Hybrid separator containing reactive, nanostructured alumina promoting in-situ gel electrolyte formation for lithium-ion batteries with good cycling stability and enhanced safety

Ahn, Jun Hwan; You, Tae Sun; Lee, Sang Min; Esken, Daniel; Dehe, Daniel; Huang, Yisen; Kim, Dong Won

doi:10.1016/j.jpowsour.2020.228519

Cited by 37 publications

(18 citation statements)

References 52 publications

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“…The low resistance of hybrid membrane was related to the SiO2 coating. Low interfacial resistance with ceramic layer addition was also reported for polyolefin membranes (Ahn et al, 2020). Linear sweep voltammetry (LSV) curves are seen in Fig.…”

Section: Resultssupporting

confidence: 53%

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Cellulose based Hybrid Separators for High Performance Li-ion Batteries

Yanılmaz¹

2021

European Journal of Science and Technology

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Separators not only affect the safety but also electrochemical performance and they are important components in lithium ion batteries. Many researches have been conducted to fabricate separators with high electrochemical properties and high thermal stability. High porosity is important for high performance and thermal stability is vital for safety of the cells. Electrospinning can be used to produce nanofibers with high thermal stability and high porosity. Ceramic particles could also be used to improve electrochemical performance. Electro-spraying can be applied to incorporate ceramic nanoparticles in separators. Cellulose based hybrid nanofiber membrane separators were prepared via electrospinning and electro-spraying. Morphology and structural properties of hybrid separators were studied by using SEM, XRD and FTIR. N-butanol was used for porosity measurements. EIS were used for ionic conductivity and interfacial resistance studies. Electrochemical performance of the hybrid separators was also evaluated for use as separator membrane in lithium-ion batteries. It was found that cellulose hybrid nanofiber membranes had superior electrochemical performance with good electrochemical stability due to large porosity of nanofibers and electro-sprayed SiO2 nanoparticles. Large liquid electrolyte uptake of 240%, high electrochemical oxidation limit of over 4.5 V, and low interfacial resistance of 190 ohm•cm 2 with lithium were observed when hybrid membranes were used in Li/LiFePO4 cells. In addition, high cell capacities of above 160 mAh/g and good cycling performance were demonstrated.

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Section: Resultssupporting

confidence: 53%

“…High electrolyte uptakes was also reported for SiO2 containing polyvinyl alcohol membranes (Yanilmaz, 2020). Ahn et al (Ahn et al, 2020) also reported superior wettability with the addition of ceramic particles on PE membrane.…”

Section: Resultsmentioning

confidence: 73%

Cellulose based Hybrid Separators for High Performance Li-ion Batteries

Yanılmaz¹

2021

European Journal of Science and Technology

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“…In order to eliminate the adverse effects of external additives on battery performance, researchers also carried out a series of works using lithium salts as initiators of GPEs. 51,58 For example, He et al reported a novel hierarchical GPE based on the cationic polymerization of cyanoethyl polyvinyl alcohol (PVA-CN) initiated by PF 5 produced by the thermodecomposition of lithium hexafluorophosphate (LiPF 6 ) (6 in Table 1). 49 On the one hand, polyacrylonitrile (PAN)-based electrospun fiber membrane could enhance the mechanical strength and thermal stability of GPE.…”

Section: Thermochemical Polymerizationmentioning

confidence: 99%

In situ preparation of gel polymer electrolyte for lithium batteries: Progress and perspectives

Cui

Liu

et al. 2021

InfoMat

127

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The practical applications of Li-ion batteries (LIBs) are challenged by their safety concerns when using liquid electrolytes (LEs). Solid-state gel polymer electrolytes (GPEs) can address this challenge and have drawn increased attention recently. Normally, GPEs are prepared separately and then assembled into cells, which undoubtedly result in dissatisfactory solid/solid interfacial compatibility and low ionic conductivity. Fortunately, in situ GPEs are proposed to address the above challenges and simplify the preparation process. Typically, LE precursor is injected into the cells and gradually transformed into a quasisolid gel state under the conditions of thermal or chemical initiators. Consequently, the obtained in situ GPEs could fully infiltrate the electrode and better interface contact of gel electrolyte/electrode is thus inherited. In this review, the authors focus on the in situ GPEs used in lithium batteries (LBs), and summarize recent progress of the design, synthesis, and applications of in situ GPEs. Based on the different ways of triggering polymerization, there are mainly three methods: thermochemical gelation, polymerization by additional chemical initiators, and cross-linking initiated by Li O bond. Composite GPEs based on in situ solidification method are introduced as a promising strategy to improve the electrochemical performances. Finally, up-to-date research progresses are discussed, and perspectives are provided on the development and challenges of in situ GPEs to meet the requirements for their practical applications in LBs.

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“…The coin cell using gel polymer electrolyte reinforced membrane (16–21 µm thick) was assembled and evaluated and compared with the coin cell made by the commercial PE separator (15 µm thick) and liquid electrolyte. All the cells were measured over 50 cycles by 1.0 C-rate at room temperature using a charge/discharge life analyzer (PEBC050.1, PNE solution, (Suwon, Korea) [ 43 , 44 ].…”

Section: Methodsmentioning

confidence: 99%

A Gel Polymer Electrolyte Reinforced Membrane for Lithium-Ion Batteries via the Simultaneous-Irradiation of the Electron Beam

Jian

Park

et al. 2021

Membranes

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In this research, a series of innovative and stable cross-linked gel polymer reinforced membranes (GPRMs), were successfully prepared and investigated for application in lithium-ion batteries. Herein, a gel directly within the commercial polyethylene (PE) separator is supported via electron-beam simultaneous irradiation cross-linking of commercial liquid electrolyte and poly(ethylene glycol) methacrylate (PEGMA) oligomers. The physical and electrochemical properties of the GPRMs were characterized by SEM, TEM, mechanical durability, heating shrinkage, and ion conductivity, etc. The GPRMs demonstrated excellent mechanical durability and high ion conductivity compared with traditional PE membranes. Moreover, coin-typed cells were assembled and cycle performance was also studied compared with same-typed cells with commercial PE membrane and liquid electrolyte. As a result, the coin-typed cells using GPRMs also showed a relatively good efficiency on the 50th cycles at a high 1.0 C -rate. These GPRMs with excellent properties present a very promising material for utilization in high-performance lithium-ion batteries with improved safety and reliability.

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Hybrid separator containing reactive, nanostructured alumina promoting in-situ gel electrolyte formation for lithium-ion batteries with good cycling stability and enhanced safety

Cited by 37 publications

References 52 publications

Cellulose based Hybrid Separators for High Performance Li-ion Batteries

Cellulose based Hybrid Separators for High Performance Li-ion Batteries

In situ preparation of gel polymer electrolyte for lithium batteries: Progress and perspectives

A Gel Polymer Electrolyte Reinforced Membrane for Lithium-Ion Batteries via the Simultaneous-Irradiation of the Electron Beam

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