Li Hui, Su Zixue
School of Environment and Energy, South China University of Technology, Guangzhou, 510006, P. R. China.
Langmuir. 2022 May 10;38(18):5738-5743. doi: 10.1021/acs.langmuir.2c00351. Epub 2022 Apr 25.
Porous NHCoF mesocrystalline cuboids with highly exposed {100} facets are grown by in situ reaction of products produced by high field anodization of cobalt metal foil, via a nonclassical crystallization process involving oriented particle aggregation. 3D nano-micro hierarchical CoO cuboids are obtained by thermal annealing of NHCoF mesocrystals. The microstructure and morphology of products are characterized by electron microscopy and X-ray diffraction. The combination of small nanoparticle subunits, micrometer-sized overall particles, and porous structure provides the obtained hierarchical CoO cuboids with large electrolyte-electrode contact areas, channels for large lithium ion flux, pore accessibility, and structural stability, leading to excellent rate and cyclic performance as lithium-ion battery (LIB) anodes.
通过钴金属箔的高场阳极氧化产物的原位反应，经由涉及定向颗粒聚集的非经典结晶过程，生长出具有高度暴露{100}晶面的多孔NHCoF介晶长方体。通过对NHCoF介晶进行热退火获得三维纳米-微米级分层CoO长方体。通过电子显微镜和X射线衍射对产物的微观结构和形态进行表征。小纳米粒子亚基、微米级整体颗粒和多孔结构的组合为所获得的分层CoO长方体提供了大的电解质-电极接触面积、大锂离子通量的通道、孔隙可及性和结构稳定性，从而使其作为锂离子电池（LIB）阳极具有优异的倍率性能和循环性能。
