Journal of Inorganic Materials, Volume. 36, Issue 11, 1137(2021)

Sodium Storage Behavior of Nanoporous Sb/MCNT Anode Material with High Cycle Stability by Dealloying Route

Fanxin ZENG... Chuang LIU and Yuliang CAO* |Show fewer author(s)
Author Affiliations
  • College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China
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    To improve the cycle performance of Sb-based anode materials for sodium storage, a simple two-step method (mechanical assisted chemical alloying and acid dissolution dealloying) is proposed to prepare nano sized and porous antimony/multi-walled carbon nanotubes (De-Sb/MCNT) composite. Different methods were employed to characterize the physicochemical and electrochemical properties of De-Sb/MCNT material as anode for sodium storage. The results show that compared to the Raw-Sb/MCNT obtained by direct ball milling of commercial raw Sb and MCNT, the De-Sb/MCNT material exhibits better cycle performance of sodium storage. At a current density of 200 mA·g-1, the De-Sb/MCNT delivers the reversible specific capacity of 408.6 mAh·g-1 with the initial Coulombic efficiency of 69.2%. After 330 cycles at 800 mA·g-1, the capacity retention rate can still retain 88%. The superior cycle performance of De-Sb/MCNT benefits from the “pre-pulverization” effect of mechanically-assisted chemical alloying/acid dissolution dealloying on commercial Sb, which promotes the nanocrystallization and porosity of the material. The De-Sb/MCNT relieves the volume expansion during charging and discharging, thus achieves excellent cycle stability. This dealloying process at ambient temperature is expected to provide a new approach for sodium storage of alloy anode materials with prolonged and stable cycles.

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    Fanxin ZENG, Chuang LIU, Yuliang CAO. Sodium Storage Behavior of Nanoporous Sb/MCNT Anode Material with High Cycle Stability by Dealloying Route[J]. Journal of Inorganic Materials, 2021, 36(11): 1137

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    Paper Information

    Category: RESEARCH ARTICLE

    Received: Feb. 21, 2021

    Accepted: --

    Published Online: Dec. 20, 2021

    The Author Email: CAO Yuliang (ylcao@whu.edu.cn)

    DOI:10.15541/jim20210105

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