Non-aqueous electrolyte secondary battery
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYasuhiko Bito, Masaki Hasegawa, Shuji Ito, Hiroyuki Murai, Yoshinori Toyoguchi
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Abstract
A non-aqueous electrolyte secondary battery comprises rechargeable positive and negative electrodes and a non-aqueous electrolyte. The positive electrode comprises at least one selected from LiCo0.sub.2, LiMn.sub.2 0.sub.4 and LiNi0.sub.2 and the negative electrode consists most of alkai metals such as lithium, etc. The non-aqueous electrolyte contains lithium salts and has concentration ranging from 0.002 to 1.0 mol/liter of at least one acid anhydride selected from acetic anhydride, benzoic anhydride, succinic anhydride, phtalic anhydride and maleic anhydride.
Claims3
A non-aqueous electrolyte secondary battery, comprising:
- a rechargeable positive electrode and a rechargeable negative electrode;
- and
- a non-aqueous electrolyte including a lithium salt, an acid anhydride selected from the group consisting of benzoic anhydride, phthalic anhydride and maleic anhydride, wherein said acid anhydride is included in a concentration ranging from 0.002 to 1.0 mol/liter, and at least one solvent selected from the group consisting of organic carbonates and organic esters,
- and further wherein the capacity holding rate of said battery is greater than 80% following storage of said battery at 60.degree. C. for four weeks.
Dependencies are inferred from the claim text.