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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Bulk-Sensitive Characterization of the Discharged Products in Li-O2 Batteries by Nonresonant Inelastic X-ray Scattering
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Bulk-Sensitive Characterization of the Discharged Products in Li-O2 Batteries by Nonresonant Inelastic X-ray Scattering

机译：非共振非弹性X射线散射对Li-O2电池中放电产物的体积敏感性表征

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摘要

Understanding the nature of discharged products is critical to identifying suitable electrolyte systems for Li—O2 batteries. We have employed nonresonant inelastic X-ray scattering (NIXS), which is a hard X-ray photon-in photon-out technique to monitor low energy core—shell excitations and to obtain bulk sensitive information on the solid discharged products in Li—O2 batteries using various electrolyte solvent/salt combinations. NDCS measurements were performed on cathodes after discharging the Li—O2 cells using low discharge current (～25 mA/g of carbon). NIXS results reveal that, even in cells containing current state-of-the-art electrolytes, the oxygen in the discharged products is bound predominantly to species other than a peroxide or lithia. This finding shows that electrolyte decomposition is a significant pathway during discharge of Li—U2 batteries using ether and oligoether substituted silane based electrolytes.
机译：了解放电产物的性质对于确定适用于Li-O2电池的电解质系统至关重要。我们采用了非共振非弹性X射线散射（NIXS），这是一种硬X射线光子输入光子输出技术，用于监测低能核-壳激发并获得有关Li-O2中固体放电产物的体积敏感信息使用各种电解质溶剂/盐组合的电池。使用低放电电流（〜25 mA / g碳）对Li-O2电池放电后，在阴极上进行NDCS测量。 NIXS结果表明，即使在包含当前最先进电解质的电池中，放电产物中的氧气也主要与除过氧化物或锂的物质结合。该发现表明，在使用醚和寡醚取代的硅烷基电解质的Li-U2电池放电期间，电解质分解是重要的途径。

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