Core–Sheath Structured MoO<sub>3</sub>@MoS<sub>2</sub> Composite for High-Performance Lithium-Ion Battery Anodes
Shupeng Zhao, Zhenlong Zha, Xie Liu, Haoxiang Tian, Zhengying Wu, Wanfei Li, Lin‐Bing Sun, Bo Liu, Zhigang Chen
Abstract
Layer-structured MoO3 with a high theoretical specific capacity is a promising lithium-ion battery (LIB) anode alternative material. However, the poor electrical conductivity and pulverization during the Li+ insertion/extraction processes limit its practical application. Herein, we designed a core–sheath MoO3@MoS2 composite via in situ growth of few-layered MoS2 nanoflakes on the surface of the biotemplated MoO3. X-ray powder diffraction (XRD) results indicate that the preferred growth orientation of MoO3 crystals was altered under the induction of petal biotemplates. The layer-reduced MoO3 and the highly dispersed MoS2 provide abundant active sites. The unique core–sheath structure alleviates volume expansion of the electrode material. The electrochemical measurements results show that the composite possesses a high specific capacity (1545 mAh/g) and Coulombic efficiency (above 98%) after 150 cycles, as well as a better conductivity. Besides, the MoO3@MoS2 composite presents a stable rate performance under a current density of 100–1000 mA/g. Our work indicates that MoO3@MoS2 composite might be a good candidate as an anode material.