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Correlating Morphological Evolution of Li Electrodes with Degrading Electrochemical Performance of Li/LiCoO2 and Li/S Battery Systems: Investigated by Synchrotron X-ray Phase Contrast Tomography
ACS Energy Letters ( IF 19.3 ) Pub Date : 2018-01-11 00:00:00 , DOI: 10.1021/acsenergylett.7b01254 Fu Sun 1 , Markus Osenberg 1, 2 , Kang Dong 1, 2 , Dong Zhou 1, 2 , André Hilger 2 , Charl J. Jafta 3 , Sebastian Risse 3 , Yan Lu 3, 4 , Henning Markötter 1 , Ingo Manke 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2018-01-11 00:00:00 , DOI: 10.1021/acsenergylett.7b01254 Fu Sun 1 , Markus Osenberg 1, 2 , Kang Dong 1, 2 , Dong Zhou 1, 2 , André Hilger 2 , Charl J. Jafta 3 , Sebastian Risse 3 , Yan Lu 3, 4 , Henning Markötter 1 , Ingo Manke 1
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Efficient Li utilization is generally considered to be a prerequisite for developing next-generation energy storage systems (ESSs). However, uncontrolled growth of Li microstructures (LmSs) during electrochemical cycling has prevented its practical commercialization. Herein, we attempt to understand the correlation of morphological evolution of Li electrodes with degrading electrochemical performances of Li/LiCoO2 and Li/S systems by synchrotron X-ray phase contrast tomography technique. It was found that the continuous transformation of the initial dense Li bulk to a porous lithium interface (PLI) structure intimately correlates with the gradually degrading overall cell performance of these two systems. Additionally, the formation mechanism of the PLI and its correlation with previously reported inwardly growing LmS and the lithium-reacted region have been intensively discussed. The information that we gain herein is complementary to previous investigations and may provide general insights into understanding of degradation mechanisms of Li metal anodes and also provide highly needed guidelines for effective design of reliable next-generation Li metal-based ESSs.
中文翻译：
锂电极的形态演变与Li / LiCoO 2和Li / S电池系统的电化学性能下降之间的关系：同步加速器X射线相衬层析成像技术的研究
通常，有效利用锂是开发下一代储能系统（ESS）的先决条件。但是，电化学循环过程中Li微结构（LmSs）的不受控制的生长阻止了其实际的商业化。在这里，我们试图了解锂电极的形态演变与降解的Li / LiCoO 2的电化学性能之间的关系。和Li / S系统采用同步加速器X射线相衬层析成像技术。已经发现，最初的致密Li本体向多孔锂界面（PLI）结构的连续转变与这两个系统的整体电池性能逐渐下降密切相关。另外，已经深入地讨论了PLI的形成机理及其与先前报道的向内生长的LmS和锂反应区域的相关性。我们从本文中获得的信息是对先前研究的补充，可以为了解锂金属阳极的降解机理提供一般性见识，还为有效设计可靠的下一代基于锂金属的ESS提供了迫切需要的指导。
更新日期：2018-01-11
中文翻译：
锂电极的形态演变与Li / LiCoO 2和Li / S电池系统的电化学性能下降之间的关系：同步加速器X射线相衬层析成像技术的研究
通常，有效利用锂是开发下一代储能系统（ESS）的先决条件。但是，电化学循环过程中Li微结构（LmSs）的不受控制的生长阻止了其实际的商业化。在这里，我们试图了解锂电极的形态演变与降解的Li / LiCoO 2的电化学性能之间的关系。和Li / S系统采用同步加速器X射线相衬层析成像技术。已经发现，最初的致密Li本体向多孔锂界面（PLI）结构的连续转变与这两个系统的整体电池性能逐渐下降密切相关。另外，已经深入地讨论了PLI的形成机理及其与先前报道的向内生长的LmS和锂反应区域的相关性。我们从本文中获得的信息是对先前研究的补充，可以为了解锂金属阳极的降解机理提供一般性见识，还为有效设计可靠的下一代基于锂金属的ESS提供了迫切需要的指导。
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