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Ionic liquid-derivatized hierarchical N-doped carbon-coated Co3O4 nanosheet array as high-performance anode materials for lithium-ion batteries

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Abstract

A novel nitrogen-doped carbon-coated graded Co3O4 nanosheets (NDC/Co3O4 NS) is synthesized by using a simple ionic liquid hydrothermal method. The as-prepared NDC/Co3O4 NS is composed of hexagonal nanosheets having different orientation and the thickness of 50–100 nm. Significantly, as an anode electrode for lithium-ion batteries (LIBs), the NDC/Co3O4 NS performed excellent cyclability. The NDC/Co3O4 NS delivers an initial discharge capacity of 1281.4 mAh g−1 at 445 mA g−1 and maintains a reversible high capacity of 929.4 mAh g−1 after 50 cycles, much higher than the unmodified Co3O4 nanosheets (230 mAh g−1). The superior excellent electrochemical performance can be attributed to the gradient structure and the nitrogen-doped carbon coating resulting in shorter ion transport distances and good electrical conductivity.

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Acknowledgements

The project was supported by the National Natural Science Foundation of China (Grant Nos. 51364024, 51404124).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China

    Ruinian Li, Yanshuang Meng, Qianru Hu & Fuliang Zhu

  2. Department of Manufacturing Engineering, Georgia Southern University, Statesboro, GA, 30458, USA

    Yue Zhang

  3. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou, 730050, China

    Fuliang Zhu

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Li, R., Meng, Y., Hu, Q. et al. Ionic liquid-derivatized hierarchical N-doped carbon-coated Co3O4 nanosheet array as high-performance anode materials for lithium-ion batteries. J Mater Sci: Mater Electron 31, 4997–5007 (2020). https://doi.org/10.1007/s10854-020-03066-7

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