The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2012
Filed:
Nov. 11, 2008
Katsutoshi Takeda, Moriguchi, JP;
Yoshio Kato, Moriguchi, JP;
Shingo Tode, Moriguchi, JP;
Masanori Maekawa, Moriguchi, JP;
Shigeki Matsuta, Moriguchi, JP;
Katsutoshi Takeda, Moriguchi, JP;
Yoshio Kato, Moriguchi, JP;
Shingo Tode, Moriguchi, JP;
Masanori Maekawa, Moriguchi, JP;
Shigeki Matsuta, Moriguchi, JP;
SANYO Electric Co., Ltd., Moriguchi, Osaka, JP;
Abstract
A method for producing a non-aqueous electrolyte secondary cell by preparing a positive electrode by applying a positive electrode mixture onto a positive electrode core material, the mixture containing a positive electrode active material mainly made of a lithium nickel composite oxide and a binding agent containing polyvinylidene fluoride; measuring the amount of carbon dioxide gas generated when a layer of the positive electrode mixture is removed out of the positive electrode and the layer is heated to 200° C. or higher and 400° C. or lower in an inactive gas atmosphere; selecting a positive electrode satisfying the following formulas:<(1.31−258)/1000000(200≦<300)  formula 3<1.20−225/1000000(300≦≦400)  formula 4where x is a heating temperature (° C.) and y is the amount of carbon dioxide gas (mole/g) per 1 g of the lithium nickel composite oxide measured; and preparing the non-aqueous electrolyte secondary cell by using the positive electrode selected.