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Porous V2O5-SnO2/CNTs composites as high performance cathode materials for lithium-ion batteries
Q. Guo; Z. H. Sun; M. Gao; Z. Tan; B. S. Zhang; D. S. Su
2013
Source PublicationJournal of Energy Chemistry
ISSN2095-4956
Volume22Issue:2Pages:347-355
AbstractVanadium 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.
description.department[guo, qi ; sun, zhenhua ; gao, man ; tan, zhi ; zhang, bingsen ; su, dang sheng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china. ; sun, zh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china. ; zhsun@imr.ac.cn ; dangsheng@fhi-berlin.mpg.de
KeywordLithium-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
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71232
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Q. Guo,Z. H. Sun,M. Gao,et al. Porous V2O5-SnO2/CNTs composites as high performance cathode materials for lithium-ion batteries[J]. Journal of Energy Chemistry,2013,22(2):347-355.
APA Q. Guo,Z. H. Sun,M. Gao,Z. Tan,B. S. Zhang,&D. S. Su.(2013).Porous V2O5-SnO2/CNTs composites as high performance cathode materials for lithium-ion batteries.Journal of Energy Chemistry,22(2),347-355.
MLA Q. Guo,et al."Porous V2O5-SnO2/CNTs composites as high performance cathode materials for lithium-ion batteries".Journal of Energy Chemistry 22.2(2013):347-355.
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