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

• DOI: 10.1007/s40820-019-0296-7
• Publication Date: 2019-08-02T11:19:50Z
• Authors: Huan Liu; Xin Zhang; Yifan Zhu; Bin Cao; Qizhen Zhu; Peng Zhang; Bin Xu; Feng Wu; Renjie Chen
• Keywords: MXenes

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