Adams & Wilks
Non-aqueous electrolyte secondary battery having heat-resistant electrodes
A non-aqueous electrolyte secondary battery capable of withstanding a reflow temperature has a positive electrode having a conductive material, a binder, and an electrode active material selected from the group consisting of LiCoO2, LiNiO2 and LiMn2O4. A negative electrode has a conductive material, a binder and an electrode active material selected from the group consisting of a titanium oxide having an anatase structure, lithium titanate having a spinel structure and a molybdenum oxide. An electrolyte has a supporting salt and a non-aqueous solvent having a boiling point greater than 200&deg; C. A gasket is comprised of a material having a heat deformation temperature greater than 230&deg; C. A separator is disposed between the positive electrode and the negative electrode and is comprised of a material having a heat deformation temperature greater than 230&deg; C. At least one of the positive electrode and the negative electrode comprises an electrode heat-treated to a temperature of 250&deg; C. to 450&deg; C. for deactivating a thermally active portion of each of the conductive material, the binder and the electrode active material thereof.
Seiko Instruments Inc.
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Shinichi Hideharu Toyoo Shunji Tsugio
Takasugi Onodera Harada Watanabe Sakai