Hydrothermal-Assisted Sintering Strategy Towards Porous- and Hollow-Structured LiNb3O8 Anode Material

Nanoscale Research Letters

Chunjie Hu¹  Jien Yang¹  Liuyang Zheng¹  Haifa Zhai¹  Xiang Zhang¹  Hairui Liu¹  Hongjing Li¹  Qiling Li² 

[1] Henan Key Laboratory of Photovoltaic Materials, College of Physics and Materials Science, Henan Normal University;State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University;

关键词: LiNb3O8;    Anode;    Lithium-ion batteries;    Porous and hollow structure;   

DOI  :  10.1186/s11671-017-2234-2

来源: DOAJ

【 摘 要 】

Abstract Porous- and hollow-structured LiNb3O8 anode material was prepared by a hydrothermal-assisted sintering strategy for the first time. The phase evolution was studied, and the formation mechanism of the porous and hollow structure was proposed. The formation of the unique structure can be attributed to the local existence of liquid phase because of the volatilization of Li element. As the anode material, the initial discharge capacity is 285.1 mAhg−1 at 0.1 C, the largest discharge capacity reported so far for LiNb3O8. Even after 50 cycles, the reversible capacity can still maintain 77.6 mAhg−1 at 0.1 C, about 2.5 times of that of LiNb3O8 samples prepared by traditional solid-state methods. The significant improvement of Li storage capacity can be attributed to the special porous and hollow structure, which provides a high density of active sites and short parallel channels for fast intercalation of Li+ ions through the surface.

【 授权许可】

Unknown