Katsunori Yanagida

7335446, Feb 26, 2008

Feb 23, 2005

11/064112

Takanobu Chiga - Kobe, JP
Katsunori Yanagida - San Diego CA, US
Atsushi Yanai - Kobe, JP
Yoshinori Kida - Kobe, JP

SANYO Electric Co., Ltd. - Osaka

H01M 4/58

4292313, 4292311, 4292315, 4292316

Cycle performance is improved without degrading initial efficiency of a non-aqueous electrolyte secondary battery that includes a positive electrode, a negative electrode, a non-aqueous electrolyte containing a solute and a solvent, the positive electrode including a positive electrode active material made of a lithium-containing transition metal oxide that contains lithium and cobalt and has a layered structure. The lithium-containing transition metal oxide is at least partially covered with a surface-treatment layer containing a phosphate compound represented by the chemical formula MPO, where Mis at least one element that can have a valency of 3 and k is an integer in a range of 2 to 4, and the lithium-containing transition metal oxide contains a group IVA element Mand a group IIA element Mof the periodic table.

20040224230, Nov 11, 2004

Mar 9, 2004

10/795454

Katsunori Yanagida - San Diego CA, US
Atsushi Yanai - Kobe-city, JP
Yoshinori Kida - Kobe-city, JP
Takaaki Ikemachi - Kobe-city, JP
Toshiyuki Nohma - Kobe-city, JP
Takeshi Ogasawara - Scotland, GB

H01M004/58
H01M010/40

429/231800, 429/330000, 429/331000

A lithium cell includes a positive electrode, a negative electrode employing a carbon material as an active material, and a non-aqueous electrolyte including a solute dissolved in a non-aqueous solvent, and is characterized in that the carbon material in the negative electrode has an Rvalue (I/I) of 0.05 or more, the Rvalue calculated from a peak intensity (I) of a broad peak Phaving a full width at half maximum of 100 cmor more and a peak intensity (I) in the vicinity of 1580 cmas determined by laser Raman spectroscopy using an argon ion laser having a wavelength of 514.5 nm, the peak intensity (I) determined from a peak Pin the vicinity of 1360 cm, as determined by the aforesaid laser Raman spectroscopy, which is separated into the broad peak Phaving the full width at half maximum of 100 cmor more and a peak Phaving a full width at half maximum of less than 100 cm.

20050053838, Mar 10, 2005

Jul 23, 2004

10/897409

Takeshi Ogasawara - Fife, GB
Katsunori Yanagida - San Diego CA, US
Atsushi Yanai - Kobe-city, JP
Yoshinori Kida - Kobe-city, JP
Toshiyuki Nohma - Kobe-city, JP

H01M004/52
H01M010/40

429231300, 429329000, 429337000, 429231600, 429231500

Storage performance in a charged state is improved in a non-aqueous electrolyte battery that contains 10 volume % or more of γ-butyrolactone, which is highly safe and reliable, as a solvent. A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material composed of a lithium-containing transition metal oxide containing lithium and cobalt, a negative electrode, and a non-aqueous electrolyte solution composed of a solute and a solvent. The solvent contains 10 volume % or more of γ-butyrolactone with respect to the total solvent, and the positive electrode active material contains a Group IVA element and a Group IIA element of the periodic table.

20050233222, Oct 20, 2005

Mar 11, 2005

11/077504

Katsunori Yanagida - San Diego CA, US
Takanobu Chiga - Kobe-city, JP
Atsushi Yanai - Kobe-city, JP
Yoshinori Kida - Kobe-city, JP

H01M010/40
H01M004/58

429324000, 429231950, 429200000

Charge-discharge characteristics are improved in a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte containing a phosphoric ester compound as a solvent. In a non-aqueous electrolyte for secondary batteries containing a phosphoric ester compound, a lithium salt having an oxalato complex as an anion is contained as a solute. Preferably, the non-aqueous electrolyte contains lithium bis(oxalato)borate at a concentration of 0.01 to 0.2 mol/L with respect to the solvent, and more preferably, the non-aqueous electrolyte also contains vinylene carbonate.