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

Liu, Zhihong; Jiang, Wen; Kong, Qingshan; Zhang, Chuanjian; Han, Peng; Wang, Xuejiang; Yao, Jianhua; Cui, Guanglei

doi:10.1002/mame.201200158

Cited by 50 publications

(26 citation statements)

References 42 publications

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“…However, in the case of the PE separator cell, a discharge capacity of 137.5 mAh/g during the first cycle was found, and 83.6% of the initial discharge capacity after 500 cycles was retained. The average capacity decay rate of the two electrospun PI/PVdF composite separators with two different architectures (single core-shell and co-electrospun incorporating functionalized TiO 2 )1326 and other two thermally stable separators of different materials (polyaniline/polyimide composite with hierarchical 3D micro/nano-architecture, PANI/PI_3D, and partially oxidized polyacrylonitrile, Oxidized PAN)3233 are plotted with the average capacity decay rate of the MCS1 separator in Fig. 4e to compare the long-term cycle performance.…”

Section: Resultsmentioning

confidence: 99%

“…It requires only one single nozzle feed from a single type of dope. Compared with the other two electrospun PI/PVdF composite separators with different architectures (a single core-shell and co-electrospun separator incorporating functionalized TiO 2 ) that were derived from multiple types of feedlines1326, the MCS PI/PVdF separator prepared using a single nozzle had the best long-term stability in terms of the average capacity decay rate. The feasibility of PI droplet formation and deformation into core fibrils during the process were studied using a phase field theory.…”

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confidence: 97%

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Multicore-shell nanofiber architecture of polyimide/polyvinylidene fluoride blend for thermal and long-term stability of lithium ion battery separator

Park

Son

Lee

et al. 2016

Sci Rep

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Li-ion battery, separator, multicoreshell structure, thermal stability, long-term stability. A nanofibrous membrane with multiple cores of polyimide (PI) in the shell of polyvinylidene fluoride (PVdF) was prepared using a facile one-pot electrospinning technique with a single nozzle. Unique multicore-shell (MCS) structure of the electrospun composite fibers was obtained, which resulted from electrospinning a phase-separated polymer composite solution. Multiple PI core fibrils with high molecular orientation were well-embedded across the cross-section and contributed remarkable thermal stabilities to the MCS membrane. Thus, no outbreaks were found in its dimension and ionic resistance up to 200 and 250 °C, respectively. Moreover, the MCS membrane (at ~200 °C), as a lithium ion battery (LIB) separator, showed superior thermal and electrochemical stabilities compared with a widely used commercial separator (~120 °C). The average capacity decay rate of LIB for 500 cycles was calculated to be approximately 0.030 mAh/g/cycle. This value demonstrated exceptional long-term stability compared with commercial LIBs and with two other types (single core-shell and co-electrospun separators incorporating with functionalized TiO2) of PI/PVdF composite separators. The proper architecture and synergy effects of multiple PI nanofibrils as a thermally stable polymer in the PVdF shell as electrolyte compatible polymers are responsible for the superior thermal performance and long-term stability of the LIB.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 97%

Multicore-shell nanofiber architecture of polyimide/polyvinylidene fluoride blend for thermal and long-term stability of lithium ion battery separator

Park

Son

Lee

et al. 2016

Sci Rep

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“…A coaxial electrospinning technique was reported to prepare core-sheath polyimide (PI)/PVDF-HFP nanofibers for battery separator application [17]. In comparison with the separator prepared by pure nanofibers, this core-sheath nanofiber separator was more stable in liquid electrolyte and had higher battery discharge capacity, better isotropic mechanical strength, and thermal stability ( Fig.…”

Section: Lithium-ion Batteriesmentioning

confidence: 97%

Applications of Electrospun Nanofibers for Electronic Devices

Fang¹,

Shao²,

Niu³

et al. 2015

Handbook of Smart Textiles

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In recent decades, electrospinning of nanofibers has progressed very rapidly in both scientific and technological aspects, and electrospun nanofibers have shown enormous potential for various applications. In particular, electrospun nanofibers have significantly enhanced the application performance of many electronic devices, such as solar cells, mechanical-to-electric energy harvesters, rechargeable batteries, supercapacitors, sensors, field-effect transistors, diodes, photodetectors, and electrochromic devices. This chapter provides a comprehensive summary on the recent progress in the application of electrospun nanofibers in electronic devices.

