Toward High-Capacity Battery Anode Materials: Chemistry and Mechanics Intertwined
Toward High-Capacity Battery Anode Materials: Chemistry and Mechanics Intertwined
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DOI：
10.1021/acs.chemmater.0c02981
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发表时间：
2020-09
影响因子：
8.6
通讯作者：
M. McDowell;Francisco Javier Quintero Cortes;Akila C. Thenuwara;J. Lewis
中科院分区：
文献类型：
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作者：
M. McDowell;Francisco Javier Quintero Cortes;Akila C. Thenuwara;J. Lewis
锂金属和富锂合金是高容量阳极材料，可以提高可充电电池的能量含量。然而，它们的发展受到循环过程中快速容量衰减的阻碍，这是由这些材料及其界面在充电和放电过程中经历的大量结构、形态和体积转变驱动的。在这些转变过程中，化学/结构变化和固体力学之间的相互作用在确定电化学降解中起着决定性作用。该观点讨论了化学和力学如何相互关联，影响锂金属阳极和合金阳极的反应机制，稳定性和性能。考虑具有液体电解质和固态电解质的电池系统，因为每个系统中的化学力学的不同影响。在此基础上，我们讨论了控制和减轻这些材料中化学机械降解的新想法，以使其能够转化为商业系统，这可能导致开发出迫切需要为我们日益电气化的世界提供动力的高能电池。
Lithium metal and lithium-rich alloys are high-capacity anode materials that could boost the energy content of rechargeable batteries. However, their development has been hindered by rapid capacity decay during cycling, which is driven by the substantial structural, morphological, and volumetric transformations that these materials and their interfaces experience during charge and discharge. During these transformations, the interplay between chemical/structural changes and solid mechanics plays a defining role in determining electrochemical degradation. This Perspective discusses how chemistry and mechanics are interrelated in influencing the reaction mechanisms, stability, and performance of both lithium metal anodes and alloy anodes. Battery systems with liquid electrolytes and solid-state electrolytes are considered because of the distinct effects of chemo-mechanics in each system. Building on this knowledge, we present a discussion of emerging ideas to control and mitigate chemo-mechanical degradation in these materials to enable translation to commercial systems, which could lead to the development of high-energy batteries that are urgently needed to power our increasingly electrified world.