Preparation of PVDF based blend microporous membranes for lithium ion batteries by thermally induced phase separation: I. Effect of PMMA on the membrane formation process and the properties

Ma, Ting; Cui, Zhenyu; Wu, Ying; Qin, Shuhao; Wang, Hong; Yan, Feng; Han, Ning; Li, Jianxin

doi:10.1016/j.memsci.2013.05.028

Cited by 137 publications

(60 citation statements)

References 45 publications

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“…Separator adalah bahan isolasi elektrik yang telah direkayasa untuk memiliki pori-pori yang memungkinkan ion litium untuk berpindah diantara kedua elektroda baterai, baik saat proses pengisian (charging) maupun pengosongan (discharging). Fungsi utama dari separator adalah untuk memastikan terjadinya aliran ion dan mencegah terjadinya hubungan arus pendek di dalam sel baterai (Ma et al 2013).…”

Section: Pendahuluanunclassified

Karakteristik Morfologi Permukaan Pada Polimer PVdF-LiBOB-ZrO2 dan Potensinya untuk Elektrolit Baterai Litium

2018

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ABSTRAKKARAKTERISTIK MORFOLOGI PERMUKAAN PADA POLIMER PVdF-LiBOB-ZrO2 DAN POTENSINYA UNTUK ELEKTROLIT BATERAI LITIUM. Membran elektrolit polimer pada baterai litium ion berfungsi sebagai media transport ion dan sebagai separator antara anoda dan katoda. Dalam penelitian ini, telah dilakukan sintesis membran elektrolit polimer LiBOB (Lithium Bis Oksalato Borate dengan rumus kimia LiB(C2O4)2) dengan menggunakan Polyvilinidine fluoride (PVdF) sebagai matriks dan bahan aditif Zirkonium Oksida (ZrO2). Metoda yang dipergunakan adalah solution cast. Konsentrasi bahan aditif dibuat bervariasi. Membran yang terbentuk dikarakterisasi morfologi permukaan menggunakan Scanning Electrone Microscope (SEM), sifat elektrokimia dengan Cyclic Voltametric (CV) dan kapasitas baterai dengan kurva charge discharge. Hasil penelitian menunjukkan bahwa morfologi permukaan rantai polimer saling berikatan dan tersusun dengan bagus. Pori tertutup oleh rantai polimer secara rata yang berikatan membentuk jaring dan saling bertumpukan pada keadaan amorf. Terjadi reaksi oksidasi dan reduksi pada sel baterai dengan kapasitas charge sekitar 24 mAh pada tegangan 4 volt, sedangkan kapasitas discharge bernilai sama sekitar 24 mAh pada tegangan 4 volt dengan penambahan 10% ZrO2.

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Section: Pendahuluanunclassified

Karakteristik Morfologi Permukaan Pada Polimer PVdF-LiBOB-ZrO2 dan Potensinya untuk Elektrolit Baterai Litium

2018

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“…Similar results were also reported for electrospun PAN/PMMA nanofibers by Hong et al [25], who explained the decreased average fiber diameters by using the reduced solution viscosity and phase inversion that occurred at PMMA contents of 50 and 75 wt%. It has been well established that high porosity is beneficial for membrane separators because it helps absorb large amount of liquid electrolyte and allows fast ion transportation between two electrodes [23]. Table 1 presents the porosities of PMMA, PMMA/PAN (75/25), and PMMA/PAN (50/50) membranes.…”

Section: Separator Morphologymentioning

confidence: 99%

“…It is seen that PMMA and PMMA/PAN membranes exhibit the electrochemical oxidation limit of around 4.5 V while the electrochemical oxidation limit of the microporous PP membrane is 4.25 V. The electrochemical oxidation limit could be influenced by many factors, including electrolyte type and composition, electrode material and structure, and separator material and morphology, etc. [23]. When the electrolyte and electrode are fixed, the electrochemical oxidation limit could be affected by the interface between the electrolyte and the separator, which is related to the affinity between the separator and the liquid electrolyte, and the specific surface area and average fiber diameter of the separator [23,26,27].…”

Section: Electrochemical Oxidation Limitmentioning

confidence: 99%

“…[23]. When the electrolyte and electrode are fixed, the electrochemical oxidation limit could be affected by the interface between the electrolyte and the separator, which is related to the affinity between the separator and the liquid electrolyte, and the specific surface area and average fiber diameter of the separator [23,26,27]. Jung et al [26] reported increased electrochemical oxidation limit for PAN fibrous separators due to the good electrolyte absorption resulted from high specific surface area and thin fiber diameter.…”

Section: Electrochemical Oxidation Limitmentioning

confidence: 99%

“…Blending PAN and PMMA can potentially lead to new separators with enhanced microstructure, porosity and electrochemical properties that cannot be achieved by single-component polymer membranes. Different blend separators including PVDF/PMMA-co-PEGMA microporous separators [21], PVDF-co-HFP/PAN microporous membranes [22], PVDF/PMMA microporous membranes [19,23], electrospun PVDF/PAN membranes [18], and electrospun PVDF-HFP/PMMA [24] have been reported so far, and results demonstrated that blend separators have the advantages of improved electrolyte uptake, ionic conductivity, and cycling performance. In this work, centrifugal spinning was utilized to produce PAN/PMMA blend membranes for use as high-performance separator for Li-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

