Interface Modification of lithium Metal Anode and Solid-state Electrolyte with Gel Electrolyte

Renna, Lawrence A.; Blanc, Francois-Guillame; Giordani, Vincent

doi:10.1149/1945-7111/ab7fb7

Cited by 17 publications

(21 citation statements)

References 41 publications

(46 reference statements)

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“…As is readily observed, the melting point of the bare PEO-PVP-NaPF 6 SPE is around 71 °C, which reduces to about 58 °C after addition of 1.0 wt% InAs NWs. The degree of crystallinity ( χ c ) of the SPEs can be assessed by the formula 41 where ∆H m is the melting enthalpy of the SPE and ∆H PEO (203 J g −1 ) is the melting enthalpy of 100% crystalline PEO 42 . The value of χ c decreases from 35.6 to 17.8% after the addition of InAs NWs, which shows that the added NWs do indeed decrease the crystallinity of PEO and thereby increase the PEO segmental mobility.…”

Section: Resultsmentioning

confidence: 99%

High sodium ionic conductivity in PEO/PVP solid polymer electrolytes with InAs nanowire fillers

Devi

Gellanki

Pettersson

et al. 2021

Sci Rep

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Solid-state sodium ion batteries are frequently referred to as the most promising technology for next-generation energy storage applications. However, developing a suitable solid electrolyte with high ionic conductivity, excellent electrolyte–electrode interfaces, and a wide electrochemical stability window, remains a major challenge. Although solid-polymer electrolytes have attracted great interest due to their low cost, low density and very good processability, they generally have significantly lower ionic conductivity and poor mechanical strength. Here, we report on the development of a low-cost composite solid polymer electrolyte comprised of poly(ethylene oxide), poly(vinylpyrrolidone) and sodium hexafluorophosphate, mixed with indium arsenide nanowires. We show that the addition of 1.0% by weight of indium arsenide nanowires increases the sodium ion conductivity in the polymer to 1.50 × 10−4 Scm−1 at 40 °C. In order to explain this remarkable characteristic, we propose a new transport model in which sodium ions hop between close-spaced defect sites present on the surface of the nanowires, forming an effective complex conductive percolation network. Our work represents a significant advance in the development of novel solid polymer electrolytes with embedded engineered ultrafast 1D percolation networks for near-future generations of low-cost, high-performance batteries with excellent energy storage capabilities.

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Section: Resultsmentioning

confidence: 99%

High sodium ionic conductivity in PEO/PVP solid polymer electrolytes with InAs nanowire fillers

Devi

Gellanki

Pettersson

et al. 2021

Sci Rep

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show abstract

“…Where ∆Hm is the melting enthalpy of the SPE and ∆HPEO (203 Jg -1 ) is the melting enthalpy of 100% crystalline PEO [29]. The value of χc decreases from 35.6% to 17.8% after the addition of InAs NWs, which shows that the added NWs do indeed decrease the crystallinity of PEO and thereby increase the PEO segmental mobility.…”

Section: (B) (A)mentioning

confidence: 95%

High sodium ionic conductivity in PEO/PVP solid polymer electrolytes with InAs nanowire fillers

Devi

Gellanki

Pettersson

et al. 2021

Preprint

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Solid-state sodium ion batteries are frequently referred to as the most promising technology for future energy storage applications. However, developing a solid electrolyte with high ionic conductivity and a wide electrochemical stability window, remains a major challenge. Although solid-polymer electrolytes have attracted great interest due to their low cost, low density and very good processability, they generally have significantly lower ionic conductivity and poor mechanical strength. Here, we report on the development of a low-cost solid polymer electrolyte comprised of poly(ethylene oxide), poly(vinylpyrrolidone) and sodium hexafluorophosphate, mixed with indium arsenide nanowires. We show that the addition of 1.0 percent by weight of nanowires increases the sodium ion conductivity in the polymer to 1.50 × 10-4 Scm−1 at 40° C. This is the highest reported conductivity for any solid polymer electrolyte to date. In order to explain this remarkable characteristic, we propose a new transport model where sodium ions hop between close-spaced defect sites present on the surface of the nanowires, forming an effective complex conductive percolation network. Our work represents a significant advance in the development of novel solid polymer electrolytes with embedded ultrafast 1D percolation networks for next generations of low-cost, high-performance batteries with excellent energy storage capabilities.

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“…The temperature-dependent ionic conductivities of PEO/LiTFSI + x wt% AlF 3 composite electrolytes were evaluated by electrochemical impedance spectroscopy (EIS, Fig. S6) [29,30]. Fig.…”

Section: Structural Characterization and Kinetics Of The Peo-based Composite Electrolytesmentioning

confidence: 99%

A strong Lewis acid imparts high ionic conductivity and interfacial stability to polymer composite electrolytes towards all-solid-state Li-metal batteries

Wang¹,

Zhong²,

Wen³

et al. 2022

Sci. China Mater.

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The development of high-performance solid polymer electrolytes is crucial for producing all-solid-state lithium metal batteries with high safety and high energy density. However, the low ionic conductivity of solid polymer electrolytes and their unstable electrolyte/electrode interfaces have hindered their widespread utilization. To address these critical challenges, a strong Lewis acid (aluminum fluoride (AlF 3 )) with dual functionality is introduced into poly(ethylene oxide) (PEO)-based polymer electrolyte. The AlF 3 facilitates the dissociation of lithium salt, increasing the iontransfer efficiency due to the Lewis acid-base interaction; further the in-situ formation of lithium fluoride-rich interfacial layer is promoted, which suppresses the uneven lithium deposition and continuous undesired reactions between the Li metal and PEO matrix. Benefiting from our rational design, the symmetric Li/Li battery with the modified electrolyte exhibits much longer cycling stability (over 3600 h) than that of the pure PEO/lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) electrolyte (550 h). Furthermore, the all-solid-state LiFePO 4 full cell with the composite electrolyte displays a much higher Coulombic efficiency (98.4% after 150 cycles) than that of the electrolyte without the AlF 3 additive (63.3% after 150 cycles) at a large voltage window of 2.4-4.2 V, demonstrating the improved interface and cycling stability of solid polymer lithium metal batteries.

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Interface Modification of lithium Metal Anode and Solid-state Electrolyte with Gel Electrolyte

Cited by 17 publications

References 41 publications

High sodium ionic conductivity in PEO/PVP solid polymer electrolytes with InAs nanowire fillers

High sodium ionic conductivity in PEO/PVP solid polymer electrolytes with InAs nanowire fillers

High sodium ionic conductivity in PEO/PVP solid polymer electrolytes with InAs nanowire fillers

A strong Lewis acid imparts high ionic conductivity and interfacial stability to polymer composite electrolytes towards all-solid-state Li-metal batteries

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