In this study, we present a new aprotic solvent, 2,4-dimethoxy-2,4-dimethylpentan-3-one (DMDMP), which is designed to resist nucleophilic attack and hydrogen abstraction by reduced oxygen species. Li-O2 cells using DMDMP solutions were successfully cycled. By various analytical measurements, we showed that even after prolonged cycling only a negligible amount of DMDMP was degraded. We suggest that the observed capacity fading of the Li-O2 DMDMP-based cells was due to instability of the lithium anode during cycling. The stability toward oxygen species makes DMDMP an excellent solvent candidate for many kinds of electrochemical systems which involve oxygen reduction and assorted evaluation reactions.

中文翻译：

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2,4-二甲氧基-2,4-二甲基戊烷-3-one：一种专为提高 Li-O2 电池稳定性而设计的非质子溶剂

在这项研究中，我们提出了一种新的非质子溶剂，2,4-二甲氧基-2,4-二甲基戊烷-3-酮 (DMDMP)，旨在抵抗亲核攻击和还原氧的夺氢。使用 DMDMP 溶液的 Li-O2 电池成功循环。通过各种分析测量，我们表明即使在长时间循环后也只有微不足道的 DMDMP 降解。我们认为，观察到的基于 Li-O2 DMDMP 的电池容量衰减是由于锂阳极在循环过程中的不稳定性。对氧物种的稳定性使 DMDMP 成为许多涉及氧还原和各种评估反应的电化学系统的优秀溶剂候选者。