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Advanced Materials

Engraving Copper Foil to Give Large-Scale Binder-Free Porous CuO Arrays for a High-Performance Sodium-Ion Battery Anode

Authors

  • Shuang Yuan,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
    2. Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun, P. R. China
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  • Xiao-lei Huang,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
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  • De-long Ma,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
    2. Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun, P. R. China
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  • Heng-guo Wang,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
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  • Fan-zhi Meng,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
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  • Xin-bo Zhang

    Corresponding author
    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
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Abstract

Arrays of aligned porous CuO nanorods are obtained by a facile and scalable method of engraving Cu foil in situ. Direct use of the arrays as a flexible and binder-free sodium-ion battery anode — without adding auxiliary materials — results in superior electrochemical performance, including cycle stability and rate capability, even at room temperature. This can be attributed to the unique array structure and the lack of binder in the electrode.

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