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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A novel self-assembled-derived 1D MnO2@Co3O4 composite as a high-performance Li-ion storage anode material
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A novel self-assembled-derived 1D MnO2@Co3O4 composite as a high-performance Li-ion storage anode material

机译：一种新型自组装衍生的1D MNO2 @ CO3O4复合材料，为高性能锂离子储存阳极材料

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Manganese dioxide (MnO2) is a high-performance anodic material and applied widely in lithium-ion batteries (LIBs). However, some intrinsic limitations originate from the low ionic conductivity, high polarization, and severe volume expansion of this type of material. In this work, we generated a one-dimensional porous MnO2@Co3O4 composite from a MnOOH@ZIF-67 precursor, which is synthesized via a self-assembly strategy. The one-dimensional porous structure provided more active sites and shorter-ion/electron-diffusion distance, thereby enabling higher Li+ storage capacity and better rate capability than a transition metal oxide alone. The Co3O4 coating buffered the volume change during Li+ insertion/extraction, leading to increased cycling stability of the electrode. When evaluated as the anode of LIBs, MnO2@Co3O4 exhibited a reversible capacity of 647 mA h g(-1) at 2000 mA g(-1) after 400 cycles. This excellent performance indicated that the MnO2@Co3O4 material could be an attractive potential candidate for Li+ storage.
机译：二氧化锰（MNO2）是一种高性能阳极材料，广泛应用于锂离子电池（LIBS）。然而，一些内在的限制源自低离子电导率，高偏振和这种材料的严重体积膨胀。在这项工作中，我们从Mnooh @ ZIF-67前体产生一维多孔MNO2 @ CO3O4复合材料，其通过自组装策略合成。一维多孔结构提供了更多的活性位点和更短的离子/电子扩散距离，从而使得能够高于单独的过渡金属氧化物的Li +储存容量和更好的速率能力。 Co3O4涂层缓冲Li +插入/提取期间的体积变化，从而提高电极的循环稳定性。当评估为LIBS的阳极时，MNO2 @ CO3O4在400次循环后在2000 mA G（-1）时表现出647mA H（-1）的可逆容量。这种优异的性能表明MNO2 @ CO3O4材料可能是Li +储存的有吸引力的潜在候选者。

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