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001     828996
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024 7 _ |a 10.1039/C6CP05276B
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100 1 _ |a Wiemers-Meyer, S.
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245 _ _ |a Mechanistic insights into lithium ion battery electrolyte degradation – a quantitative NMR study
260 _ _ |a Cambridge
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520 _ _ |a The changes in electrolyte composition on the molecular level and the reaction mechanisms of electrolyte degradation upon thermal aging are monitored by quantitative NMR spectroscopy, revealing similar rates of degradation for pristine and already aged electrolytes. The data analysis is not in favor of an autocatalytic reaction mechanism based on OPF3 but rather indicates that the degradation of LiPF6 in carbonate based solvents proceeds via a complex sequence of “linear” reactions rather than a cyclic reaction pattern which is determined by the amount of water present in the samples. All investigated electrolytes are reasonably stable at temperatures of up to 60 °C in the presence of minor amounts or absence of water hence indicating that chemical instability of electrolyte components against water is decisive for degradation and an increase in temperature (“thermal aging”) just accelerates the degradation impact of water.
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700 1 _ |a Winter, M.
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700 1 _ |a Nowak, S.
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773 _ _ |a 10.1039/C6CP05276B
|g Vol. 18, no. 38, p. 26595 - 26601
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