Invention Application
- Patent Title: METHOD OF PRODUCING AN ELECTRODE FOR A LITHIUM SECONDARY BATTERY, AND METHOD OF PRODUCING A LITHIUM SECONDARY BATTERY
- Patent Title (中): 生产锂二次电池的电极的方法和生产锂二次电池的方法
-
Application No.: US13316259Application Date: 2011-12-09
-
Publication No.: US20120079712A1Publication Date: 2012-04-05
- Inventor: Denis Yau Wai YU , Kazunori Donoue , Toshikazu Yoshida , Tetsuo Kadohata , Tetsuyuki Murata , Shigeki Matsuta
- Applicant: Denis Yau Wai YU , Kazunori Donoue , Toshikazu Yoshida , Tetsuo Kadohata , Tetsuyuki Murata , Shigeki Matsuta
- Priority: JP2007-050586 20070228; JP2007-136050 20070522; JP2007-177742 20070705; JP2008-008288 20080117
- Main IPC: H01M10/04
- IPC: H01M10/04 ; C01D15/00
Abstract:
A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.
Information query
