Effects of an electrospun fluorinated poly(ether ether ketone) separator on the enhanced safety and electrochemical properties of lithium ion batteries

Li, Hai; Zhang, Bin; Liu, Wei; Lin, Bin; Ou, Qingqing; Wang, Hao; Fang, Mingliang; Liu, Dong; Neelakandan, Sivasubramaniyan; Wang, Lei

doi:10.1016/j.electacta.2018.08.075

Cited by 49 publications

(28 citation statements)

References 42 publications

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“…These results are consistent with the results of the contact angle test. In general, the higher electrolyte uptake leads to higher ionic conductivity, which has been reported in previous literature [26,28,30]. As shown in Figure 7a, the ionic conductivities are considered to be 0.72 mS cm −1 for PP separator, 0.9 mS cm −1 for PI separator, and 1.04 mS cm −1 for Z/PI-10 separator, which has the similar trends as the electrolyte uptake.…”

Section: Resultssupporting

confidence: 73%

“…DSC was carried out to evaluate the thermal behaviors of the prepared separators. From the DSC profile of the PP separator, shown in Figure 4a, an obvious endothermic peak at about 167 • C is detected, which is the melting temperature of PP [25,26]. In contrast, no obvious peaks are observed in the range of 50-300 • C for both the pristine PI separator and Z/PI-10 composite separator, and there is a negligible difference among the PI separator and Z/PI-10 composite separator, indicating that the PI-based separators possess significant thermal stability up to 300 • C. Meanwhile, to further evaluate the thermal behaviors of the separators, a TGA test was performed, and the results are shown in Figure 4b.…”

Section: Resultsmentioning

confidence: 99%

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Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

Wang

Liang

et al. 2020

Polymers

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A zeolite/polyimide composite separator with a spongy-like structure was prepared by phase inversion methods based on heat-resistant polyimide (PI) polymer matrix and ZSM-5 zeolite filler, with the aim to improve the thermal stability and electrochemical properties of corresponding batteries. The separator exhibits enhanced thermal stability and no shrinkage up to 180 °C. The introduction of a certain number of ZSM-5 zeolites endows the composite separator with enhanced wettability and electrolyte uptake, better facilitating the free transport of lithium-ion. Furthermore, the composite separator shows a high ionic conductivity of 1.04 mS cm−1 at 25 °C, and a high decomposition potential of 4.7 V. Compared with the PP separator and pristine PI separator, the ZSM-5/PI composite separator based LiFePO4/Li cells have better rate capability (133 mAh g−1 at 2 C) and cycle performance (145 mAh g-1 at 0.5 C after 50 cycles). These results demonstrate that the ZSM-5/PI composite separator is promising for high-performance and high-safety lithium-ion batteries.

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Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

Wang

Liang

et al. 2020

Polymers

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“…Although high safety and performance separators were obtained, the structure of soluble PAEK was difficult to control. Alternatively, Wang et al reports the fabrication of separator by solution electrospining based on soluble PAEK polymers, the process can be easily scaled up 20–23 . All the separators exhibited excellent thermal stability, and the separators based on PAEK copolymers with fluoroinated and methylated structure exhibited the best electrochemical properties, which was similar to the previously reported fluorinated polymeric separators (poly(vinylidene fluoride), PVDF; poly(vinylidene fluoride‐co‐hexafluoropropylene), P(VDF‐HFP) et al) and might be attributed to the compatibility of fluoro with the electrolyte 24–27 …”

Section: Introductionsupporting

confidence: 63%

Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

Zhi-bin

Chen

Huo

et al. 2021

J of Applied Polymer Sci

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To improve the safety and electrochemical properties of lithium ion batterie (LIB), a series of novel organic soluble poly(aryl ether ketone) (PAEK) copolymers were synthesized and used to fabricate LIB separators. The PAEK copolymers exhibited superior structural thermal stability and flame retardant, with glass transition temperature (Tg) above 150°C, oxygen index above 30 and no thermal decomposition before 500°C. Accordingly, the fabricated separators exhibited superior dimensional stability. The mechanical properties and electrolyte uptakes of the separators, as well as the electrochemical properties of the cells assembled with the separators were affected by the morphology and porosity of the separators. The separators with sponge‐like structure exhibited less electrolyte uptakes but better mechanical properties than that of the ones with finger‐like structure. The cell with finger‐like structure separator exhibited poorer electrochemical properties than sponge‐like structure separator, which might be caused by the collapse of some finger hole during the assemble process due to its poor mechanical properties. The charge–discharge performances of the cells after treated at 150°C demonstrates that the PAEK separators could be promising candidates for high‐safety LIB.

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“…Considering their vital role in high performance LIBs, tremendous efforts have been devoted on them, either on thermal stability improvement (Mohanty et al, 2016;Jiang et al, 2017;Liu et al, 2017aLiu et al, , 2018bLi et al, 2018b), or ion transport capability enhancement (low MacMullin number, N m ) (Jayaraman and Schweizer, 2009;Dahbi et al, 2012;Kirchhofer et al, 2014;Keyser et al, 2017;Ma et al, 2018). With the respect of safety performance, many works concentrated on ceramic coating (Mohanty et al, 2016;Shi et al, 2016;Jiang et al, 2017) or polymer matrix optimization (Jayaraman and Schweizer, 2009;Liu et al, 2017aLiu et al, , 2018bLi et al, 2018b). Micro or nano sized Al 2 O 3 and SiO 2 are believed to be the optimal candidates for ceramic coating, not only for their thermal stability, HF scavenging ability, but also for their ease of mass production.…”

Section: Polymer Separatorsmentioning

confidence: 99%

Safety Issues in Lithium Ion Batteries: Materials and Cell Design

et al. 2019

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As the most widely used energy storage device in consumer electronic and electric vehicle fields, lithium ion battery (LIB) is closely related to our daily lives, on which its safety is of paramount importance. LIB is a typical multidisciplinary product. A tiny single cell is composed of both organic and inorganic materials in multi scale. In addition, its relatively closure property made it difficult to be studied on line, let alone in the battery pack or system level. Safety, often manifested by stability on abuse, including mechanical, electrical, and thermal abuses, is a quite complicated issue of LIB. Safety has to be guaranteed in large scale application. Here, safety issues related to key materials and cell design techniques will be reviewed. Key materials, including cathode, anode, electrolyte, and separator, are the fundamental of the battery. Cell design and fabrication techniques also have significant influence on the cell's electrochemical and safety performances. Here, we will summarize the thermal runaway process in single cell level, and some recent advances on battery materials and cell design.

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Effects of an electrospun fluorinated poly(ether ether ketone) separator on the enhanced safety and electrochemical properties of lithium ion batteries

Cited by 49 publications

References 42 publications

Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

Safety Issues in Lithium Ion Batteries: Materials and Cell Design

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