwoven separators for Li-ion battery

Cho, Tae-Hyung; Tanaka, Mirai; Ōnishi, Hiroshi; Kondo, Yuka; Nakamura, Tatsuo; Yamazaki, Hiroto; Tanase, Shigeo; Sakai, Tetsuo

doi:10.1016/j.jpowsour.2008.03.010

Cited by 243 publications

(142 citation statements)

References 8 publications

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“…Gel polymer electrolytes, having the characteristics of both solid and liquid electrolytes, provide a promising strategy towards satisfied ionic conductivity, wide electrochemical window, and good compatibility with electrodes. The favorable polymer matrixes for gel polymer electrolytes include PEO, 221 poly(acrylonitrile), 222 poly(methyl methacrylate), 223 PVDF, 224 and PVDF based copolymers, such as PVDF-co-trifluoroethylene and PVDF-co-hexafluoropropylene. 225,226 The typically micrometer-sized pores in these polymer matrixes ensure facile pathways of lithium ions, but lack the ability to prevent soluble redox species from crossing over the membrane.…”

Section: Polymeric Electrolytesmentioning

confidence: 99%

A chemistry and material perspective on lithium redox flow batteries towards high-density electrical energy storage

et al. 2015

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Electrical energy storage system such as secondary batteries is the principle power source for portable electronics, electric vehicles and stationary energy storage. As an emerging battery technology, Li-redox flow batteries inherit the advantageous features of modular design of conventional redox flow batteries and high voltage and energy efficiency of Li-ion batteries, showing great promise as efficient electrical energy storage system in transportation, commercial, and residential applications. The chemistry of lithium redox flow batteries with aqueous or non-aqueous electrolyte enables widened electrochemical potential window thus may provide much greater energy density and efficiency than conventional redox flow batteries based on proton chemistry. This Review summarizes the design rationale, fundamentals and characterization of Li-redox flow batteries from a chemistry and material perspective, with particular emphasis on the new chemistries and materials. The latest advances and associated challenges/ opportunities are comprehensively discussed.

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Section: Polymeric Electrolytesmentioning

confidence: 99%

A chemistry and material perspective on lithium redox flow batteries towards high-density electrical energy storage

et al. 2015

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“…[7][8][9] Commercial microporous polyolefin separators fulfill some of these requirements, but still display low porosity, poor wettability and can undergo shrinking or melting in case of battery overheating, thus contributing to high internal resistance of the cell and limited cycle life. 10,11 Poly(vinylidene fluoride) (PVdF) and its co-polymers are considered valuable substitutes of polyolefins due to their good chemical resistance, high mechanical strength and excellent thermal stability. 12,13 Recently, highly porous membranes produced by electrospinning has been widely investigated as separators in lithium-ion batteries due to the unique properties of the nanofibrous non-woven constructs: high porosity (typically 80-90%), high pore interconnectivity and high surface area to volume ratio that lead to a large electrolyte uptake and excellent ion transport.…”

mentioning

confidence: 99%

Effect of Silica and Tin Oxide Nanoparticles on Properties of Nanofibrous Electrospun Separators

Zaccaria

Fabiani

Cannucciari

et al. 2015

J. Electrochem. Soc.

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Innovative separators able to improve the performance and safety of Li-ion batteries are under investigation to meet the growing demand for large-size and high energy density electrochemical cells. In this work, highly porous nanofibrous Poly(vinylidene fluoride) (PVdF) separators loaded with oxide nanoparticles were produced by electrospinning. Silicon oxide and tin oxide nanoparticles were added to PVdF and membranes were characterized by SEM-EDS and TGA. The effect of nanoparticle addition on electrolyte uptake, mechanical properties and conductivity was investigated and such properties were compared to those of a commercial separator (Celgard 2400). Results showed that a small amount of additive can significantly improve the properties of PVdF electrospun membranes and that the different nanoparticles investigated in this work have different effect on membrane performances. In particular, the addition of SiO 2 increases the rate of electrolyte uptake and the toughness of the electrospun membrane, while the addition of SnO 2 decreases the rate of electrolyte uptake and increases the stiffness of the electrospun membrane. When loaded with nanoparticles, PVdF membranes maintain their insulating character also at high temperature. Nowadays, lithium-ion batteries control electronic device market (e.g. laptops, mobile phones, cameras) due to their high energy density, high efficiency and long cycle life. However, a breakthrough is needed in order to fulfil new requirements of hybrid and electric vehicles and energy storage devices, in terms of costs, better electrochemical performances and safety.

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“…[1,2] However, these polyolefin-based separators suffer from poor wettability, poor thermal shrinkage and low transverse mechanical strength. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] The poor wettability impairs the power capability and cycle life of the battery, and brings additional disadvantages in the manufacturing speed. To improve the wettability, a polydopamine (DPA) treatment was developed in addition to the plasma surface treatment technology.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] The poor thermal shrinkage and low transverse mechanical strength of PE or PP separator have aroused serious concern on internal electrical short circuit at high discharge rates or under vigorous conditions such as abnormal heating and mechanical rupture. Many efforts have been made to improve the thermal stability and mechanical strengths using composite or hybrid materials, such as incorporating inorganic particles onto the surface of commercialized separators [9][10][11][12][13] or adopting heat resistant polymers, e.g., polyacrylonitrile (PAN), [14][15][16][17] poly(ethylene terephthalate) (PET), [18][19][20] polyimide (PI) [21] and poly( p-phenylene terephthalamide) (PPTA) [22] as building blocks to reinforce the thermal stability. Among them, a number of composite separators or gel electrolytes were made by a dip-coating or blade-coating on the microporous substrates, e.g., PE/ poly(ethylene oxide) (PEO) and PEO/poly[(vinylidene fluoride)-co-hexafluoropropene] (PVDF-HFP), [13] PET/SiO 2 and PET/PVDF-HFP, [18] PET/PVDF-HFP [19] and PET/poly(methyl methacrylate) (PMMA).…”

Section: Introductionmentioning

confidence: 99%

A Core@sheath Nanofibrous Separator for Lithium Ion Batteries Obtained by Coaxial Electrospinning

Liu

Jiang

Kong

et al. 2012

Macro Materials & Eng

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A composite core@sheath nanofibrous separator for lithium ion batteries is fabricated via coaxial electrospinning, using thermosetting PI as the core material and PVDF‐HFP as the sheath material. It is demonstrated that the PI@PVDF‐HFP nonwovens display remarkably improved tensile strength up to 53 MPa and high thermal stability up to 300 °C. The electrochemical characterization shows that cells using core@sheath nonwovens as separators display better rate capability and better cycling capacity retention. Considerable mechanical strength, higher thermal stability and preferable rate capability might make this kind of core@sheath nonwovens promising separators for higher‐power application. magnified image

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Battery performances and thermal stability of polyacrylonitrile nano-fiber-based nonwoven separators for Li-ion battery

Cited by 243 publications

References 8 publications

A chemistry and material perspective on lithium redox flow batteries towards high-density electrical energy storage

A chemistry and material perspective on lithium redox flow batteries towards high-density electrical energy storage

Effect of Silica and Tin Oxide Nanoparticles on Properties of Nanofibrous Electrospun Separators

A Core@sheath Nanofibrous Separator for Lithium Ion Batteries Obtained by Coaxial Electrospinning

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