Functionalized meso/macro-porous single ion polymeric electrolyte for applications in lithium ion batteries

Rohan, Rupesh; Sun, Yubao; Cai, Weiwei; Pareek, Kapil; Zhang, Yunfeng; Xu, Guodong; Cheng, Hansong

doi:10.1039/c3ta13765a

Cited by 59 publications

(57 citation statements)

References 50 publications

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“…For example, the hybrid film displays a roomtemperature conductivity of 3.1 × 10 −3 S cm −1 , which is among the highest conductivity values achieved for single-ion conductors. 32,36 This value is greater than those of traditional liquid electrolytes incorporated with polyolefin separators, that is, 0.1−1 × 10 −3 S cm −1 , depending on the structures of salts and solvents. 3 As shown in Figure 2a, 1 M LiPF 6 in DEC + EC + PC (1:1:1 by volume) with Celgard 2325 exhibits a roomtemperature conductivity of ∼0.62 × 10 −3 S cm −1 , which is consistent with literature results.…”

Section: Resultsmentioning

confidence: 90%

Poly(arylene ether)-Based Single-Ion Conductors for Lithium-Ion Batteries

Yoo

et al. 2015

Chem. Mater.

128

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Single-ion conducting electrolytes present a unique alternative to traditional binary salt conductors used in lithium-ion batteries. It has been shown theoretically that single-ion electrolytes can eliminate the salt concentration gradient and polarization loss in the cell that develop in a binary salt system, resulting in substantial improvements in materials utilization for high power and energy densities. Here, we describe synthesis and characterization of a class of single-ion electrolytes based on aromatic poly(arylene ether)s with pendant lithium perfluoroethyl sulfonates. The microporous polymer film saturated with organic carbonates exhibits a nearly unity Li + transference number, very high conductivities (e.g., > 10 −3 S m −1 at room temperature) over a wide range of temperatures, great electrochemical stability, and outstanding mechanical properties. Excellent cyclability with almost identical charge and discharge capacities has been demonstrated at ambient temperature in the batteries assembled from the prepared single-ion conductors.

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Section: Resultsmentioning

confidence: 90%

Poly(arylene ether)-Based Single-Ion Conductors for Lithium-Ion Batteries

Yoo

et al. 2015

Chem. Mater.

128

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“…To deal with this problem, the concept of single-ion conducting electrolyte, with or without an organic solvent, was recently coined [6]. A single ion electrolyte is made of a polymeric or copolymeric lithium salt [11][12][13][14][15][16][17][18][19][20]. The polymeric part of the lithium salt serves as immobile anions in the framework and allows transport of lithium ions only upon charging or discharging.…”

Section: Introductionmentioning

confidence: 99%

Functionalized polystyrene based single ion conducting gel polymer electrolyte for lithium batteries

et al. 2014

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“…[1][2][3][4] The concept of single ion polymeric electrolyte (SIPE) was proposed with the aim to overcome most of the problems associated with the current electrolytes, [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] such as severe concentration polarization and potential safety hazard. [23][24][25][26][27][28][29] Indeed, a versatile SIPE capable of sustaining a high C-rate in a wide range of temperature remains to be developed. Most notably, these materials exhibit relatively small ionic conductivity and often present high interfacial resistance when used in batteries.…”

Section: Introductionmentioning

confidence: 99%

A high performance polysiloxane-based single ion conducting polymeric electrolyte membrane for application in lithium ion batteries

et al. 2015

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We report a polysiloxane based single-ion conducting polymer electrolyte (SIPE) synthesized via hydrosilylation technique. Styrenesulfonyl (phenylsulfonyl) imide groups were grafted on the highly flexible polysiloxane chains followed by lithiation. The highly delocalized anionic charges in the grafted moiety give rise to weak association with lithium ions in the polymer matrix, resulting in lithium ion transference number close to unity (0.89) and remarkably high ionic conductivity (7.2 ×10 -4 Scm -1 ) at room temperature. The high flexibility arising from polysiloxane enables the glass transition temperature (T g ) to be below room temperature. The electrolyte membrane displays high thermal stability and a strong mechanical strength. A coin cell assembled with the membrane comprised of the electrolyte and poly(vinylidene-fluoride-cohexafluoropropene) (PVDF-HFP) performs remarkably well over a wide range of temperature with high charge-discharge rates.12 rule in a three step cyclic process.[36] Following the same mechanism, here, the vinylic part of SPSIK was attached to the polysiloxane chains upon addition of a Si-H bond.The grafting of SPSIK on PMHS chains followed by exchange of K + ions by Li + ions was clearly proven to be successful by FTIR and NMR spectra. As can be seen in the FTIR spectra of PMHS and SG (Fig. 1), the peak at 2167 cm -1 in PMHS, corresponding to Si-H bond, is disappeared in SG, which confirms the grafting of SPSIK. In addition, the peak at 1627 cm -1 in SPSIK, corresponding to the vinylic group, is also disappeared in SG, confirming the grafting, which consumes the vinylic group. Furthermore, the signature signal of Si-H, appears at 4.68 ppm ( 1 H NMR) in PMHS, and the three peaks in the range of 6.78 to 5.31 ppm ( 1 H NMR) in SPSIK corresponding to 3 vinylic protons, are disappeared in SG, validating the grafting of SP on the PMHS chains. [43,46]. Finally, the overall synthesis of SG electrolyte was confirmed by the coherence between the expected and the found values for all the elements, except for Si, in the elemental analysis. The deviation observed for Si is mainly attributed to the incomplete digestion of Si during the analysis, which was also noticed during the elemental analysis of commercial products of Si such as PMHS and poly(methylphenylsiloxane)(PMPS) ( Table S1 in Supporting Information). The GPC analysis of SG in the tetrahydrofuran (THF) mobile phase depicts the number average molecular weight (Mn) of 84,238, weight average molecular weight (Mw) of 150,230, and poly dispersity index (PDI) of 1.78 based on the polystyrene standard.

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Functionalized meso/macro-porous single ion polymeric electrolyte for applications in lithium ion batteries

Abstract: We report a method to significantly enhance the conductivity of lithium ions in a polymeric lithium salt membrane by introducing functionalized meso/macro-pores to accommodate a mixture of organic solvents in the polymer matrix.

Cited by 59 publications

References 50 publications

Poly(arylene ether)-Based Single-Ion Conductors for Lithium-Ion Batteries

Poly(arylene ether)-Based Single-Ion Conductors for Lithium-Ion Batteries

Functionalized polystyrene based single ion conducting gel polymer electrolyte for lithium batteries

A high performance polysiloxane-based single ion conducting polymeric electrolyte membrane for application in lithium ion batteries

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