Facile synthesis of Bi2MoO6/reduced graphene oxide composites as anode materials towards enhanced lithium storage performance

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:518

Article

Zhai, Xiangang¹  Gao, Jianping¹  Xue, Ruinan¹  Xu, Xiaoyang²  Wang, Luyao¹  Tian, Qiang¹  Liu, Yu¹ 

[1] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China

[2] Hebei Univ Sci & Technol, Sch Chem & Pharmaceut Engn, Shijiazhuang, Hebei, Peoples R China

关键词: Bismuth molybdate;    Reduced graphene oxide;    Hydrothermal approach;    Lithium-ion batteries;    Anode materials;   

DOI  :  10.1016/j.jcis.2018.02.012

来源: Elsevier

【 摘 要 】

Bi2MoO6/reduced graphene oxide (Bi2MoO6/rGO) composites were fabricated by a facile one-pot hydrothermal approach, in which Bi2MoO6 nanosheets and rGO were simultaneously obtained. The structure and composition of the as-synthesized Bi2MoO6 and Bi2MoO6/rGO materials were characterized via FT-IR, BET, TGA, XRD, TEM, SEM and XPS analyses, and the electrochemical performance of Bi2MoO6/rGO as an anode in a lithium-ion battery was investigated. Compared with pristine Bi2MoO6, the Bi2MoO6/rGO composites have higher capacities, better cycle stability and higher rates. For a current density of 100 mA g(-1), the initial discharge capacities of the Bi2MoO6/rGO-20 and pristine Bi2MoO6 were 1049.6 mAh g-1 and 528.5 mAh g(-1), respectively. After 100 cycles, the capacity retention for the Bi2MoO6/rGO-20 and pristine Bi2MoO6 were respectively 80.4% and 30.7% using the 2nd cycle capacities (895.8 and 402.4 mAh g(-1)) as references. The enhanced electrochemical performance can be ascribed to the synergistic effect of the (BiMoO6)-Mo-2 and rGO sheets, which dramatically improves the conductivities of the Bi2MoO6/rGO anodes. In addition, the rGO sheets also supply electron transfer routes for the anode and suppress volume changes of Bi2MoO6 nanosheets during the charge-discharge cycles. (C) 2018 Elsevier Inc. All rights reserved.

【 授权许可】

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