S-containing copolymer as cathode material in poly(ethylene oxide)-based all-solid-state Li-S batteries

Gracia, Ismael; Youcef, Hicham Ben; Judez, Xabier; Oteo, Uxue; Zhang, Heng; Li, Chunmei; Rodrı́guez-Martı́nez, Lide M.; Armand, Michel

doi:10.1016/j.jpowsour.2018.04.052

Cited by 52 publications

(27 citation statements)

References 31 publications

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“…Various strategies have been proposed to overcome the above‐mentioned impediments, such as tailoring the cathode formulation, via the use of advanced carbon materials, addition of PS‐reservoirs, implementation of PS‐impermeable interlayers, or modification of active material (e. g., organosulfur). Other strategies have been devoted to Li 0 anode protection by regulating its morphology (e. g., Li 0 based alloys) or by adjusting electrolyte formulation (e. g., electrolyte additives, novel salt anions,, all‐solid‐state electrolytes,)…”

Section: Figurementioning

confidence: 99%

Understanding the Role of Nano‐Aluminum Oxide in All‐Solid‐State Lithium‐Sulfur Batteries

et al. 2018

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Aluminum oxide (Al2O3) is a well‐known electrolyte filler for stabilizing the Li‐metal (Li0) anode in all‐solid‐state Li0‐based batteries. However, its strong interactions with lithium polysulfides (PS) hinder the direct application of Al2O3‐added electrolytes in all‐solid‐state lithium‐sulfur batteries (ASSLSBs). Herein, the role of Al2O3 in ASSLSBs both as electrolyte filler and cathode additive is studied. The combination of Al2O3‐added electrolyte and Al2O3‐added S8 cathode with optimum cell configuration could deliver an unprecedented discharge capacity of 0.85 mAh cm−2 (C/10, 30 cycles) for polymer‐based ASSLSBs. These results suggest that the rational incorporation of Al2O3 can lead simultaneously to PS anchoring and Li0 anode stabilizing benefits from the ceramic filler, thus improving the electrochemical performance of ASSLSBs.

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Section: Figurementioning

confidence: 99%

Understanding the Role of Nano‐Aluminum Oxide in All‐Solid‐State Lithium‐Sulfur Batteries

et al. 2018

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“…According to previous study, PEO‐based SPE‐ASSLS batteries show two plateaus in discharge process, [ 7 ] and polysulfides are observed in electrolyte. [ 8 ] So, people generally believe that SPE‐ASSLS batteries have the same working/failure mechanism as conventional liquid electrolyte Li/S (LELS) batteries.…”

Section: Introductionmentioning

confidence: 97%

Mechanistic Investigation of Polymer‐Based All‐Solid‐State Lithium/Sulfur Battery

Liu

Lin

et al. 2021

Adv Funct Materials

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Although employing solid polymer electrolyte (SPE) in all-solid-state lithium/ sulfur (ASSLS) batteries is a promising approach to obtain a power source with both high energy density and safety, the actual performance of SPE-ASSLS batteries still lag behind conventional lithium/sulfur batteries with liquid ether electrolyte. In this work, combining characterization methods of X-ray photoelectron spectroscopy, in situ optical microscopy, and three-electrode measurement, a direct comparison between these two battery systems is made to reveal the mechanism behind their performance differences. In addition to polysulfides, it is found that the initial elemental sulfur can also dissolve into and diffuse through the SPE to reach the anode. Different from the shuttle effect that causes uniform corrosion on the anode in a liquid electrolyte, dissolved sulfur species in SPE unevenly passivate the anode surface and lead to the inhomogeneous Li + plating/stripping at the anode/SPE solid-solid interface. Such inhomogeneity eventually causes void formation at the interface, which leads to the failure of SPE-ASSLS batteries. Based on this understanding, a protection interlayer is designed to inhibit the shuttling of sulfur species, and the modified SPE-ASSLS batteries show much-improved performance in cycle life.

