Layered double hydroxides (LDHs), known as typical two-dimensional materials with unique physicochemical properties, are regarded as promising candidates in energy storage fields. However, some inherent defects, such as poor conductivity and limited active sites, hinder the further development of LDHs. Recently, various functionalization strategies (e.g., intercalation of guest molecules; metal ions doping and defect introduction of host layer; exfoliation to monolayer; hybridization with functional materials; construction of hierarchical structure; interface engineering and phase transformation) have been used to modify the characteristics of LDHs, which provides guidance for designing novel nanomaterials. In this review, we discuss how these strategies improve the properties of LDH-based materials, which are expected to possess high electronic and ionic conductivity, high specific surface area and high mechanical and chemical stability etc. Moreover, the application of LDH-based materials in advanced energy conversion and storage techniques, including metal-ions batteries, lithium-sulfur batteries and metal-air batteries, have been comprehensively summarized.

中文翻译：

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层状双氢氧化物功能化用于可充电电池

层状双氢氧化物（LDH）被称为典型的二维材料，具有独特的物理化学性质，被认为是储能领域有前途的候选材料。然而，一些固有的缺陷，如导电性差和活性位点有限，阻碍了LDH的进一步发展。最近，各种功能化策略（例如，客体分子的嵌入；金属离子​​掺杂和主体层的缺陷引入；剥离至单层；与功能材料的杂化；层次结构的构建；界面工程和相变）已被用于改变特性LDH 的研究，为设计新型纳米材料提供了指导。在这篇综述中，我们讨论了这些策略如何改善LDH基材料的性能，使其具有高电子和离子电导率、高比表面积以及高机械和化学稳定性等。此外，LDH基材料的应用全面总结了金属离子电池、锂硫电池和金属空气电池等先进能源转换和存储技术。