A hybrid polymer/oxide/ionic-liquid solid electrolyte for Na-metal batteries

Song, Shufeng; Kotobuki, Masashi; Zheng, Feng; Xu, Chaohe; Savilov, S. V.; Hu, Ning; Li, Lü; Wang, Yu; Li, Wei Dong Z.

doi:10.1039/c6ta11165c

Cited by 97 publications

(69 citation statements)

References 47 publications

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“…Another advantage of the sodium is that its softness nature makes the smooth and proper contact with the electrochemical devices. The ionic conducting properties of PEO, doped with different sodium salts like sodium perchlorate (NaClO4), sodium fluoride (NaF), sodium iodide (NaI), sodium bromide (NaBr), sodium hexafluoro phosphate (NaPF6), sodium periodate (NaIO4), sodium tetrafluoroborate (NaBF4) have already been reported in literature [10,46,[48][49][50][51][52][53][54][55]. So, after reviewing the various sodium based solid polymer electrolyte systems, sodium hexafluoro phosphate (NaPF6) is selected as the cation (Na + ) source for doping PEO/PVP based blend solid polymer electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

Arya

Sharma

2018

J Solid State Electrochem

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The present paper report is focused toward the preparation of the flexible and freestanding blend solid polymer electrolyte films based on PEO-PVP complexed with NaPF6 by solution cast technique. The structural/morphological features of the synthesized polymer nanocomposite films have been investigated in detail using X-ray diffraction, Fourier transform infra-red spectroscopy, field emission scanning electron microscope, and atomic force microscopy techniques. The film PEO-PVP+NaPF6 (Ö/Na + = 8) exhibits highest ionic conductivity ~5.92×10 -6 S cm -1 at 40 °C and ~2.46×10 -4 S cm -1 at 100 °C. The temperature dependent conductivity shows Arrhenius type behavior and activation energy decreases with the addition of salt. The high temperature (100 °C) conductivity monitoring is done for the optimized PEO-PVP+NaPF6 (Ö/Na + =8) highly conductive system and the conductivity is still maintained stable up to 160 h (approx. 7 days). The thermal transitions parameters were measured by the differential scanning calorimetry (DSC) measurements. The prepared polymer electrolyte film displays the smoother surface in addition of salt and a thermal stability up to 300 o C. The ion transference number (tion) for the highest conducting sample is found to be 0.997 and evidence that the present system is ion dominating with negligible electron contribution. Both linear sweep voltammetry and cyclic voltammetry supports the use of prepared polymer electrolyte with long-term cycle stability and thermal stability for the solid state sodium ion batteries. Finally, a two peak percolation mechanism has been proposed on the basis of experimental findings.

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Section: Introductionmentioning

confidence: 99%

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

Arya

Sharma

2018

J Solid State Electrochem

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“…) and high electronic conductivity . In contrast, polymer electrolytes, such as polyethylene oxide (PEO), polyacrylonitrile, polyvinyl alcohol, poly(vinylidene fluoride‐hexafluoropropylene) (PVDF‐HFP) and polyvinyl pyrrolidone, possess excellent flexibility and good interfacial compatibility, but the low ionic conductivity and transference number largely restrict their application in Na metal batteries . As summarized in the review reported by Manthiram et al, none of single solid electrolytes can meet all practical requirements in solid batteries; hence, compositing solid electrolytes with tailor‐designed interfaces exhibit a tremendous vitality, such as multilayered compositing electrolytes .…”

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confidence: 99%

A Flexible Solid Electrolyte with Multilayer Structure for Sodium Metal Batteries