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Polymethylmethacrylate/Polyacrylonitrile Membranes via Centrifugal Spinning as Separator in Li-Ion Batteries

Yanılmaz

Zhang²

2015

Polymers

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Electrospun nanofiber membranes have been extensively studied as separators in Li-ion batteries due to their large porosity, unique pore structure, and high electrolyte uptake. However, the electrospinning process has some serious drawbacks, such as low spinning rate and high production cost. The centrifugal spinning technique can be used as a fast, cost-effective and safe technique to fabricate high-performance fiber-based separators. In this work, polymethylmethacrylate (PMMA)/polyacrylonitrile (PAN) membranes with different blend ratios were produced via centrifugal spinning and characterized by using different electrochemical techniques for use as separators in Li-ion batteries. Compared with commercial microporous polyolefin membrane, centrifugally-spun PMMA/PAN membranes had larger ionic conductivity, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. Centrifugally-spun PMMA/PAN membrane separators were assembled into Li/LiFePO4 cells and these cells delivered high capacities and exhibited good cycling performance at room temperature. In addition, cells using centrifugally-spun PMMA/PAN membrane separators showed superior C-rate performance compared to those using microporous polypropylene (PP) membranes. It is, therefore, demonstrated that centrifugally-spun PMMA/PAN membranes are promising separator candidate for high-performance Li-ion batteries.

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Fully Integrated Design of a Stretchable Solid‐State Lithium‐Ion Full Battery

et al. 2019

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a conventional battery, such as good electrochemical performance, affordable price, and high safety.A conventional full cell LIB is a complicated device, composed of a current collector, a cathode, an anode, a separator, an electrolyte, and a proper packaging. To fabricate a stretchable full cell, we need to replace all these components with materials that can provide simultaneously the appropriate electrochemical functionalities as well as the intrinsic mechanical stretchability. Many components that could potentially be used in a stretchable battery have been presented in the literature. For example, several approaches have been reported for fabricating stretchable electrodes by incorporating rigid electrode materials within a porous framework, with a wavy design, or with helically coiled spring configuration. [6] However, these structures are usually complicated and costly to produce and scale-up, and, due to the use of polydimethylsiloxane (PDMS) or other substrates, the cells are thick and heavy. [7] Also, stretchable composite conductors for applications in electronics have been widely investigated. [8] However, there are only very few reports targeting battery current collectors. [7,9] The sheet resistances of the reported materials range from around 150 to 200 Ω □ −1 in the unstretched states and get much higher when stretched, producing significant internal resistance. Polymer gel electrolytes (PGEs) composed of poly(vinylidene fluoride) (PVDF), [10] poly(ethylene glycol) (PEG), [11] poly(ethylene oxide) (PEO), [12] or poly(ionic liquid) [13] are widely accepted as promising solution for flexible LIBs due to their advantageous flexibility, safety, and packaging behavior compared to the liquid electrolytes with a porous separator. Unfortunately, PGEs usually show quite a low room temperature ionic conductivity that ranges from 10 −4 to 10 −3 S cm −1 . Since 2015, "water-in-salt" (WiS) aqueous electrolytes containing extremely concentrated lithium salt have been investigated. [14] Some of these WiS-based gel electrolytes have also been reported to show better safety and robustness compared with the conventional PGE. [15] However, none of these materials exhibited mechanical stretchability.It is interesting to note that although so many stretchable battery components have been reported, their processing into full cells is rarely described, and even in these cases, usually not all the LIB components were made stretchable. [7,16] The reason for this is the diffculty in obtaining robust conductive interfaces between the battery components enabling efficient ion and A solid-state lithium-ion battery, in which all components (current collector, anode and cathode, electrolyte, and packaging) are stretchable, is introduced, giving rise to a battery design with mechanical properties that are compliant with flexible electronic devices and elastic wearable systems. By depositing Ag microflakes as a conductive layer on a stretchable carbon-polymer composite, a current collector with a low sheet resistance of ≈2.7 Ω ...

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Preparation of PVDF based blend microporous membranes for lithium ion batteries by thermally induced phase separation: I. Effect of PMMA on the membrane formation process and the properties

Cited by 137 publications

References 45 publications

Karakteristik Morfologi Permukaan Pada Polimer PVdF-LiBOB-ZrO2 dan Potensinya untuk Elektrolit Baterai Litium

Karakteristik Morfologi Permukaan Pada Polimer PVdF-LiBOB-ZrO2 dan Potensinya untuk Elektrolit Baterai Litium

Polymethylmethacrylate/Polyacrylonitrile Membranes via Centrifugal Spinning as Separator in Li-Ion Batteries

Fully Integrated Design of a Stretchable Solid‐State Lithium‐Ion Full Battery

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