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“…39 Combustion test of MPP separator and PSAP separator in air was shown in Figure 4. When MPP separator was set on fire, the separator shrank immediately and caught fire within short time (<3 s) (Figure 4a, 4c).…”

Section: -35mentioning

confidence: 99%

A Heat Resistant and Flame-Retardant Polysulfonamide/Polypropylene Composite Nonwoven for High Performance Lithium Ion Battery Separator

Zhang

Liu

et al. 2014

J. Electrochem. Soc.

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A heat resistant and flame-retardant polysulfonamide/polypropylene composite nonwoven has been developed and exploited as an advanced separator for high performance lithium ion battery via melt-blown spinning followed by a phase-inversion process. It was manifested that such composite nonwoven exhibited improved flame retardance, superior thermal resistance and better electrolyte wettability as compared to commercialized polypropylene separator. It was also demonstrated that the lithium cobalt oxide (LiCoO 2 )/graphite cells employing the composite separator possessed better rate capability and superior cycling stability than those of polypropylene separator. Furthermore, this study verified the beneficial impact of polysulfonamide/polypropylene composite separator with respect to commercial polypropylene separator on cycle performance of lithium iron phosphate (LiFePO 4 )/lithium (Li) cells even at an elevated temperature of 120 • C. These fascinating results suggest that such composite nonwoven is promising separator for high performance lithium ion battery. Lithium ion battery (LIB) is considered to be the most promising technology for electric vehicles and energy storage systems due to its high-energy density, high-specific energy, low self-discharge rate, and long lifetime cycle.1-5 Among the components in lithium ion battery, the separator is a critical component for battery performance and also crucial for battery safety. The separator separates positive electrode and negative electrode while permitting the rapid diffusion of lithium ions through electrolyte.6,7 Microporous polyolefin-based separators, such as polyethylene and polypropylene membranes, have been commercially used as major separators for LIB because of satisfactory mechanical property, excellent chemical stability and good thermal shutdown properties. [8][9][10] The thermal shutdown property of the microporous separators could cut off the thermal runaway at the shutdown temperature.6 However, the microporous polyolefin separators often suffered from severe thermal shrinkage above melting temperature when the elevated temperature kept a little long time, which could cause direct contact between cathode and anode and finally result in short circuit of lithium battery.11 Meanwhile, the microporous polyolefin separators have been proven to cause poor electrolyte wettability problems, which lead to an increase in cell resistance and would restrict the battery performance.12,13 Tremendous efforts have been made to improve the overall properties of commercial polyolefin separators.14-17 One strategy was to incorporate inorganic nanoparticles into microporous polyethylene membrane (PE) or polypropylene membrane (PP) and the other one was to coat high performance polymers onto commercial separator surface. As a matter of fact, ceramic nanoparticles coating suffered from insufficient adhesion to polymer matrix, which could lead to the particles detached from separators' surface and generate a non-uniform current density across the electrodes during c...

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

Cited by 50 publications

References 42 publications

Multicore-shell nanofiber architecture of polyimide/polyvinylidene fluoride blend for thermal and long-term stability of lithium ion battery separator

Multicore-shell nanofiber architecture of polyimide/polyvinylidene fluoride blend for thermal and long-term stability of lithium ion battery separator

Applications of Electrospun Nanofibers for Electronic Devices

A Heat Resistant and Flame-Retardant Polysulfonamide/Polypropylene Composite Nonwoven for High Performance Lithium Ion Battery Separator

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