Cross-linking network based on Poly(ethylene oxide): Solid polymer electrolyte for room temperature lithium battery

Zhang, Yuhang; Lü, Wei; Cong, Lina; Liu, Jia; Sun, Liqun; Mauger, A.; Julien, C.; Xie, Haiming; Li, Jun

doi:10.1016/j.jpowsour.2019.02.090

Cited by 207 publications

(153 citation statements)

References 65 publications

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“…The deformation of the charge/discharge curves caused the great increase of the charge potential and the decrease of the discharge potential, and thus can be also regarded as a polarization behavior. Moreover, the deformation became more and more severe with increasing charge/ discharge cycle number or current density, consistent with the previous studies [15,56,91,92]. Actually the ANF/ PEO-FF and ANF/PEO-DF electrolyte-based cells also showed the similar yet non-severe deformation at high current densities of 0.5-1.0 C ( Fig.…”

Section: All-solid-state LI Metal Battery Performancesupporting

confidence: 90%

“…Based on these analyses and other reports on the high stability of the LiFePO 4 cathodes [56,72], one can easily conclude that the deformation is not related to the LiFePO 4 cathode but the electrolyte. Previous studies usually ascribed to the high polarization (or severe charge/discharge curve deformation) to the increase of the internal resistance of the battery and the low Li + ion diffusivity in the solidstate electrolyte and the electrolyte/electrode interface [15,56,72,[91][92][93]. Note that all the solid-state cells exhibited much higher Coulombic efficiencies of nearly 100% during the whole cycling than the traditional LIBs with the organic liquid electrolytes (Fig.…”

Section: All-solid-state LI Metal Battery Performancementioning

confidence: 89%

“…5a, b) and low operation temperature (from 60 to 30°C, Fig. 5a-d) can cause the overpotential increase of the cells due to the resistance change [3,15,30,36,84]. It was also interesting to disclose the impact of the charge/discharge condition on the Coulombic efficiency (CE) of the cells (Fig.…”

Section: Interfacial Resistance Against LI Dendritesmentioning

confidence: 98%

“…Li + ions can move in the free volume of the polymer matrices by inter/intra-chain hopping, but the high crystallization of the polymer matrices causes the low ionic conductivity (10 −8 -10 −6 S cm −1 ) of the SPEs at ambient temperature, due to the slow-down dynamics of the polymer chains [5,13,14]. With the increasing ionic conductance at elevating temperatures, the SPEs lose mechanical strength and dimensional stability in the molten state [5,15]. Besides, the low oxidation potential of the SPEs impedes their practical applications in highenergy batteries [4,16,17].…”

Section: Introductionmentioning

confidence: 99%

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Flexible, high-voltage, ion-conducting composite membranes with 3D aramid nanofiber frameworks for stable all-solid-state lithium metal batteries

Liu

Lyu

et al. 2020

Sci. China Mater.

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The practical application of solid polymer electrolytes in high-energy Li metal batteries is hindered by Li dendrites, electrochemical instability and insufficient ion conductance. To address these issues, flexible composite polymer electrolyte (CPE) membranes with three dimensional (3D) aramid nanofiber (ANF) frameworks are facilely fabricated by filling polyethylene oxide (PEO)-lithium bis(trifluoromethylsulphonyl)imide (LiTFSI) electrolyte into 3D ANF scaffolds. Because of the unique composite structure design and the continuous ion conduction at the 3D ANF framework/PEO-LiTFSI interfaces, the CPE membranes show higher mechanical strength (10.0 MPa), thermostability, electrochemical stability (4.6 V at 60°C) and ionic conductivity than the pristine PEO-LiTFSI electrolyte. Thus, the CPEs display greatly improved interfacial stability against Li dendrites (≥1000 h at 30°C under 0.10 mA cm −2), compared with the pristine electrolyte (short circuit in 13 h). The CPE-based all-solid-state LiFePO 4 /Li cells also exhibit superior cycling performance (e.g., 130 mA h g −1 with 93% retention after 100 cycles at 0.4 C) than the ANF-free cells (e.g., 82 mA h g −1 with 66% retention). This work offers a simple and effective way to achieve high-performance composite electrolyte membranes with 3D nanofiller framework for promising solid-state Li metal battery applications.

