Electrochemical cell having an electrode with a dicarbonate additive in the electrode active mixture
申请人:WILSON GREATBATCH LTD.
公开号:EP1244159A1
公开(公告)日:2002-09-25
An electrochemical cell of either a primary or a secondary chemistry, is described. In either case, the cell has a negative electrode of lithium or of an anode material which is capable of intercalating and deintercalating lithium coupled with a positive electrode of a cathode active material. A dicarbonate compound is mixed with either the anode material or the cathode active material prior to contact with its current collector. The resulting electrode couple is activated by a nonaqueous electrolyte. The electrolyte flows into and throughout the electrodes causing the dicarbonate additive to dissolve in the electrolyte. The dicarbonate solute is then able to contact the lithium to provide an electrically insulating and ionically conducting passivation layer thereon.
本文介绍了一种初级或次级化学电化学电池。在这两种情况下,电池都有一个锂负极或一个能够夹层和脱层锂的阳极材料负极,以及一个阴极活性材料正极。在与集流器接触之前,先将碳酸氢盐化合物与正极材料或负极活性材料混合。由此产生的电极偶由非水性电解液激活。电解液流入电极并贯穿电极,使碳酸氢盐添加剂溶解在电解液中。然后,碳酸氢盐溶质能够与锂接触,在锂上形成电绝缘和离子导电的钝化层。