TY - JOUR
AU - Ye Hong
AU - Wenfeng Mao
AU - Qianqian Hu
AU - Shiyong Chang
AU - Dejun Li
AU - Jingbo Zhang
AU - Gao Liu
AU - Guo Ai
AB - <p>SnO<sub>2</sub> is one of the promising anode materials for the next-generation lithium-ion batteries due to its high theoretical capacity. The main challenges of SnO<sub>2</sub> include large volume change during cycling, partially reversibility between SnO<sub>2</sub> and Sn, and unstable solid-electrolyte interphase. Herein, we demonstrate a novel structure design of SnO<sub>2</sub>-based anode, in which SnO<sub>2</sub> nanoparticles are embedded in a hierarchical porous carbon framework and further coated by the uniform Nitrogen-doped carbon layer. The hierarchical porous carbon framework can provide void space for the SnO<sub>2</sub> expansion, while the Nitrogen-doped carbon coating can act as a buffer layer to reduce the amount of irreversible solid-electrolyte interphase. This peculiar structure can also build highly conductive network, and promote the reversible conversion from Sn to SnO<sub>2</sub> by preventing the agglomeration of the intermediate Sn product. Therefore, the obtained SnO<sub>2</sub>@HPC@NC composite exhibits remarkable electrochemical performance with a high specific capacity of 1100 mAh g<sup>−1</sup> after 100 cycles at 0.1 A g<sup>−1</sup> and superior long-term stability over 500 cycles at 1 A g−1.</p>
BT - Journal of Power Sources
DA - 07/2019
DO - 10.1016/j.jpowsour.2019.04.093
LA - eng
N2 - <p>SnO<sub>2</sub> is one of the promising anode materials for the next-generation lithium-ion batteries due to its high theoretical capacity. The main challenges of SnO<sub>2</sub> include large volume change during cycling, partially reversibility between SnO<sub>2</sub> and Sn, and unstable solid-electrolyte interphase. Herein, we demonstrate a novel structure design of SnO<sub>2</sub>-based anode, in which SnO<sub>2</sub> nanoparticles are embedded in a hierarchical porous carbon framework and further coated by the uniform Nitrogen-doped carbon layer. The hierarchical porous carbon framework can provide void space for the SnO<sub>2</sub> expansion, while the Nitrogen-doped carbon coating can act as a buffer layer to reduce the amount of irreversible solid-electrolyte interphase. This peculiar structure can also build highly conductive network, and promote the reversible conversion from Sn to SnO<sub>2</sub> by preventing the agglomeration of the intermediate Sn product. Therefore, the obtained SnO<sub>2</sub>@HPC@NC composite exhibits remarkable electrochemical performance with a high specific capacity of 1100 mAh g<sup>−1</sup> after 100 cycles at 0.1 A g<sup>−1</sup> and superior long-term stability over 500 cycles at 1 A g−1.</p>
PY - 2019
SP - 44 
EP -  52
ST - Journal of Power Sources
T2 - Journal of Power Sources
TI - Nitrogen-doped carbon coated SnO<sub>2</sub> nanoparticles embedded in a hierarchical porous carbon framework for high-performance lithium-ion battery anodes
VL - 428
SN - 03787753
ER -