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US 2007/0178376 A1Published application
Lithium ion secondary battery and charge system therefor
AssigneePanasonic Corporation
InventorsMasato Fujikawa, Shinji Kasamatsu, Mikinari Shimada
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Abstract
A lithium ion secondary battery includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator interposed between the positive electrode and the negative electrode. The separator includes a polyolefin layer and an oxidation-resistant layer. The oxidation-resistant layer includes an oxidation-resistant polymer. A main chain of the oxidation-resistant polymer does not include a —CH2— group and a —CH(CH3)— group. The oxidation-resistant layer faces the positive electrode.
Claims7
A lithium ion secondary battery comprising:
- a positive electrode;
- a negative electrode;
- a non-aqueous electrolyte;
- and a separator interposed between said positive electrode and said negative electrode;
- wherein said separator comprises a polyolefin layer and an oxidation-resistant layer,
- said oxidation-resistant layer comprises an oxidation-resistant polymer, a main chain of said oxidation-resistant polymer not including a —CH2— group and not including a —CH(CH3)— group, and
- said oxidation-resistant layer faces said positive electrode.
4 more elements
A lithium ion secondary battery comprising:
- a positive electrode;
- a negative electrode;
- a non-aqueous electrolyte;
- and a separator interposed between said positive electrode and said negative electrode;
- wherein said separator comprises a polyolefin layer and an oxidation-resistant layer,
- said oxidation-resistant layer comprises an oxidation-resistant polymer, in an IR spectrum for said oxidation-resistant polymer, each height of absorption peaks attributable to C—H stretching vibration of a —CH2— group and attributable to C—C stretching vibration of a —CH(CH3)— group being 0% to 7% of the maximum value of heights of absorption peaks in a range of 500 to 3500 cm−1, and
- said oxidation-resistant layer faces said positive electrode.
4 more elements
Dependencies are inferred from the claim text.