2020
DOI: 10.1039/d0ee00342e
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Determining the limiting factor of the electrochemical stability window for PEO-based solid polymer electrolytes: main chain or terminal –OH group?

Abstract: Terminal –OH group in PEO-based solid polymer electrolytes is the limiting factor of the electrochemical stability window, replacing it with more stable groups can accelerate the development of high-voltage solid-state batteries.

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Cited by 455 publications
(290 citation statements)
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“…This phenomenon is due to the formation of transient cross-linking structure between –OH group and ions, which will slow down the transport of Li + [ 40 ]. In general, –OH is more reactive than –CH 3 or –OCH 3 , which results in possible side reaction with electrolytes and poor high-voltage-resistance [ 41 ].
Fig.
…”
Section: Polymer-lix Matricesmentioning
confidence: 99%
“…This phenomenon is due to the formation of transient cross-linking structure between –OH group and ions, which will slow down the transport of Li + [ 40 ]. In general, –OH is more reactive than –CH 3 or –OCH 3 , which results in possible side reaction with electrolytes and poor high-voltage-resistance [ 41 ].
Fig.
…”
Section: Polymer-lix Matricesmentioning
confidence: 99%
“…They also show good thermal stability, high mechanical rigidity, and nonflammability. [110][111][112] Common SSEs include polymer electrolytes, [113][114][115] polymer-inorganic composite electrolytes, [116][117][118] and inorganic electrolytes. [119][120][121] Amongst these, inorganic electrolytes have received great attention due to their high ionic conductivity and extremely high Young's modulus, which can enhance the safety of Li-metal batteries.…”
Section: Composite Anodes In Solid-state Batteriesmentioning
confidence: 99%
“…Plots of voltage as a function of specific capacity, various cycling rates at 60 °C, show that the epoxide-based electrolyte maintains significant Coulombic efficiency up to 1 C when cycled against LFP and up to 0.2 C when cycled against NMC (Figure 3) [10]. The ability of this electrolyte to withstand cycling with NMC above 4.0 V suggests that the presence of the epoxide provides some improvement over more traditional PEO-based electrolytes which have been widely reported to become unstable over 4.0 V [72]. Like PEO, DGEPEG can be combined with numerous reagents to yield polymer electrolytes via the ring opening polymerization reaction [16,20].…”
Section: Polyether-basedmentioning
confidence: 94%
“…For example, PEO (which has been extensively studied) is often rated to have an electrochemical stability window of less than 4 V [72]. As PEO is exclusively comprised of C-O-C bonds and is terminated by -OH, some authors have anticipated that one of these structural motifs is more susceptible to oxidative damage than the other.…”
Section: Electrochemical Stability Windowmentioning
confidence: 99%
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