Thermostable and nonflammable polyimide/zirconia compound separator for lithium-ion batteries with superior electrochemical and safe properties

Li, Yong; Liu, Kefan; Yan, Yue; Yu, Junfeng; Dong, Nianguo; Liu, Bingxue; Tian, Guofeng; Qi, Shengli; Wu, Dezhen

doi:10.1016/j.jcis.2022.06.096

Cited by 22 publications

(10 citation statements)

References 50 publications

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“…Consequently, the corresponding separator can absorb and retain an increased quantity of the electrolyte, leading to enhanced battery capacity and superior cycle performance. 45 The discharge curves of batteries assembled with the test separators are shown in Figure 6b−e. The ratio of discharge specific capacity above 3.0 V to total discharge specific capacity, noted as DA3.0, is applied to assess the highpotential discharge performance of the battery.…”

Section: Resultsmentioning

confidence: 99%

Heat-Resistant Lithium-Ion-Battery Separator Using Synchronous Thermal Stabilization/Imidization

Yu,

Chen,

Jin

et al. 2024

ACS Appl. Polym. Mater.

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Separators significantly impact the safety and electrochemical properties of lithium-ion batteries (LIBs). However, the commonly used microporous polyolefin-based separators encounter inferior thermal stability and electrolyte wettability. Herein, a heat-resistant porous preoxidized polyacrylonitrile/ polyimide (OPAN/PI) composite nanofiber separator is successfully fabricated through synchronous thermal stabilization/imidization based on a polyacrylonitrile/polyamide acid (PAN/PAA) nanofiber membrane. The incorporation of PI significantly enhances the separator tensile strength by 79.89%, reaching 6.26 MPa. Furthermore, this hybrid separator exhibits splendid thermal dimensional stability (no shrinkage observed at 300 °C for 30 min) and flame-retardant performances, ensuring battery safety. The OPAN/PI separator demonstrates high porosity (78.4%), excellent electrolyte uptake (511.3%), and superior electrolyte wettability because of the intrinsic polar groups and porous structure, leading to enhanced ionic conductivity (1.853 mS/cm) and reduced interfacial resistance (188.4 Ω) compared to the Celgard separator. Furthermore, the LiFePO 4 /Li battery utilizing the OPAN/PI separator shows an admirable initial discharge specific capacity of 150.4 mAh g −1 and a surprising capacity retention ability of 101.0% after 100 cycles at 1C. Therefore, the OPAN/PI separator has great potential as an alternative separator for high-safety LIBs.

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Section: Resultsmentioning

confidence: 99%

Heat-Resistant Lithium-Ion-Battery Separator Using Synchronous Thermal Stabilization/Imidization

Yu,

Chen,

Jin

et al. 2024

ACS Appl. Polym. Mater.

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“…Ionic conductivity was analyzed using electrochemical impedance spectroscopy (EIS) analysis of batteries with two stainless steel (SS) plates as electrodes. The ionic conductivity can be calculated by the following formula δ = d R normalb × S where Rb, S, and d refer to the bulk resistance (ohm), thickness (cm) of different separators, and effective acreage, respectively …”

Section: Methodsmentioning

confidence: 99%

“…where Rb, S, and d refer to the bulk resistance (ohm), thickness (cm) of different separators, and effective acreage, respectively. 33 The electrochemical stability of the separator was characterized by scanning voltammetry with a scanning rate of 10 mV/s and a voltage scanning range of 1.5−6.5 V. The battery component was a Li/ separator impregnated with electrolyte/SS.…”

Section: Characterizationmentioning

confidence: 99%

Coaxial Electrospun Tai Chi-Inspired Lithium-Ion Battery Separator with High Performance and Fireproofing Capacity

Zeng,

Shao,

Shen

et al. 2023

ACS Appl. Mater. Interfaces

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Organic flame-retardant-loaded battery separator offers a new opportunity for battery safety. However, its poor thermal stability still poses serious safety issues. Inspired by Tai Chi, an "internal-cultivating and external-practicing" core−shell nanofibrous membrane was prepared by coaxial electrospinning, wherein the shell layer was a mixture of polyvinylidene fluoride, silicon dioxide (SiO 2 ), and graphene oxide (GO) and the core layer contained triphenyl phosphate (TPP). SiO 2 and GO enhanced the thermal stability and electrochemical performance. The encapsulated TPP prevented heat transfer and the degradation of electrochemical performance caused by its direct dissolution. This separator exhibited outstanding thermal stability and flame retardancy: it did not burn and remained relatively intact (91.2%) in an open flame for 15 s. The battery assembled with a composite separator showed excellent performance: the initial capacity reached 164 mA h/g and maintained 95% after 100 charge− discharge cycles. This novel strategy endows high-performance lithium batteries with relatively higher safety.

