A high-temperature stable composite polyurethane separator coated Al2O3 particles for lithium ion battery

Cheng, Chu-Yun; Liu, Hangzhong; Ouyang, Chuying; Hu, Naigen; Zha, Guojun; Hou, Haoqing

doi:10.1016/j.coco.2022.101217

Cited by 17 publications

(12 citation statements)

References 16 publications

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“…It is because the OPAN/PI nanofiber separator has excellent electrolyte wettability, which leads to an increased voltage during the oxidation reaction between the electrolyte and lithium electrode, as a result of excellent stability with the negative electrode. 53 The electrochemical stability window test by linear sweep voltammetry is presented in Figure 5e, revealing that the PAA series separators demonstrate voltage onsets of irreversible electrolyte degradation at approximately 4.5−4.7 V versus Li + / Li. All samples exhibit superior performance compared to the Celgard separator.…”

Section: Resultsmentioning

confidence: 99%

“…Compared to PAA-0, the interface resistance of PAA-20 and PAA-40 decreased to 212.1 and 188.4 Ω, respectively. It is because the OPAN/PI nanofiber separator has excellent electrolyte wettability, which leads to an increased voltage during the oxidation reaction between the electrolyte and lithium electrode, as a result of excellent stability with the negative electrode …”

Section: Results and Discussionmentioning

confidence: 99%

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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%

Section: Results and Discussionmentioning

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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“…The thermal stability of the separator is critical for the migration of ions in LIBs and to keep stable the separator morphology, as dimensional variations by compression decrease the ion transport channels and their migration, decreasing the value of the discharge capacity. [84] Separators are typically manufactured based on polymer materials, the most used being polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC)), and polyvinylidene fluoride (PVDF) and co-polymers and different processing techniques such as wet processes and dry processes such as extrusion, [85] electrospinning, [86] nonwoven techniques, [87] atomic layer deposition, [88] solvent casting with thermally induced phase separation, [89] and non-solvent phase separation processes (NIPS), [90] among others [91] where its surface can be modified by plasma treatment. [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.…”

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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“…These improve the long-term performance and ionic conductivity of lithium-ion batteries [18]. This ceramic coating improves polyolefin separators' thermal stability and conductivity, increasing battery safety and efficiency [19][20]. The Al2O3 coating reduces temperature rise by 20% and offers better thermal stability, mechanical properties, and liquid absorption than commercial separators.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Performance of Solid Polymer Electrolyte Separator Lithium Battery with Cellulose Acetate From Empty Palm Fruit Bunch Coated Al2O3-Polyacrylic Acid

Ginting,

Perdana,

Syahputra

et al. 2023

J. Penelit. Fis. Apl.

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As lithium battery technology improves, it becomes more important to have solid polymer electrolyte dividers that work better. The objective of this study is to enhance the efficiency of solid polymer electrolyte separators in lithium batteries. This research aims to expand the limits of innovation in hybrid separator development by utilizing empty palm fruit bunches (OPFEB) as a plentiful source of cellulose acetate. This approach enhances ion transfer by increasing the number of pores in the separator. However, there are challenges to achieving the desired levels of optimal ionic conductivity. In order to address these constraints, this study presents a novel Al2O3-PAA inert ceramic oxide coating treatment that is applied to the separator by a spin coating technique. An electron microscope was utilized to observe the pore structure of the separator. Additionally, the separator underwent physical, mechanical, thermal, and cyclic voltammetry tests. The findings of this research indicate a significant increase in the physical properties, particularly the porosity and mechanical strength. The thermal shrinkage of the Al2O3-PAA coated separator is below 10% when exposed to a temperature of 140 oC for 30 minutes. The Cyclic Voltammetry test results demonstrate a pronounced loop curve, indicating an improvement in the ionic conductivity of the Al2O3-PAA coated separator. The findings of this study provide a method to enhance the efficiency of separator performance at high temperatures while maintaining safety and long battery life.

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A high-temperature stable composite polyurethane separator coated Al2O3 particles for lithium ion battery

Cited by 17 publications

References 16 publications

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

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

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

Enhanced Performance of Solid Polymer Electrolyte Separator Lithium Battery with Cellulose Acetate From Empty Palm Fruit Bunch Coated Al2O3-Polyacrylic Acid

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