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用于镁离子电池的超临界流体中MgCoO和MgNiO纳米晶体的快速合成。

Rapid synthesis of MgCoO and MgNiO nanocrystals in supercritical fluid for Mg-ion batteries.

作者信息

Truong Quang Duc, Kobayashi Hiroaki, Honma Itaru

机构信息

Ceramics and Biomaterials Research Group, Advanced Institute of Materials Science, Ton Duc Thang University Ho Chi Minh City Vietnam

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University Katahira, 2-1-1, Aobaku Sendai 980-8577 Japan

出版信息

RSC Adv. 2019 Nov 11;9(63):36717-36725. doi: 10.1039/c9ra04936c.

DOI:10.1039/c9ra04936c
PMID:35539043
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9075127/
Abstract

Magnesium metal complex oxides are potential electrode materials for magnesium ion batteries with high specific capacities. However, the strong electrostatic interaction between Mg and the host lattice due to its divalency induces slow intercalation kinetics of Mg ions within the crystal lattices. Thus, nanocrystalline particles with shortened Mg ion diffusion distance enable the insertion/extraction of Mg ions and improve the specific capacities of the batteries. Herein, we report the facile rapid production of crystalline MgCoO and MgNiO nanocrystals by rapid supercritical fluid processing. The phase transition from spinel to rocksalt during the Mg ion intercalation has been confirmed by high-resolution transmission electron microscopy. The nanosheets of MgNiO rocksalt nanocrystals were controllably synthesized for the first time, which are active materials for magnesium-ion batteries.

摘要

镁金属复合氧化物是具有高比容量的镁离子电池的潜在电极材料。然而，由于镁的二价性，镁与主体晶格之间存在强烈的静电相互作用，导致镁离子在晶格内的嵌入动力学缓慢。因此，具有缩短的镁离子扩散距离的纳米晶体颗粒能够实现镁离子的嵌入/脱出，并提高电池的比容量。在此，我们报道了通过快速超临界流体处理简便快速地制备结晶态的MgCoO和MgNiO纳米晶体。高分辨率透射电子显微镜已证实了在镁离子嵌入过程中从尖晶石到岩盐的相变。首次可控合成了MgNiO岩盐纳米晶体的纳米片，其是镁离子电池的活性材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/59051b6d19d9/c9ra04936c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/f7bfa15d641e/c9ra04936c-s1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/63f8b347e1b9/c9ra04936c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/ad57fee22f17/c9ra04936c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/59051b6d19d9/c9ra04936c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/f7bfa15d641e/c9ra04936c-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/e690a994f179/c9ra04936c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/14e103173e33/c9ra04936c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/bab6b03eadad/c9ra04936c-f3.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/63f8b347e1b9/c9ra04936c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/ad57fee22f17/c9ra04936c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ad57/9075127/59051b6d19d9/c9ra04936c-f7.jpg

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