Ling

Yue

et al. 2020

Advanced Energy Materials

101

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Solid electrolytes (SEs) can potentially address the inherent safety problems of conventional organic liquid electrolytes. However, their low ionic conductivity and large interfacial resistance limit the practical applications of SEs. Here, a flexible solid electrolyte with a multilayer structure is fabricated by the UV curing of an interpenetrating network of poly(ether‐acrylate) (ipn‐PEA) in the Na3Zr2Si2PO12/poly(vinylidene fluoride‐hexafluoropropylene) porous skeleton (NZSP/PVDF‐HFP), exhibiting a high Na+ transference number of 0.63 and a suitable ionic conductivity of above 10−4 S cm−1 at 60 °C. In addition, due to the unique structure of the internal rigidity and external flexibility, the composite solid electrolyte can effectively mitigate interfacial ion transfer issues while guaranteeing a certain mechanical strength, and largely inhibiting the formation of dendrite and dead sodium. The solid sodium metal batteries using Na3V2(PO4)3 (NVP) as a cathode possess a discharge capacity of 85 mA h g−1 after 100 cycles at 0.5 C, and achieve above 90% of capacity retention rate during 100 cycles at 0.1 C for Na2/3Ni1/3Mn1/3Ti1/3O2 (NTMO) at 60 °C. The flexible solid electrolyte with multilayer structure shows a great advantage for managing the ionic conductivity and interface resistance problem, suggesting a promise as a practical sodium metal battery.

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“…[36][37][38] Moreover, NIEs based on hydrophobic nanoparticle matrices and ILs have been utilized for lithium-air batteries to protect the lithium-metal anode from moisture in atmosphere (Figure 3c), thereby improving the lifespan of this open-architecture battery in ambient conditions. [39,40] NIEs have also been explored for rechargeable batteries based on earth-abundant materials such as sodium, [41][42][43][44] zinc, [45,46] and magnesium. [47] For example, a sodium-ion-conducting hybrid NIE based on poly(ethylene oxide), SiO 2 nanoparticles, and EMIM-FSI/NaClO 4 demonstrated solid-state sodium-metal batteries with an initial capacity of 90.5 mAh g −1 at 0.05C at room temperature and a capacity retention of 51% after 100 cycles.…”

Section: (4 Of 7)mentioning

confidence: 99%

“…[47] For example, a sodium-ion-conducting hybrid NIE based on poly(ethylene oxide), SiO 2 nanoparticles, and EMIM-FSI/NaClO 4 demonstrated solid-state sodium-metal batteries with an initial capacity of 90.5 mAh g −1 at 0.05C at room temperature and a capacity retention of 51% after 100 cycles. [41] Similarly, a zinc-ion-conducting NIE was formulated with poly(diallyldimethylammonium bis(trifluoromethanesulfonyl) imide), 1-ethyl-3-methylimidazolium dicyanamide, and Al 2 O 3 nanoparticles, resulting in a first cycle discharge capacity of ≈60 mAh g −1 and a capacity retention of 85% after ten cycles at 0.01 mA cm −2 at 50 °C. [45] Although these battery performance metrics need to be significantly improved, these proof-of-concept results suggest that NIEs should continue to be evaluated for emerging batteries based on beyond-lithium chemistries.…”

Section: (4 Of 7)mentioning

confidence: 99%

Nanocomposite Ionogel Electrolytes for Solid‐State Rechargeable Batteries

Hyun

Thomas

Hersam

2020

Advanced Energy Materials

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Ionogels composed of ionic liquids and gelling solid matrices offer several advantages as solid‐state electrolytes for rechargeable batteries, including safety under diverse operating conditions, favorable electrochemical and thermal properties, and wide processing compatibility. Among gelling solid matrices, nanoscale materials have shown particular promise due to their ability to concurrently enhance ionogel mechanical properties, thermal stability, ionic conductivity, and electrochemical stability. These beneficial attributes suggest that ionogel electrolytes are not only of interest for incumbent lithium‐ion batteries but also for next‐generation rechargeable battery technologies. Herein, recent advances in nanocomposite ionogel electrolytes are discussed to highlight their advantages as solid‐state electrolytes for rechargeable batteries. By exploring a range of different nanoscale gelling solid matrices, relationships between nanoscale material structure and ionogel properties are developed. Furthermore, key research challenges are delineated to help guide and accelerate the incorporation of nanocomposite ionogel electrolytes in high‐performance solid‐state rechargeable batteries.

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A hybrid polymer/oxide/ionic-liquid solid electrolyte for Na-metal batteries

Abstract: The development of solid electrolytes with superior electrical and electrochemical performances for the room-temperature operation of sodium (Na)-based batteries is at the infant stage and still remains a challenge.

Cited by 97 publications

References 47 publications

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

A Flexible Solid Electrolyte with Multilayer Structure for Sodium Metal Batteries

Nanocomposite Ionogel Electrolytes for Solid‐State Rechargeable Batteries

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