TY - JOUR AU - Liu, Huan AU - Zhang, Xin AU - Zhu, Yifan AU - Cao, Bin AU - Zhu, Qizhen AU - Zhang, Peng AU - Xu, Bin AU - Wu, Feng AU - Chen, Renjie PY - 2019/08/02 Y2 - 2024/03/29 TI - Electrostatic Self-assembly of 0D–2D SnO2 Quantum Dots/Ti3C2Tx MXene Hybrids as Anode for Lithium-Ion Batteries JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 11 IS - SE - Articles DO - 10.1007/s40820-019-0296-7 UR - https://www.nmlett.org/index.php/nml/article/view/175 SP - 65 AB - <p>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 SnO<sub>2</sub> quantum dots (QDs) on Ti<sub>3</sub>C<sub>2</sub>T<sub><em>x</em></sub> MXene sheets is proposed. The as-prepared SnO<sub>2</sub>/MXene hybrids have a unique 0D–2D structure, in which the 0D SnO<sub>2</sub> QDs (~ 4.7&nbsp;nm) are uniformly distributed over 2D Ti<sub>3</sub>C<sub>2</sub>T<sub><em>x</em></sub> MXene sheets with controllable loading amount. The SnO<sub>2</sub> QDs serve as a high capacity provider and the “spacer” to prevent the MXene sheets from restacking; the highly conductive Ti<sub>3</sub>C<sub>2</sub>T<sub><em>x</em></sub> MXene can not only provide efficient pathways for fast transport of electrons and Li ions, but also buffer the volume change of SnO<sub>2</sub> during lithiation/delithiation by confining SnO<sub>2</sub> QDs between the MXene nanosheets. Therefore, the 0D–2D SnO<sub>2</sub> QDs/MXene hybrids deliver superior lithium storage properties with high capacity (887.4&nbsp;mAh&nbsp;g<sup>−1</sup> at 50&nbsp;mA&nbsp;g<sup>−1</sup>), stable cycle performance (659.8&nbsp;mAh&nbsp;g<sup>−1</sup> at 100&nbsp;mA&nbsp;g<sup>−1</sup> after 100 cycles with a capacity retention of 91%) and excellent rate performance (364&nbsp;mAh&nbsp;g<sup>−1</sup> at 3&nbsp;A&nbsp;g<sup>−1</sup>), making it a promising anode material for lithium-ion batteries.</p><p>Highlights:</p><p>1 0D–2D SnO<sub>2</sub> quantum dots/MXene (SnO<sub>2</sub> QDs/MXene) hybrids were synthesized by electrostatic self-assembly.<br>2 MXene not only provides efficient pathways for fast transport of electrons and Li ions, but also buffers the volume change of SnO<sub>2</sub> during charge/discharge process.<br>3 The 0D–2D SnO<sub>2</sub> QDs/MXene hybrids deliver high capacity, excellent cycle and rate performances as anode of lithium-ion batteries.</p> ER -