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“…Hence, the demand for rechargeable power sources is now focusing on solvent‐free polymer electrolytes, which have been attaining great research attention both academically and industrially over the last two decades . Solid polymer electrolytes (SPEs) (the solvent‐free polymer electrolytes) based on poly(ethylene oxide) (PEO) as a polymer host have been extensively studied, due to its high solvating capability of wide variety of metallic salts such as lithium sulfate (Li 2 SO 4 ), lithium iodide (LiI), lithium triflate (LiCF 3 SO 3 ), lithium bis(fluorosulfonyl)imide (LiFSI), lithium perchlorate (LiClO 4 ) and lithium tetrafluoroborate (LiBF 4 ) . However, the binary systems of PEO and salt display low conductivity ( σ DC ∼10 −6 –10 −8 S cm −1 ) and show higher conductivity ( σ DC ∼10 −4 S cm −1 ) above its melting temperature at around 65 °C and hence, they are not suitable for the commercial application at ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties and Morphology of Poly(ethylene oxide)/Poly(n‐butyl methacrylate) Blends

Ramli

Chan

Ali

2018

Macromolecular Symposia

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From the thermodynamic point of view, most of the high molar‐mass binary polymer blends are immiscible due to the entropic contribution to the free energy of mixing is relatively small. The miscibility of the systems on the molecular scale can be assessed by the thermal properties such as quantities of glass transition temperature (Tg) and change in heat capacity (ΔCp) of the polymers. For a semi‐crystalline polymer such as poly(ethylene oxide) (PEO), the crystallinity (X*) and the melting temperature (Tm) can also give some hints on the miscibility. Apart from the thermal properties, additional scientific findings such as morphology of the blends are needed as supplementary evidences to support the results. We focus on the PEO as the polymer host, blends with poly(n‐butyl methacrylate) (PnBMA) which were prepared using solution casting technique. Thermal properties of PEO/PnBMA polymer blends were investigated by modulated differential scanning calorimeter (MDSC) on the isothermal crystallized samples at 25 °C. Tg of PEO in the blends do not show significant variation with addition of PnBMA for entire composition range while for Tg of PnBMA in the blends, it is challenging to be estimated under the experimental condition due to the overlapping of the Tg of PnBMA and melting endotherm of PEO. Constancy of quantity Tg of PEO and ΔCp of PEO corresponding to the content of PEO in the blends suggest that PEO and PnBMA are immiscible for entire blend composition. X* and Tm of PEO in the blends show insignificant variation in PEO/PnBMA blends, when PEO as major component. This implies that these blends are immiscible under the experimental conditions as agreed with results of Tg and ΔCp. Spherulitic morphologies of PEO in the blends were studied by polarized optical microscopy (POM). PnBMA phase disperses randomly in PEO matrix when PEO in excess. The absence of significant change for the fibrillar spherulitic structures of PEO spherulites with addition of PnBMA (when PEO is the major component) suggests that immiscibility of PEO and PnBMA. Besides, the crystalline structure of PEO in PEO/PnBMA blends using X‐ray diffraction (XRD) reveals that the crystalline structure of PEO is not disturbed with the addition of PnBMA when PEO is in excess as the two distinct peaks of PEO do not shift as compared to neat PEO. Impedance spectroscopy (IS) studies show that the ionic conductivities (σDC) of the polymer blends at room temperature slightly increase with increasing of PEO with the order of magnitude of 10−11–10−10 S cm−1. This system serves as a potential polymer host as solid polymer electrolytes when added with inorganic salt.

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S-containing copolymer as cathode material in poly(ethylene oxide)-based all-solid-state Li-S batteries

Cited by 52 publications

References 31 publications

Understanding the Role of Nano‐Aluminum Oxide in All‐Solid‐State Lithium‐Sulfur Batteries

Understanding the Role of Nano‐Aluminum Oxide in All‐Solid‐State Lithium‐Sulfur Batteries

Mechanistic Investigation of Polymer‐Based All‐Solid‐State Lithium/Sulfur Battery

Thermal Properties and Morphology of Poly(ethylene oxide)/Poly(n‐butyl methacrylate) Blends

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