Porous V2O5-SnO2/CNTs composites as high performance cathode materials for lithium-ion batteries

被引：27

作者：

Guo, Qi ^{[1
]}

Sun, Zhenhua ^{[1
]}

Gao, Man ^{[1
]}

Tan, Zhi ^{[1
]}

Zhang, Bingsen ^{[1
]}

Su, Dang Sheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2013年 / 22卷 / 02期

基金：

中国国家自然科学基金;

关键词：

lithium-ion battery; cathode; vanadium oxide; carbon nanotube; electrochemical energy storage; ELECTROCHEMICAL ENERGY-STORAGE; VANADIUM PENTOXIDE; CARBON NANOTUBES; HYDROTHERMAL SYNTHESIS; LI-INSERTION; ELECTRODES; OXIDE; V2O5; NANOCOMPOSITES; TEMPERATURE;

D O I：

10.1016/S2095-4956(13)60043-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Vanadium pentoxide (V2O5) exhibits high theoretical capacities when used as a cathode in lithium ion batteries (LIBs), but its application is limited by its structural instability as well as its low lithium and electronic conductivities. A porous composite of V2O5-SnO2/carbon nanotubes (CNTs) was prepared by a hydrothermal method and followed by thermal treatment. The small particles of V2O5, their porous structure and the coexistence of SnO2 and CNTs can all facilitate the diffusion rates of the electrons and lithium ions. Electrochemical impedance spectra indicated higher ionic and electric conductivities, as compared to commercial V2O5. The V2O5-SnO2/CNTs composite gave a reversible discharge capacity of 198 mAh.g(-1) at the voltage range of 2.05-4.0 V, measured at a current rate of 200 mA.g(-1), while that of the commercial V2O5 was only 88 mAh.g(-1), demonstrating that the porous V2O5-SnO2/CNTs composite is a promising candidate for high-performance lithium secondary batteries.

引用

页码：347 / 355

页数：9

共 33 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].