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arXiv 2204.04525cond-mat.mtrl-sci
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插层材料的晶体学设计

Crystallographic design of intercalation materials

Ananya Renuka Balakrishna

摘要:

插层材料是可逆能量存储的有希望的候选材料,并且例如用作锂电池电极、储氢化合物和电致变色材料。阻止这些材料更广泛使用的一个重要问题是,它们在嵌入期间经历结构转变(高达~10%的晶格应变),这使材料膨胀,使微裂纹成核,并最终导致材料失效。除了晶格的结构转变之外,插层材料的晶体织构在控制离子传输性质、产生相分离微结构以及与晶体缺陷弹性相互作用方面起关键作用。在这篇综述中,我提供了一个概述的晶格,相变微结构和晶体缺陷的结构转变如何影响的化学机械性能的插层材料。在每一节中,我确定了晶体学设计层间化合物以提高其性能和寿命的关键挑战和机会。我主要从文献中引用用于可再充电电池的嵌入阴极的实例,然而,所识别的挑战和机遇可转移到更广泛的层间化合物。

英文摘要:

Intercalation materials are promising candidates for reversible energy storage and are, for example, used as lithium-battery electrodes, hydrogen-storage compounds, and electrochromic materials. An important issue preventing the more widespread use of these materials is that they undergo structural transformations (of up to ~10% lattice strains) during intercalation, which expand the material, nucleate microcracks, and, ultimately, lead to material failure. Besides the structural transformation of lattices, the crystallographic texture of the intercalation material plays a key role in governing ion-transport properties, generating phase separation microstructures, and elastically interacting with crystal defects. In this review, I provide an overview of how the structural transformation of lattices, phase transformation microstructures, and crystallographic defects affect the chemo-mechanical properties of intercalation materials. In each section, I identify the key challenges and opportunities to crystallographically design intercalation compounds to improve their properties and lifespans. I predominantly cite examples from the literature of intercalation cathodes used in rechargeable batteries, however, the identified challenges and opportunities are transferable to a broader range of intercalation compounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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