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Section: All-solid-state LI Metal Battery Performancesupporting

confidence: 90%

Section: All-solid-state LI Metal Battery Performancementioning

confidence: 89%

Section: Interfacial Resistance Against LI Dendritesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flexible, high-voltage, ion-conducting composite membranes with 3D aramid nanofiber frameworks for stable all-solid-state lithium metal batteries

Liu

Lyu

et al. 2020

Sci. China Mater.

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show abstract

“…To enhance its ionic conductivity, a lot of researches pay their attention on the modification of PEO-based SPE. 18,19 As is known to all, compared with crystalline salt complexes, amorphous salt complexes have higher ionic conductivity, because ions are easier to move in amorphous salt complexes. Additionally, some reports have pointed out the ways to decrease the crystallinity of PEO-based SPEs, such as the blending with other polymers, the combination of inorganic fillers with PEO, etc.…”

Section: Introductionmentioning

confidence: 99%

Toward high performance solid‐state lithium‐ion battery with a promising PEO / PPC blend solid polymer electrolyte

Zhu

Jia

et al. 2020

Int J Energy Res

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A promising solid polymer blend electrolyte is prepared by blending of poly(ethylene oxide) (PEO) with different content of amorphous poly(propylene carbonate) (PPC), in which the amorphous property of PPC is utilized to enhance the amorphous/free phase of solid polymer electrolyte, so as to achieve the purpose of modifying PEO-based solid polymer electrolyte. It indicates that the blending of PEO with PPC can effectively reduce the crystallization and increase the ion conductivity and electrochemical stability window of solid polymer electrolyte. When the content of PPC reaches 50%, the ionic conductivity reaches the maximum, which is 2.04 × 10 −5 S cm −1 and 2.82 × 10 −4 S cm −1 at 25 C and 60 C, respectively. The electrochemical stability window increases from 4.25 to 4.9 V and the interfacial stability of lithium metal anode is also greatly improved. The solid-state LiFePO 4 //Li battery with the PEO/50%PPC blend solid polymer electrolyte has good cycling stability, which the maximum discharge specific capacity is up to 125 mAh g −1 at a charge/discharge current density of 0.5 C at 60 C.

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Enabling Stable Cycling of 4.2 V High‐Voltage All‐Solid‐State Batteries with PEO‐Based Solid Electrolyte

Qiu

Liu

Chen

et al. 2020

Adv Funct Materials

242

162

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Poly(ethylene oxide) (PEO)-based solid electrolytes are expected to be exploited in solid-state batteries with high safety. Its narrow electrochemical window, however, limits the potential for high voltage and high energy density applications. Herein the electrochemical oxidation behavior of PEO and the failure mechanisms of LiCoO 2 -PEO solid-state batteries are studied. It is found that although for pure PEO it starts to oxidize at a voltage of above 3.9 V versus Li/Li + , the decomposition products have appropriate Li + conductivity that unexpectedly form a relatively stable cathode electrolyte interphase (CEI) layer at the PEO and electrode interface. The performance degradation of the LiCoO 2 -PEO battery originates from the strong oxidizing ability of LiCoO 2 after delithiation at high voltages, which accelerates the decomposition of PEO and drives the self-oxygen-release of LiCoO 2 , leading to the unceasing growth of CEI and the destruction of the LiCoO 2 surface. When LiCoO 2 is well coated or a stable cathode LiMn 0.7 Fe 0.3 PO 4 is used, a substantially improved electrochemical performance can be achieved, with 88.6% capacity retention after 50 cycles for Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 coated LiCoO 2 and 90.3% capacity retention after 100 cycles for LiMn 0.7 Fe 0.3 PO 4 . The results suggest that, when paired with stable cathodes, the PEO-based solid polymer electrolytes could be compatible with high voltage operation.

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Cross-linking network based on Poly(ethylene oxide): Solid polymer electrolyte for room temperature lithium battery

Cited by 207 publications

References 65 publications

Flexible, high-voltage, ion-conducting composite membranes with 3D aramid nanofiber frameworks for stable all-solid-state lithium metal batteries

Flexible, high-voltage, ion-conducting composite membranes with 3D aramid nanofiber frameworks for stable all-solid-state lithium metal batteries

Toward high performance solid‐state lithium‐ion battery with a promising PEO / PPC blend solid polymer electrolyte

Enabling Stable Cycling of 4.2 V High‐Voltage All‐Solid‐State Batteries with PEO‐Based Solid Electrolyte

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