A Polyamide Single‐Ion Electrolyte Membrane for Application in Lithium‐Ion Batteries

Sun, Yubao; Rohan, Rupesh; Cai, Weiwei; Wan, Xifei; Pareek, Kapil; An, Lin; Zhang, Yunfeng; Cheng, Hansong

doi:10.1002/ente.201402041

Cited by 33 publications

(45 citation statements)

References 59 publications

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“…The EIS spectra for conductivity measurement at various temperatures are shown in Figure a.The conductivity linearly increases with the temperature, as depicted in the log σ vs 1000/T plot (Figure b), thereby showing a typical Arrhenius curve. As is typical of SICEs, this increment of the ionic conductivity with the temperature is not very steep (conductivity at 80 °C: 4.4×10 −3 S cm −1 ), thereby inferring that the polymeric salt portion remains intact in the membrane and performs as a SICE rather than being dissolved in the solvent , , , . The electrochemical stability of SP‐15 was investigated by linear sweep voltammetry (LSV) (Figure c) using lithium metal as counter and reference electrodes.…”

Section: Resultsmentioning

confidence: 88%

“…Shuttling of lithium ions between the two electrodes of the battery regulates the battery performance and is determined by the ionic conductivity (σ). Most of the SICEs tested so far have shown lower (at least by an order or two) conductivities and therefore poorer performance as compared to dual‐ion lithium salts ,. The ionic conductivity of SP‐15 was measured from 80 to 30 °C downwards.…”

Section: Resultsmentioning

confidence: 99%

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Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

et al. 2017

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Exploring the benefits of a nanofibrous morphology in electrolyte materials for Li‐battery applications, an approach of fabricating single‐ion conducting electrolyte (SICE) membranes is reported. A nonwoven nanofabric SICE membrane, delivering an outstanding performance, surpassing the conventional liquid electrolyte system at ambient conditions, was fabricated by using an electrospinning technique. When soaked in a carbonate solvent system, the membrane shows high ionic conductivity, electrochemical stability above 5.2 V (vs. Li/Li+) and a lithium transference number (tnormalLnormali+ ) close to unity (0.93). Moreover, a LiFePO4|Li cell assembled with this membrane performs charge/discharge up to the 5 C rate under ambient conditions with a coulombic efficiency close to 100%. The discharge capacities of this battery are found to be higher than those of a battery assembled with a commercial separator/dual‐ion salt electrolyte system up to 2 C, which offers significant progress for SICEs. Unlike most of the earlier reported SICEs that performed like a bulk‐material entity, the innovative approach might be valuable for future developments.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

et al. 2017

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“…[23,24,27,49,50] The low T g arises mainly due to PMHS, the parent polysiloxane chain. [23,24,27,49,50] The low T g arises mainly due to PMHS, the parent polysiloxane chain.…”

Section: Synthesis and Characterization Of Lithium 4-styrenesulfonyl mentioning

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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“…4) and a represents the surface area. 36,37 The as-synthesized polymer contains a high proportion of aluminium centers, which gives rise to high rigidity of the framework. 4.…”

Section: Resultsmentioning

confidence: 99%

A novel sp³Al-based porous single-ion polymer electrolyte for lithium ion batteries

Rohan

et al. 2015

RSC Adv.

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We report synthesis of an Al-based porous gel single-ion polymer electrolyte, lithium poly (glutaric acid aluminate) (LiPGAA), using glutaric acid and lithium tetramethanolatoaluminate as the precursors. The three-dimensional network compound provides short lithium-ion transport pathways and allows organic solvents to be accommodated in the composite for rapid ion transport. The tetraalkoxyaluminate units in the material enable Li-ions to be weakly associated with the polymeric framework, leading to a high ionic conductivity of 1.47 Â 10 À4 S cm À1 at room temperature and a high Li-ion transference number of 0.8. A membrane of the polymer was prepared via a solution cast method with PVDF-HFP poly(vinylidene-fluoride-co-hexafluoropropene) followed by soaking in a solution of ethylene carbonate (EC) and propylene carbonate (PC) (v/v, 1 : 1). A Li-ion battery assembled with the composite membrane displays remarkable cyclability with nearly 100% coulombic efficiency over a wide temperature range.

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A Polyamide Single‐Ion Electrolyte Membrane for Application in Lithium‐Ion Batteries

Cited by 33 publications

References 59 publications

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

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

A novel sp³Al-based porous single-ion polymer electrolyte for lithium ion batteries

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A Polyamide Single‐Ion Electrolyte Membrane for Application in Lithium‐Ion Batteries

Cited by 33 publications

References 59 publications

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature

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

A novel sp3Al-based porous single-ion polymer electrolyte for lithium ion batteries

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A novel sp³Al-based porous single-ion polymer electrolyte for lithium ion batteries