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- W3176250470 abstract "Polyacetal electrolytes have been demonstrated as promising alternatives to liquid electrolytes and poly(ethylene oxide) (PEO) for rechargeable lithium-ion batteries; however, the relationship between polymer structure and ion motion is difficult to characterize. Here, we study structure–property trends in ion diffusion with respect to polymer composition for a systematic series of five polyacetals with varying ratios of ethylene oxide (EO) to methylene oxide (MO) units, denoted as P(xEO-yMO), and PEO. We first use 7Li and 19F pulsed-field-gradient NMR spectroscopy to measure cation and anion self-diffusion, respectively, in polymer/lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt mixtures. At 90 °C, we observe modest changes in Li+ diffusivity across all polymer compositions, while anion (TFSI–) self-diffusion coefficients decrease significantly with increasing MO content. At a given reduced temperature (T – Tg), all polyacetal electrolytes exhibit faster Li+ self-diffusion than PEO. Intriguingly, P(EO-MO) and P(EO-2MO) also show slower TFSI– anion self-diffusion than PEO at a given reduced temperature. Molecular dynamics simulations reveal that shorter distances between acetal oxygen atoms (O–CH2–O) compared to ether oxygens (O–CH2–CH2–O) promote more diverse, often asymmetric, Li+ coordination environments. Raman spectra reveal that anion-rich ion clusters in P(EO-MO) and P(EO-2MO) lead to decreased anion diffusivity, which along with increased cation diffusivity, support the viability of polyacetals as high-performance polymer electrolytes." @default.
- W3176250470 created "2021-07-05" @default.
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- W3176250470 date "2021-06-29" @default.
- W3176250470 modified "2023-10-01" @default.
- W3176250470 title "Modifying Li<sup>+</sup> and Anion Diffusivities in Polyacetal Electrolytes: A Pulsed-Field-Gradient NMR Study of Ion Self-Diffusion" @default.
- W3176250470 cites W1054371433 @default.
- W3176250470 cites W1124112037 @default.
- W3176250470 cites W1512287409 @default.
- W3176250470 cites W1581339821 @default.
- W3176250470 cites W1645500092 @default.
- W3176250470 cites W1674329897 @default.
- W3176250470 cites W1932772245 @default.
- W3176250470 cites W1965283108 @default.
- W3176250470 cites W1965335922 @default.
- W3176250470 cites W1969719681 @default.
- W3176250470 cites W1970832108 @default.
- W3176250470 cites W1972375226 @default.
- W3176250470 cites W1972630238 @default.
- W3176250470 cites W1972992646 @default.
- W3176250470 cites W1974350965 @default.
- W3176250470 cites W1976232918 @default.
- W3176250470 cites W1978764009 @default.
- W3176250470 cites W1989838337 @default.
- W3176250470 cites W1990196038 @default.
- W3176250470 cites W1992230200 @default.
- W3176250470 cites W1993768178 @default.
- W3176250470 cites W1996813465 @default.
- W3176250470 cites W1998062017 @default.
- W3176250470 cites W1998138720 @default.
- W3176250470 cites W1999746846 @default.
- W3176250470 cites W2001789700 @default.
- W3176250470 cites W2012172365 @default.
- W3176250470 cites W2014836882 @default.
- W3176250470 cites W2018723083 @default.
- W3176250470 cites W2019465613 @default.
- W3176250470 cites W2021239064 @default.
- W3176250470 cites W2022803091 @default.
- W3176250470 cites W2022854855 @default.
- W3176250470 cites W2023244266 @default.
- W3176250470 cites W2024517103 @default.
- W3176250470 cites W2028815423 @default.
- W3176250470 cites W2034091777 @default.
- W3176250470 cites W2039772638 @default.
- W3176250470 cites W2040206906 @default.
- W3176250470 cites W2041138772 @default.
- W3176250470 cites W2045480037 @default.
- W3176250470 cites W2047968138 @default.
- W3176250470 cites W2051815089 @default.
- W3176250470 cites W2052551423 @default.
- W3176250470 cites W2056370943 @default.
- W3176250470 cites W2062154132 @default.
- W3176250470 cites W2071660758 @default.
- W3176250470 cites W2071892892 @default.
- W3176250470 cites W2075569725 @default.
- W3176250470 cites W2075807440 @default.
- W3176250470 cites W2078207141 @default.
- W3176250470 cites W2080695754 @default.
- W3176250470 cites W2081894869 @default.
- W3176250470 cites W2082799399 @default.
- W3176250470 cites W2084035119 @default.
- W3176250470 cites W2084195394 @default.
- W3176250470 cites W2085892530 @default.
- W3176250470 cites W2087568888 @default.
- W3176250470 cites W2089122711 @default.
- W3176250470 cites W2089403233 @default.
- W3176250470 cites W2089525884 @default.
- W3176250470 cites W2092060262 @default.
- W3176250470 cites W2092158177 @default.
- W3176250470 cites W2094721753 @default.
- W3176250470 cites W2103797749 @default.
- W3176250470 cites W2108747877 @default.
- W3176250470 cites W2110395021 @default.
- W3176250470 cites W2136822440 @default.
- W3176250470 cites W2156140248 @default.
- W3176250470 cites W2169211003 @default.
- W3176250470 cites W2246477827 @default.
- W3176250470 cites W2312466277 @default.
- W3176250470 cites W2316299087 @default.
- W3176250470 cites W2320921362 @default.
- W3176250470 cites W2402798547 @default.
- W3176250470 cites W2515890517 @default.
- W3176250470 cites W2566271412 @default.