Effects of siloxane nanoparticles on glass transition temperature and crystallization in PEO-LiPF6 polymer electrolytes

Cho, Sanghyeok; Cha, Wonsuk; Park, Hyun-jun; Lee, Jungmin; Kim, Eun-Bee; Rhee, Hee‐Woo; Jiang, Zhang; Strzalka, Joseph; Kim, Hyun-Jung

doi:10.1016/j.synthmet.2013.06.020

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…Further addition of salt decreased the conductivity; this might be explained on the basis of ion association and charge multiplet formation. This type of behavior of conductivity in PEO-based solid polymer electrolytes has been explained clearly by various researchers [26,37,52,53].…”

Section: Conductivity Studiesmentioning

confidence: 54%

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Polu

Kim

Rhee

2015

Ionics

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Solid polymer electrolytes based on high molecular weight poly(ethylene oxide) (PEO) complexed with lithium difluoro(oxalato)borate (LiDFOB) salt in various EO:Li molar ratios from 30:1 to 8:1 were prepared by using solution casting technique. Ion-polymer interaction, structural, thermal, and ionic conductivity studies have been reported by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), polarized optical microscopy (POM), differential scanning calorimeter (DSC), and impedance analysis. FTIR spectral studies suggested that the interaction of Li + cations with the ether oxygen of PEO, where a triple peak broad band centered at 1105 cm −1 , corresponds to C-O-C stretching and extreme deformation occurs. XRD, POM, and DSC indicated that the inclusion of LiDFOB salt could reduce the crystallinity of PEO. The melting temperature of PEO shifted to lower temperature side by the addition of LiDFOB. The glass transition temperature obtained for the system 10:1 was −38.2°C. An increase in the ionic conductivity from 3.95×10 −9 to 3.18× 10 −5 S/cm at room temperature (23°C) was obtained through the addition of LiDFOB to a high molecular weight PEO. In addition, the ionic conductivity of the polymer electrolyte films followed an Arrhenius relation, and the activation energy decreased with increasing LiDFOB concentration.

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Section: Conductivity Studiesmentioning

confidence: 54%

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Polu

Kim

Rhee

2015

Ionics

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“…Other than metal oxides, many additives were also employed in the PEO-based electrolytes for improving the properties of the polymer electrolytes, such as LiAlO 2 , 147,220,245,289-293 BaTiO 3 , 231,243,[294][295][296] montmorillonite clay (MMT), 297,298 molecular sieves, 299 silicate, 300,301 SiC, 231,302 291,292 siloxane or siloxane compounds, 153,308 polyphosphazene nanotubes, 309 silica aerogel powder, 250 and lithium aluminum germanium phosphate (LAGP). 310 Among these inorganic llers, LiAlO 2 is an effective ller for PEO-based electrolyte systems.…”

Section: Ionic Conductivity In Libsmentioning

confidence: 99%

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

2015

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This article reviews the PEO-based electrolytes for lithium-ion batteries.Poly(ethylene oxide) (PEO) based materials are widely considered as promising candidates of polymer hosts in solid-state electrolytes for high energy density secondary lithium batteries. They have several specific advantages such as high safety, easy fabrication, low cost, high energy density, good electrochemical stability, and excellent compatibility with lithium salt. However, the typical linear PEO does not reach the production requirement because its insufficient ionic conductivity due to the high crystallinity of the ethylene oxide (EO) chains, which can restrain the ionic transition due to the stiff structure especially at low temperature. The scientists have explored different approaches to reduce the crystallinity hence to improve the ionic conductivity of PEO-based electrolytes, including: blending, modifying and making PEO derivatives etc. This review is focused on surveying the recent developments and issues about PEO-based electrolytes for lithium-ion batteries.

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“…[85][86][87] Besides, siloxanes have been adopted as a bridge for 3D cross-linked gel polymer electrolytes to increase the ion mobility by increasing the amorphous area. [88][89][90] In short, micromolecular silane and siloxane are competitive alternatives for liquid electrolytes due to their own characteristics.…”

Section: Micromolecule Silane and Siloxanementioning

confidence: 99%

Organosilicon‐Based Functional Electrolytes for High‐Performance Lithium Batteries

Wang

Chen

et al. 2021

Advanced Energy Materials

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Nowadays excessive consumption of fossil fuels due to population growth and industrial development induced serious energy and environmental crisis. To alleviate the ecological crisis and comply with the ever-increasing energy demand, developingThe electrolyte has been considered as a key factor toward higher energy density for Li-ion and Li-metal batteries. However, conventional electrolytes suffer from uncontrolled interfacial reactions and irreversible decomposition causing performance deterioration and potential safety hazard. Organosilicon compounds have attracted great interest as promising electrolyte components due to facile chemical modifications, low glass transition temperatures (T g ), superior chemical, and thermal stabilities. Considerable investigation efforts have been devoted to developing better overall performance of organosilicon-based electrolytes in the past few years. Herein, the recent research progress of organosilicon-based functional electrolytes for the development of liquid, gel, and solid state electrolytes in Li-ion and Li-metal batteries is summarized. Attention is devoted to various types of organosilicon such as silane, siloxane, polysiloxane, and polyhedral oligomeric silsesquioxanes in terms of molecular design, ionic conductivity, functions shown in batteries, thermal, chemical, electrochemical stability, safety, etc. The feasible strategies are also discussed that may promote the comprehensive electrochemical performances of organosilicon-based electrolytes in different types of electrolytes and batteries. Finally, the challenges facing organosilicon-based electrolytes and proposed their possible solutions are presented alongside promising development directions.

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Effects of siloxane nanoparticles on glass transition temperature and crystallization in PEO-LiPF6 polymer electrolytes

Cited by 10 publications

References 17 publications

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

Organosilicon‐Based Functional Electrolytes for High‐Performance Lithium Batteries

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