A new class of polymer electrolytes based on chain-extended polyepoxides and LiClO4

Marchese, Luca; Mihai, Andrei; Roggero, A.; Passerini, Stefano; Prosperi, P.; Scrosati, B.

doi:10.1016/0013-4686(92)80111-x

Cited by 35 publications

(28 citation statements)

References 9 publications

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“…3 , was obtained from Gelest, Inc. (x = 6-9, 90% purity) [referred to as PEO(375)-silane, since 375 was the average molecular weight calculated for the PEO segment, assuming one of the three CH 2 groups between the PEO and Si belong to the PEO moiety].…”

Section: Methodsmentioning

confidence: 99%

“…Use of low molar mass polyethylene glycol dimethyl ethers (PEGDMEs) as plasticizers (30-40%) in the PEO matrix increased ambient temperature conductivities, but at the cost of significant reduction in the mechanical and interfacial properties [1]. Other approaches to increasing the room temperature (RT) conductivity of polyether electrolytes are by attachment of short-chain PEO oligomers as side chains to flexible [2][3][4][5][6][7][8][9][10] or rigid polymer backbones [11,12], network polyethers [13,14] and inorganic scaffolds [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

2008

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

2008

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“…Recently, comb-like polymers with oligomeric PEO in their side chains have attracted interest for use in polymer electrolytes [6][7][8][9][10][11]. Since the pendant PEO side chains alter the matrix flexibility, fast side-chain motion increases the mobility of the dissolved ions and thus improves their conductivity.…”

Section: Introductionmentioning

confidence: 99%

Comb-like copolymer-based gel polymer electrolytes for lithium ion conductors

Liang¹,

Wang²,

Chen³

2008

Journal of Power Sources

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“…[6][7][8][9] To suppress crystallinity and increase segmental mobility of the ethylene oxide chain, PEO-based compounds with polysiloxane 6 or polyurethane 10 and branched 11 or hyperbranched ether chain 12,13 and with cross-linked networks 14,15 have been studied. These polymers need to eliminate byproducts produced in polymerization or catalysts used for polymerization which have adverse effect on their electrochemical properties.…”

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confidence: 99%

New Type Polymer Electrolytes Based on Bis-Oxetane Monomer with Oligo(ethylene oxide) Units

Miwa

Tsutsumi

Oishi

2001

Polym J

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A new procedure for preparing of polymer electrolytes based on ring-opening polymerization of bis-oxetane derivatives [1,9-bis(3-ethyl-3-oxetanyl)-2,5,8-trioxanonane (DDOE), 1,12-bis(3-ethyl-3-oxetanyl)-2, 5,8,, and 1,15-bis(3-ethyl-3-oxetanyl)-2,5,8,11,14-hexaoxapentadecane (TeDOE)] having oligoethylene oxide (EO) chain was carried out with lithium salts [LiPF 6 , LiBF 4 , and LiN(C 2 F 5 SO 3 ) 2 ] as a polymerization catalyst. Addition of a polar solvent such as acetone or acetonitrile ("retarding" solvent) to the monomer-lithium salt mixture was effective in regulating the polymerization rate. The polymer electrolytes were characterized by infrared spectroscopy, differential scanning calorimetory (DSC), dynamic mechanical spectroscopy, X-Ray diffraction measurement, and alternating current impedance spectroscopy. The polymer electrolytes obtained with LiBF 4 were free-standing and dimensionally stable films and indicated high conductivity (2.8 × 10 −5 S cm −1 at 30 • C) as solvent-free polymer electrolytes. Conductivity of the poly(oxetane)-LiBF 4 complexes was found to depend on the amount of LiBF 4 , the kind of "retarding" solvent (acetone or acetonitrile) and length of oligo-EO chain in the bis-oxetane monomer. Maximum conductivity of the complexes acquired from the LiBF 4 -acetone solution of DDOE, TrDOE, and TeDOE revealed 2.7 × 10 −5 , 2.0 × 10 −5 , and 1.8 × 10 −5 S cm −1 at 30 • C, and from LiBF 4 -acetonitrile solution, 7.6 × 10 −7 , 1.6 × 10 −6 , and 2.8 × 10 −5 S cm −1 at 30 • C, respectively. DSC and dynamic mechanical spectroscopy of the polymer electrolytes suggested that the network structures in the electrolytes were influenced by the polar solvent.KEY WORDS Ring-Opening Polymerization / Polymer Electrolyte / Lithium Salts / Oxetane / The need for light-weight and high-energy rechargeable batteries has been increasing for electronic devices and electric vehicles. 1, 2 In particular, lithium rechargeable batteries have high energy density compared to other conventional secondary cells such as nickel-cadmium and nickel-hydrogen. Application of polymer electrolytes to the secondary lithium batteries has been extensively studied due to their good mechanical, chemical, and electrochemical stability. Polymer batteries were prepared by interposing polymer electrolyte membranes between anode and cathode for lithium salt dissolution and lithium ions transfer as well as the electrode separator. Polymer cells provide shape in desirable design and safety in mechanical and thermal shock.To obtain polymer electrolytes with high conductivity, investigation on polymer electrolytes having large segmental motion and facile ion transport has been extensively carried out. 3-5 A number of studies has been devoted particularly to poly(ethylene oxide) (PEO) with desirable coordination of the lithium ion to the ether oxygen atom in oligo-ethylene oxide (EO) chain. With a PEO-based electrolyte, a semicrystalline material and the crystalline complex with lithium salt † To whom correspondence should be addressed.shows ...

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A new class of polymer electrolytes based on chain-extended polyepoxides and LiClO4

Cited by 35 publications

References 9 publications

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

Comb-like copolymer-based gel polymer electrolytes for lithium ion conductors

New Type Polymer Electrolytes Based on Bis-Oxetane Monomer with Oligo(ethylene oxide) Units

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