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“…[92] The thickness of the separators typically varies between 25 and 40 µm, depending on the type of battery, they show a degree of porosity larger than 40% with an average pore size below 1 µm and are stable at temperatures up to 150 °C. Additionally, to improve the thermal and mechanical properties and wettability of the conventional separators based on PE and PP, new separators based on covalent organic framework (COF) into poly(arylene ether benzimidazole) (OPBI), [93] polyacrylonitrile (PAN) composite separators with cellulose acetate and nano-hydroxyapatite, [94] PAN with aluminum diethylphosphinate (ADEP), [95] polyimide (PI) polymer, [96] PI with polyethylene oxide (PEO) processed by electrospinning technique, [97] PI with zirconia (ZrO 2 ), [98] PI with graphene, [99] PI with hexagonal boron nitride, [100] PI with nano-tiO 2 , [101] PI with organic montmorillonite (OMMT), [102] PEO with para-aramid nanofibers (ANFs), [103] PVDF/SiO 2 , [104] poly(ethylene glycol) diacrylate (PEGDA), [105] polyurethane separator coated Al 2 O 3 particles, [89a] and poly(vinyl alcohol) with nano architecture halloysite nanotubes (NHNTs) composite separator (OPVA/NHNTs separator, [106] and new coatings of boehmite (γ-AlO(OH)) nanofibers, [107] inorganic oxide solid electrolyte layers (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , LATP), [108] SiO 2 with acrylamide (AM), [81a] Ca 3 (PO 4 ) 2 inorganic layer, [91] polyimide microsphere, [109] and plasma treatment plus zwitterion grafting [110] were developed. Further, it has been also explored the replacement of these synthetic polymers by natural polymers such as, natural wood, [111] cellulose, [96,112] silk fibroin, [113] silk fibroin with sericin, [114] poly(vinyl alcohol) (PVA), [115] lignin, [116] carrageenan, [117] among others.…”

Section: Battery Separators: Main Role and Relevant Propertiesmentioning

confidence: 99%

Overview on Theoretical Simulations of Lithium‐Ion Batteries and Their Application to Battery Separators

Miranda

Gonçalves

Wuttke

et al. 2023

Advanced Energy Materials

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For the proper design and evaluation of next‐generation lithium‐ion batteries, different physical‐chemical scales have to be considered. Taking into account the electrochemical principles and methods that govern the different processes occurring in the battery, the present review describes the main theoretical electrochemical and thermal models that allow simulation of the performance of lithium‐ion batteries, including different materials and components (electrodes and separators) and battery geometries. As the separator plays an essential role in the performance and safety of lithium‐ion batteries, the recent theoretical simulation work for this battery component are shown, with particular emphasis on morphology, dendrite growth, ionic transport, and mechanical properties. Further theoretical simulations and modeling of this battery component are still required for improving performance, taking into consideration varying geometric parameters such as pore size, porosity, and tortuosity as well as the optimization of the lithium diffusion process and ionic conductivity value. Theoretical simulations of battery separators will play an essential role in the new generation of lithium‐ion batteries, allowing the improvement of their performance while reducing experimental probes and time.

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Thermostable and nonflammable polyimide/zirconia compound separator for lithium-ion batteries with superior electrochemical and safe properties

Cited by 22 publications

References 50 publications

Heat-Resistant Lithium-Ion-Battery Separator Using Synchronous Thermal Stabilization/Imidization

Heat-Resistant Lithium-Ion-Battery Separator Using Synchronous Thermal Stabilization/Imidization

Coaxial Electrospun Tai Chi-Inspired Lithium-Ion Battery Separator with High Performance and Fireproofing Capacity

Overview on Theoretical Simulations of Lithium‐Ion Batteries and Their Application to Battery Separators

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