| 摘要 |
<p>PCT No. PCT/DK95/00502 Sec. 371 Date Sep. 19, 1997 Sec. 102(e) Date Sep. 19, 1997 PCT Filed Dec. 11, 1995 PCT Pub. No. WO96/18215 PCT Pub. Date Jun. 13, 1996A new non-aqueous electrolyte system for use in batteries, capacitors and electrochromic displays, and consisting essentially of an alkali or ammonium salt, a solvent mixture, and optionally a polymer is disclosed. The new system is characterized in that the solvent mixture comprises a mixture of ethylene carbonate (EC) and -valerolactone (-VL), optionally containing one or more additional solvents selected from other organic carbonates, other lactones, esters and glymes, said system optionally being confined a separator. The electrolyte system can be applied in a broad voltage range, has a conductivity higher than 10-3 S/cm at room temperature, and shows a high stability against reduction. The improved stability towards reduction is mirrored in a cycling efficiency which is superior to the cycling efficiency of known non-aqueous electrolyte systems.</p> |
