Research progress on gel polymer electrolytes for lithium-sulfur batteries

Qian, Jie; Jin, Biyu; Li, Yuanyuan; Zhan, Xiaoli; Hou, Yang; Zhang, Qinghua

doi:10.1016/j.jechem.2020.08.026

Cited by 73 publications

(44 citation statements)

References 178 publications

(241 reference statements)

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“…Another big advantage is the combination of the high chemical stability of ionic liquids, brought together with the possibility to easily use other conducting salts. Accordingly, the PIL membranes are generally not just limited by the explicit usage for LiTFSI but may also be interesting for post lithium-ion cell systems such as lithium-sulfur or multivalent rechargeable batteries, or even in the field of [ 25 ].…”

Section: Discussionmentioning

confidence: 99%

Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes

et al. 2021

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Eight new polymerized ammonium-based ionic liquids were prepared as thin membrane films and evaluated within the scope of their usage in lithium-ion batteries. The focus of this work is to get a better understanding of the influence of structural modifications of the monomers on the polymerized materials. Further, different concentrations of a lithium-ion conducting salt were applied in order to receive an optimized combination of monomer structure and lithium salt concentration. It was found that an increased side chain length of the studied ammonium-based polymerized ionic liquids leads to a reduction in glass transition temperatures and increased ionic conductivity values. As a result of the addition of conducting salt to the PIL membranes, the glass transition temperatures and the ionic conductivity values decreases. Nevertheless, PFG-NMR reveals a higher lithium-ion mobility for a sample with higher conducting salt content.

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Section: Discussionmentioning

confidence: 99%

Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes

et al. 2021

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“…In addition, soluble polysulfide (PS) Li 2 S n 4 ≤ n ≤ 8 intermediates can diffuse between the sulfur cathode and lithium metal (Li°) anode during the charge/discharge processes (known as the PS "shuttle effect"), which leads to the irreversible loss of electroactive materials and deterioration of the electrode-electrolyte interphases, particularly for the Li° anode, thus significantly shortening the cycle life of the cell [12,14] . Due to their negligible volatility, appealing flexibility and mechanical stability, polymer electrolytes (PEs) [15,16] , including all-solid-state polymer electrolytes (ASSPEs) [17] and quasi-solid-state polymer electrolytes (QSSPEs) [18,19] , not only significantly improve battery safety, but are also expected to augment the all-inclusive energy density compared to liquid systems [14] .…”

Section: Introductionmentioning

confidence: 99%

Perspective of polymer-based solid-state Li-S batteries

Castillo¹,

Qiao²,

Santiago³

et al. 2022

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Li-S batteries, as the most promising post Li-ion technology, have been intensively investigated for more than a decade. Although most previous studies have focused on liquid systems, solid electrolytes, particularly all-solidstate polymer electrolytes (ASSPEs) and quasi-solid-state polymer electrolyte (QSSPEs), are appealing for Li-S cells due to their excellent flexibility and mechanical stability. Such Li-S batteries not only provide significantly improved safety but are also expected to augment the all-inclusive energy density compared to liquid systems. Therefore, this perspective briefly summarizes the recent progress on polymer-based solid-state Li-S batteries, with a special focus on electrolytes, including ASSPEs and QSSPEs. Furthermore, future work is proposed based on the existing development and current challenges.

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“…Due to the good mechanical property of PEO, it can physically prevent the contact between liquid anode and sulfide SE. Moreover, PEO with ether bonds have good affinity with the DME component [33] in the liquid Li 1.5 Bp 3 (DME) 10 anode, so that DME can act as a plasticizer to improve the ionic conductivity of PEO for a reduced interfacial impedance. However, if Li 1.5 Bp 3 (DME) 10 anode is replaced by common Li metal anode, the voltage curve of Li/PEO/LPS/PEO/Li symmetric cell will no longer be stable and micro-short circuit can be observed (Supplementary Figure 5).…”

Section: J(t) Expmentioning

confidence: 99%

High Current Density and Long Cycle Life Enabled by Sulfide Solid Electrolyte and Dendrite‐Free Liquid Lithium Anode

Peng

Song

et al. 2021

Adv Funct Materials

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Lithium metal is the ideal anode candidate but suffers from great challenges including poor thermodynamic stability in liquid organic electrolytes and dendrite nucleation/growth during the continuous plating/stripping process. To solve the difficulties listed above, here, a battery configuration combining a liquid lithium solution anode, a sulfide solid electrolyte, and an interfacial protection layer is proposed to prevent interfacial reaction between the two components. This configuration combines the advantages of liquid-lithium-solution anode (dissolve lithium to essentially prevent lithium nucleation) and sulfide solid electrolyte (highest room-temperature ionic conductivity among all solid electrolytes and ideal mechanical ductility for fully compact layer simply by cold pressing), so that a record-high current density (17.78 mA cm −2 ) and long cycle life (nearly 3000 h) are realized. At the same time, the solubility of lithium metal in the liquid Li anode and electrochemical properties of liquid Li anode are systematically studied to find the most suitable liquid Li anode concentration with the highest room-temperature conductivity (12.2 mS cm −1 ). This work provides a promising approach and battery configuration for achieving high-specificcapacity, high-energy/power-density and long-cycle-life secondary batteries.

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Research progress on gel polymer electrolytes for lithium-sulfur batteries

Cited by 73 publications

References 178 publications

Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes

Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes

Perspective of polymer-based solid-state Li-S batteries

High Current Density and Long Cycle Life Enabled by Sulfide Solid Electrolyte and Dendrite‐Free Liquid Lithium Anode

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