Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 126, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2021.107025
Keywords
Antimonene; Porous materials; Electrochemical exfoliation; Sodium-ion battery; Quaternary ammonium salt
Categories
Funding
- National Natural Science Foundation of China [21805211, 51862033]
- Science and Technology Foundation of Guizhou Province [JC[2018]1164, JC[2018]1165, PTRC[2017]5604]
- Department of Education of Guizhou Province [KY[2018]030]
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Stable porous antimonene sheets with mesopores ranging from 2 to 50 nm have been successfully fabricated through electrochemical exfoliation, showing high specific capacity and retention even at fast charge/discharge rates when utilized as anode materials for sodium-ion batteries.
Porous antimony has attracted wide attention in the area of energy storage as it can accommodate large volume change and facilitate Na+ ions diffusion. Herein, stable porous antimonene sheets with mesopores ranging from 2 to 50 nm have successfully fabricated through electrochemical exfoliation of layered bulk antimony rod in tetramethylammonium hydroxide aqueous solution with the aid of large TMA+ cations insertion and strong alkaline electrolyte environment. When utilized as anode materials for sodium-ion batteries, the as-exfoliated porous antimonene can deliver a high specific capacity of 569.1 mAh g-1 upon 200 cycles at 100 mA g-1, and it can still keep a high capacity of 277.8 mAh g-1 even at fast charge/discharge rate of 5000 mA g- 1.
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