POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, ITS PROCESS OF MANUFACTURE AND LITHIUM SECONDARY BATTERY USING THE POSITIVE ELECTRODE

• Main Authors: MIYATA ICHIJI, SASAMOTO SAYAKA, KISHI FUMIHIKO, TSUBATA HIDEKI, OMOMO YOSHITOMO
• Format: Patent
• Language: English
• Published: 07.10.2004
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To manufacture a positive electrode, in which carbon black as conductive assistant can be microfabricated in a short period of time, carbon black-containing dispersion with stable dispersed state is obtained and a lithium secondary battery with superior cycling property is provided at high capacity by using the carbon black-containing dispersion. SOLUTION: The carbon black-containing dispersion is obtained by using polyvinylpyrrolidone as a dispersant and having the carbon black-containing dispersion prepared by having the carbon black as the conductive auxiliary dispersed in solvent by a high pressure jet mill, and is combined with at least positive electrode active material containing lithium to prepare positive electrode film coating material. The obtained positive electrode film coating material is applied to a collector, the lithium secondary battery positive electrode is manufactured by going through a drying process, and the lithium secondary battery is constituted by using the positive electrode. COPYRIGHT: (C)2005,JPO&NCIPI