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Bai J, Wang K, Feng J, et al. ZnO/CoO and ZnCo2O4 Hierarchical Bipyramid Nanoframes: Morphology Control, Formation Mechanism, and Their Lithium Storage Properties. ACS Appl Mater Interfaces. 2015;7(41):22848-57doi: 10.1021/acsami.5b05303.
Bai, J., Wang, K., Feng, J., & Xiong, S. (2015). ZnO/CoO and ZnCo2O4 Hierarchical Bipyramid Nanoframes: Morphology Control, Formation Mechanism, and Their Lithium Storage Properties. ACS applied materials & interfaces, 7(41), 22848-57. https://doi.org/10.1021/acsami.5b05303
Bai, Jing, et al. "ZnO/CoO and ZnCo2O4 Hierarchical Bipyramid Nanoframes: Morphology Control, Formation Mechanism, and Their Lithium Storage Properties." ACS applied materials & interfaces vol. 7,41 (2015): 22848-57. doi: https://doi.org/10.1021/acsami.5b05303
Bai J, Wang K, Feng J, Xiong S. ZnO/CoO and ZnCo2O4 Hierarchical Bipyramid Nanoframes: Morphology Control, Formation Mechanism, and Their Lithium Storage Properties. ACS Appl Mater Interfaces. 2015 Oct 21;7(41):22848-57. doi: 10.1021/acsami.5b05303. Epub 2015 Oct 09. PMID: 26428259.
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ACS Appl Mater Interfaces. 2015 Oct 21;7(41):22848-57. doi: 10.1021/acsami.5b05303. Epub 2015 Oct 09.

ZnO/CoO and ZnCo2O4 Hierarchical Bipyramid Nanoframes: Morphology Control, Formation Mechanism, and Their Lithium Storage Properties.

ACS applied materials & interfaces

Jing Bai, Kaiqi Wang, Jinkui Feng, Shenglin Xiong

Affiliations

  1. Key Laboratory for Colloid and Interface Chemistry, Ministry of Education, and School of Chemistry and Chemical Engineering, Shandong University , Jinan 250100, P. R. China.
  2. Institute of Physical Chemistry, Zhejiang Normal University , Jinhua 321004, China.

PMID: 26428259 DOI: 10.1021/acsami.5b05303

Abstract

Mastery over the structure of nanoscale materials can effectively tailor and regulate their electrochemical properties, enabling improvement in both rate capability and cycling stability. We report the shape-controlled synthesis of novel mesoporous bicomponent-active ZnO/CoO hierarchical multilayered bipyramid nanoframes (HMBNFs). The as-synthesized micro/nanocrystals look like multilayered bipyramids and consist of a series of structural units with similar frames and uniform sheet branches. The use of an appropriate straight-chain monoalcohol was observed to be critical for the formation of HMBNFs. In addition, the structure of HMBNFs could be preserved only in a limited range of the precursor ratio. An extremely fast crystal growth process and an unusual transverse crystallization of the ZnCo-carbonate HMBNFs were newly discovered and proposed. By calcination of ZnCo-carbonate HMBNFs at the atmosphere of nitrogen and air, ZnO/CoO and ZnCo2O4 HMBNFs were obtained, respectively. Compared to the ZnCo2O4 HMBNFs, the ZnO/CoO HMBNFs with a uniform distribution of nanocrystal ZnO and CoO subunits exhibited enhanced electrochemical activity, including greater rate capability and longer cycling performance, when evaluated as an anode material for Li-ion batteries. The superior electrochemical performance of the ZnO/CoO HMBNFs is attributed to the unique nanostructure, bicomponent active synergy, and uniform distribution of ZnO and CoO phases at the nanoscale.

Keywords: anodes; bipyramid; lithium-ion batteries; nanoframes; synergistic effect

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