Ionic conductivity of polymer electrolyte membranes based on polyphosphazene with oligo(propylene oxide) side chains

Kaskhedikar, N.; Paulsdorf, J.; Burjanadze, M.; Karatas, Yunus; Wilmer, D.; Roling, Bernhard; Wiemhöfer, Hans‐Dieter

doi:10.1016/j.ssi.2006.01.011

Cited by 25 publications

(23 citation statements)

References 28 publications

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“…Figure 2 contains conductivity data of JAPP, a polyphosphazene with long polypropylene oxide sidechains bound to the phosphorous of the polyphosphazene via a terminal amino group (cf . Scheme 5) [39]. The average molar mass of the side group alone is 500 g/mol.…”

Section: Methodsmentioning

confidence: 99%

Salt-in-Polymer Electrolytes for Lithium Ion Batteries Based on Organo-Functionalized Polyphosphazenes and Polysiloxanes

Burjanadze

Karatas

Kaskhedikar

et al. 2010

Zeitschrift Für Physikalische Chemie

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An overview is given on polymer electrolytes based on organo-functionalized polyphosphazenes and polysiloxanes. Chemical and electrochemical properties are discussed with respect to the synthesis, the choice of side groups and the goal of obtaining membranes and thin films that combine high ionic conductivity and mechanical stability. Electrochemical stability, concentration polarization and the role of transference numbers are discussed with respect to possible applications in lithium batteries. It is shown that the ionic conductivities of salt-in-polymer membranes without additives and plasticizers are limited to maximum conductivities around 10 −4 S/cm. Nevertheless, a straightforward strategy based on additives can increase the conductivities to at least 10 −3 S/cm and maybe further. In this context, the future role of polymers for safe, alternative electrolytes in lithium batteries will benefit from concepts based on polymeric gels, composites and hybrid materials. Presently developed polymer electrolytes with oligoether sidechains are electrochemically stable in the potential range 0-4.5 V (vs. Li/Li + reference).

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Section: Methodsmentioning

confidence: 99%

Salt-in-Polymer Electrolytes for Lithium Ion Batteries Based on Organo-Functionalized Polyphosphazenes and Polysiloxanes

Burjanadze

Karatas

Kaskhedikar

et al. 2010

Zeitschrift Für Physikalische Chemie

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“…The total conductivity of our polysiloxane based electrolytes was shown in Fig. 3 for the relevant temperature range, as measured by standard impedance spectroscopy (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). In conventional liquid electrolytes, the lithium transference numbers reach values near or slightly lower than 0.5.…”

Section: Lithium Transference Numbersmentioning

confidence: 98%

“…Figure 1. Polysiloxane PSx-[P(EO) 3 OMe] 87.5% [PSi(OMe) 3 )] 12.5% with 12.5 wt.-% Si(OMe) 3 linking groups and 87.5 wt.-% oligoether, linking leads to formation of Si-O-Si bonds between the Si(OMe) 3 groups (13).…”

Section: Introductionmentioning

confidence: 99%

Salt-In-Polymer Electrolytes Based on Polysiloxanes for Lithium-Ion Cells: Ionic Transport and Electrochemical Stability

et al. 2011

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In this work, the ion transport and the electrochemical stability has been investigated for cross linked salt-in-polysiloxane membranes containing the two lithium salts with boron based anions, i.e. LiDFOB (lithium difluoro(oxalato)borate) and LiBOB (lithium bis(oxalato)borate) have been investigated. The stability was characterized by cyclic voltammetry at 70 °C in a three electrode cell with Li as counter and reference electrodes and a nickel or platinum working electrode. The electrochemical stability window of polysiloxane based electrolytes ranged between 0 V and 4.7 V vs. Li/Li + . The high ionic conductivity of 6.61 x 10 -2 mS/cm at 30 °C has been examined with impedance spectroscopy on blocking electrodes. The investigated polymer electrolytes showed an outstanding thermal resistance as confirmed by thermal analysis with DSC. Furthermore, analysis of the lithium transference number has been carried out using the potentiostatic polarization method introduced by BRUCE and VINCENT.

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“…Comparable conductivities (up to 7.69 Â 10 À5 S/cm) have been reported by Allcock and co-workers [11] for MEEP-silicate hybrid networks. Polymer electrolytes of a polyaminophosphazene with oligo(propylene oxide) (3) side chains have been reported by Kaskhedikar et al [12] to have ionic conductivities of up to 2.8 Â 10 À4 S/cm for 20 wt% LiCF 3 SO 3 at 801C. Klein and co-workers [13] have shown that ion mobility is about 10 times greater for a poly(methoxyethoxy-ethoxyphenoxyphosphazene) doped with lithium bis(trifluoromethanesulfonyl)imide than for the corresponding ionomer, where the anion is attached covalently to the phenoxy side chain (4) (see Chart 1).…”

Section: Polyphosphazene Electrolytesmentioning

confidence: 99%

“…In terms of gas transport properties, the most extensively studied polymers of this polymer group are four poly(butoxyphosphazenes) (11,12,13,14), where R=OC 4 H 9 , and poly[bis(2,2,2-trifluoroethoxy)phosphazene] (PTFEP) (15), where R=OCH 2 CF 3 (Chart 4). The poly(butoxyphosphazenes) include poly [bis(n-butoxy)phosphazene] (PnBuP) (11), poly[bis(iso-butoxy)phosphazene] (PiBuP) (12), poly[bis(sec-butoxy)phosphazene] (13), and poly[bis(neo-butoxy) phosphazene] (PneoBuP) (14). The interest has been primarily for gas separation membranes [4,5], for which several patents have been issued [27][28][29].…”

Section: Gas Separation Membranesmentioning

confidence: 99%

Transport Properties of Polyphosphazenes

Fried¹

2008

Polyphosphazenes for Biomedical Applications

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Ionic conductivity of polymer electrolyte membranes based on polyphosphazene with oligo(propylene oxide) side chains

Cited by 25 publications

References 28 publications

Salt-in-Polymer Electrolytes for Lithium Ion Batteries Based on Organo-Functionalized Polyphosphazenes and Polysiloxanes

Salt-in-Polymer Electrolytes for Lithium Ion Batteries Based on Organo-Functionalized Polyphosphazenes and Polysiloxanes

Salt-In-Polymer Electrolytes Based on Polysiloxanes for Lithium-Ion Cells: Ionic Transport and Electrochemical Stability

Transport Properties of Polyphosphazenes

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