Nano-Micro Letters

Electrostatic Self-Assembly of 0D-2D SnO2 Quantum Dots/Ti3C2Tx MXene Hybrids as Anode for Lithium-Ion Batteries

Huan Liu1, #, Xin Zhang2, #, Yifan Zhu2, Bin Cao2, Qizhen Zhu2, Peng Zhang2, Bin Xu2,*, Feng Wu1, Renjie Chen1,*

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Nano-Micro Lett. (2019) 11: 65

First Online: 02 August 2019 (Article)


*Corresponding author. E-mail: chenrj@bit.edu.cn (R. Chen); binxumail@163.com (B. Xu)





MXenes, a new family of two dimensional (2D) materials with excellent electronic conductivity and hydrophilicity, have shown distinctive advantages as a highly conductive matrix material for lithium-ion battery anodes. Herein, a facile electrostatic self-assembly of SnO2 quantum dots (QDs) on Ti3C2Tx MXene sheets is proposed. The as-prepared SnO2/MXene hybrids have a unique 0D-2D structure, in which the 0D SnO2 QDs (~4.7 nm) are uniformly distributed over 2D Ti3C2Tx MXene sheets with controllable loading amount. The SnO2 QDs serve as a high capacity provider and the “spacer” to prevent the MXene sheets from restacking; the highly conductive Ti3C2Tx MXene can not only provide efficient pathways for fast transport of electrons and Li ions, but also buffer the volume change of SnO2 during lithiation/delithiation by confining SnO2 QDs between the MXene nanosheets. Therefore, the 0D-2D SnO2 QDs/MXene hybrids deliver superior lithium storage properties with high capacity (887.4 mAh g-1 at 50 mA g-1), stable cycle performance (659.8 mAh g-1 at 100 mA g-1 after 100 cycles with a capacity retention of 91%) and excellent rate performance (364 mAh g-1 at 3 A g-1), making it a promising anode material for lithium-ion batteries.



Mxene; SnO2; Quantum dots; 0D-2D hybrid; Lithium-ion battery

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