| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte which improves battery safety by suppressing risks of rupture, ignition or explosion of a battery when the battery is overcharged due to uncontrolled conditions such as A malfunction of a charger or when the battery is exposed to high temperature, which can suppress swelling, and which can prevent deterioration in formation standard capacity and cycle life characteristics of the battery. <P>SOLUTION: The nonaqueous electrolyte comprises an organic solvent, a lithium salt, a benzyl biphenyl based compound represented by formula 1, a hydride thereof or a mixture thereof, where R<SB>1</SB>, R<SB>2</SB>, R<SB>3</SB>, R<SB>4</SB>, R<SB>5</SB>, R<SB>6</SB>, R<SB>7</SB>, R<SB>8</SB>, R<SB>9</SB>, R<SB>10</SB>, R<SB>11</SB>, R<SB>12</SB>, R<SB>13</SB>and R<SB>14</SB>are the same or different, and are independently hydrogen, hydroxy, halogen, a 1-10C alkyl, a 1-10C alkoxy, nitro or amine group, and n is an integer between 1 and 10. The nonaqueous electrolyte forms a polymer due to its oxidative decomposition even if there is an increase in voltage due to overcharge of the battery, thereby protecting the battery. <P>COPYRIGHT: (C)2003,JPO |
