7Li MRI of Li batteries reveals location of microstructural lithium
7Li MRI of Li batteries reveals location of microstructural lithium
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DOI：
10.1038/nmat3246
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发表时间：
2012-04-01
期刊：
影响因子：
41.2
通讯作者：
Jerschow, Alexej
中科院分区：
文献类型：
--
作者：
Chandrashekar, S.;Trease, Nicole M.;Jerschow, Alexej
人们对用于便携式电子产品的先进电池的需求不断增长，以为电动汽车提供动力，并促进来自可再生能源的能量的分配和存储（1，2）。对电池和其他电化学设备的需求不断增长，促使人们研究开发新的电极材料，以提高性能和降低成本（增加容量，稳定性和循环寿命以及安全性）（1-3）。这些发展反过来又促使人们积极寻求开发强大而可靠的诊断工具，以便在可能的情况下就地监测和分析电池性能（4-9）。然而，一种经过验证的、方便的、非侵入性的技术，能够在三维空间中对电池循环过程中发生的化学变化进行成像，目前还没有出现。在这里，我们展示了基于磁共振成像的技术，该技术能够对电池电极和电解质中发生的变化进行完全无创的可视化和表征。目前的应用集中在锂金属电池和观察电极微观结构的建立作为充电的结果。这里开发的方法将是非常有价值的，在寻求提高电池性能和其他电化学设备的评估。
There is an ever-increasing need for advanced batteries for portable electronics, to power electric vehicles and to facilitate the distribution and storage of energy derived from renewable energy sources(1,2). The increasing demands on batteries and other electrochemical devices have spurred research into the development of new electrode materials that could lead to better performance and lower cost (increased capacity, stability and cycle life, and safety)(1-3). These developments have, in turn, given rise to a vigorous search for the development of robust and reliable diagnostic tools to monitor and analyse battery performance, where possible, in situ(4-9). Yet, a proven, convenient and non-invasive technology, with an ability to image in three dimensions the chemical changes that occur inside a full battery as it cycles, has yet to emerge. Here we demonstrate techniques based on magnetic resonance imaging, which enable a completely non-invasive visualization and characterization of the changes that occur on battery electrodes and in the electrolyte. The current application focuses on lithium-metal batteries and the observation of electrode microstructure build-up as a result of charging. The methods developed here will be highly valuable in the quest for enhanced battery performance and in the evaluation of other electrochemical devices.