Investigating polypropylene-poly(ethylene oxide)-polypropylene triblock copolymers as solid polymer electrolytes for lithium batteries

Young, Nicholas P.; Devaux, Didier; Khurana, Rachna; Coates, Geoffrey W.; Balsara, Nitash P.

doi:10.1016/j.ssi.2014.05.012

Cited by 68 publications

(42 citation statements)

References 61 publications

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“…Shim et al measured conductivity values around 10 −5 S cm −1 by using coreshell silica particles with ion-conducting poly(ethylene glycol) and anion-trapping boron moiety in the shell layer [31]. Young et al investigated polypropylene-poly(ethylene oxide)-polypropylene triblock copolymers as SPEs for lithium batteries and measured ionic conductivity values equal to 10 −5 S cm −1 at room temperature [32]. A similar value was also measured by Han et al with a crosslinked SPE fabricated by a solvent-free hot-pressing method adopting an ethylene oxide (EO)/LiN(SO 2 CF 3 ) 2 (LiTFSI) molar ratio of 20:1 [33].…”

Section: Resultsmentioning

confidence: 99%

Effect of lithium bis(trifluoromethylsulfonyl)imide salt-doped UV-cured glycidyl methacrylate

Radzir

Hanifah

Ahmad

et al. 2015

J Solid State Electrochem

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A study is carried out on solid polymer electrolytes (SPEs) based on UV-curable glycidyl methacrylate (GMA) reactive mixtures to determine the lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) effect at different weight percentages. These polymeric systems are discussed considering several factors such as chemical interaction, structural and thermal properties, ionic conductivity, and lithium transference number. Samples are prepared using solution casting technique and are analyzed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and electrochemical impedance spectroscopy (EIS) characterization methodologies. FTIR spectra show that interaction occurs between electronegative atoms in polymer host and TFSI − ions. XRD diffractogram indicates the amorphous aspect of SPEs, without the presence of LiTFSI peaks. Doping with LiTFSI salt reduces the glass transition temperature of SPEs and increased their ionic conductivity. Identified as the ideal salt concentration for poly(glycidyl methacrylate) (PGMA)-LiTFSI SPE system is 30 wt.% LiTFSI doping level, thus achieving a ionic conductivity of 3.69×10 −8 S cm −1 at ambient temperature and 1.23×10 −4 S cm −1 at 373 K. The ionic conductivity behavior obeys the Vogel-Tamman-Fulcher equation with an activation energy of 0.054 eV.

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Section: Resultsmentioning

confidence: 99%

Effect of lithium bis(trifluoromethylsulfonyl)imide salt-doped UV-cured glycidyl methacrylate

Radzir

Hanifah

Ahmad

et al. 2015

J Solid State Electrochem

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“…The representative examples are triblock copolymer of ethylene oxide/propylene oxide/ethylene oxide (PEO-PPO-PEO) 54,357 or PPO-PEO-PPE, 62 and triblock copolymer of styrene/ethylene oxide/styrene (PS-PEO-PS). 60,360 The synthesis procedures for the preparation of triblock copolymers containing linear PEO block are relatively complex and difficult.…”

Section: Linear Peo Copolymermentioning

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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“…A series of symmetric triblock copolymers composed of a central semi-crystalline PEO block and a semi-crystalline syndiotactic polypropylene (sPP) as the outer blocks (PEOP) were first synthesized by Young et al 47 PEOP was found to form strongly segregated morphologies when mixed with lithium bis(trifluoromethane) sulfonimide (LiTFSI). LiTFSI inhibited poly(ethylene oxide) crystallization without affecting the crystallinity of polypropylene.…”

Section: Amorphous Polymer Electrolytesmentioning

confidence: 99%

Review—On Order and Disorder in Polymer Electrolytes

Golodnitsky

Strauss

Greenbaum

2015

J. Electrochem. Soc.

206

135

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This contribution presents an overview of more than three-decades-long studies of the structure and mechanism of ion conduction in polyethylene-oxide-based solid polymer electrolytes. Conductivity in polymer electrolytes has long been viewed as confined to the amorphous phase above the glass-transition temperature (Tg). Above Tg, polymer chain motion creates a dynamic, disordered environment that was thought to play a critical role in facilitating ion transport. Difficulty of finding the amorphous polymer with sufficient ionic conductivity has raised the fundamental question of whether polymer electrolytes are intrinsically inferior to other electrolytes in terms of their charge-transport capability. Recently, enhanced ionic conductivity has been detected in ordered (longitudinally stretched and cast under gradient magnetic field) polymer electrolytes, in crystalline ion-polyether 1:6 complexes and polymer-in-salt electrolytes. These results have opened a new trend in the search for ion transport in solid polymer electrolytes. The very latest publications present new hybrid-and block-co-polymers, a new class of functional materials (polymerized ionic liquids), and new promising approaches aimed at the development of polymer-based superionic conductors with rigid nanochannel architectures that enable rapid ion transport decoupled from segmental relaxation. Solid Polymer Electrolytes-Structure and Mechanism of Ion TransportMuch research deals with high-ionic-conductive polymer electrolytes because of their current and potential applications as electrochromic and temperature-sensitive printed electronics devices, biomedical sensors, supercapacitors, solar cells and batteries. Polymer electrolytes offer pronounced advantages over conventional liquid electrolytes. These include: a versatile shape, mechanical strength and stable contact between the electrode and electrolyte interfaces. In addition, solid electrolytes are safer than liquid electrolytes as they do not have a leakage problem and because of their nontoxic, low-vaporpressure, and non-flammable properties. [1][2][3][4][5][6][7] Ion-polyether complexes (or polymer electrolytes) were first discovered by Fenton, Parker and Wright in 1973. 8 Since then, such complexes have been prepared with many different monatomic ions and indeed many different polymeric ligands. Armand in 1979 recognized that Li + -polyether complexes could be used as solid electrolytes in electrochemical devices. 9The classic polymer electrolyte comprises organic macromolecules (usually polyether polymer) that are complexed with inorganic salts. The polymer matrix must contain a Lewis base (e.g. ethylene-oxide unit, -OCH 2 CH 2 -) to solvate the lithium salt. The salt-solvent mixing entropy consists mainly of two components: translational and configurational. Contrary to the case of water, the mixing entropy for the formation of polymer electrolytes is small or even positive. The incorporation of salts into the polymer inevitably reduces the freedom of polymer-chain motion, thus causing ...

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Investigating polypropylene-poly(ethylene oxide)-polypropylene triblock copolymers as solid polymer electrolytes for lithium batteries

Cited by 68 publications

References 61 publications

Effect of lithium bis(trifluoromethylsulfonyl)imide salt-doped UV-cured glycidyl methacrylate

Effect of lithium bis(trifluoromethylsulfonyl)imide salt-doped UV-cured glycidyl methacrylate

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

Review—On Order and Disorder in Polymer Electrolytes

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