期刊
NANO ENERGY
卷 62, 期 -, 页码 401-409出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.05.062
关键词
Lithium ion battery; Sn/SnOx; MXene; Anode material; Confinement effect; Synergistic effect
类别
资金
- National Natural Science Foundation of China (NSFC) [51572300]
This study presents a nanostructured Sn/SnOx@Ti3C2 composite by in-situ growth of Sn/SnOx nanoparticles on the interlayer of 2D MXene (Ti3C2Tx) nanosheets through facile electrostatic attraction and liquid phase reduction. X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy results illustrate that Sn/SnOx nanoparticles are uniformly distributed into the MXene (Ti3C2Tx) interlayer, forming a sandwich-like nanostructured composite. MXene (Ti(3)C(2)Tx) nanosheets suppress Sn/SnOx nano-particles' volume expansion and agglomeration and accelerate the Li-ion and electron transition due to the distinguished confinement effect and excellent graphite-like layered structure. Furthermore, Sn/SnOx nano-particles are embedded as pillars to enhance the longitudinal structural stability of MXene matrix by preventing the re-stacking of nanosheets during lithium insertion/extraction. The nanosized particles still reduce lithium migration path and increase active areas. Therefore, the Sn/SnOx@Ti3C2 composite maintains 594.2 mAh g(-1) after 200 cycles with a capacity recovery after 100 cycles. The synergistic effect of Sn/SnOx on MXene facilitates Sn/SnOx@Ti3C2 nanostructures, thereby exhibiting excellent electrochemical properties for lithium-ion batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据