Improving Effect of Graphene on Electrochemical Properties of Fe2O3 Anode Materials

Metals

Guanglin Zhu¹  Ming Wang¹  Ganfeng Tu¹  Bo Gao¹  Haifeng Liu¹ 

[1] Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China;

关键词: iron oxides;    graphene;    anode;    lithium ion batteries;    electrochemical performance;   

DOI  :  10.3390/met12040593

来源: DOAJ

【 摘 要 】

Transition metal oxides have a high initial charge-discharge capacity of 800–1000 mAh/g, the electrochemical performance, cyclic performance and rate performance of the composite of transition metal oxide and graphene have been improved due to the unique two-dimensional structure and excellent electrical conductivity of graphene. In this paper, iron oxides materials with different morphs were prepared by different hydrothermal reaction temperatures, and rGO/Fe₂O₃-175 °C composites with different graphene ratios were synthesized and used in the anode of lithium ion batteries. The results show that nanorod-shaped Fe₂O₃ had better electrochemical performance than spherical Fe₂O₃. 0.2rGO/Fe₂O₃-175 °C had the best cyclic performance, the first cyclic discharge capacity reaches 1372 mAh/g under the current density of 100 mA/g, and the cyclic reversible capacity remained at about 435 mAh/g after 50 cycles, illustrating that nanorods Fe₂O₃ and graphene composites can greatly buffer the volume expansion of Fe₂O₃.

【 授权许可】

Unknown