A vanadium-based cathode for lithium-ion batteries

• Published in: Journal of the Electrochemical Society Vol. 147; no. 10; pp. 3575 - 3578
• Main Authors: CHALONER-GILL, Benjamin, SHACKLE, Dale R, ANDERSEN, Terrell N
• Format: Journal Article
• Language: English
• Published: Pennington, NJ Electrochemical Society 2000
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Ternary compound; Lithium Oxides; Secondary cell; Electrode material; X ray diffraction; Vanadium Oxides; Discharge; Organic solvent; Battery; Electrode life; Lithium Hexafluophosphates; Long lasting; Specific capacity; Electrical characteristic
• ISSN: 0013-4651; 1945-7111
• DOI: 10.1149/1.1393941

A vanadium-based oxide system has been developed as a cathode for use in a lithium-ion battery. The lithiated material was made in two steps, i.e. making a Li-V-O compound and introducing lithium into the intercalation host by reducing the V(V) with S2- ions in the form of lithium sulphide. The stoichiometry of the final product corresponds approximately to Li4V3O7.9. This material has shown excellent resistance to dissolution in 1M LiPF6 ethylene carbonate/dimethyl carbonate electrolyte. The capacity of the material cycling at a C/3 rate over the voltage range of 3.8-2.0 V is about 220 mAh/g. Li4V3O7.9 has demonstrated some stability in an ambient environment. This new cathode is capable of storing large amounts of energy, 630 mWh/g. Li4V3O7.9 has also exhibited long cycle life, greater than 100 deep discharge cycles compared to lithium metal. 21 refs.