PURPOSE: To enhance operating voltage, capacity, high-rate discharging characteristic, and the oxygen gas absorbing performance at charging, by fabricating a neg. electrode using a specific hydrogen storage alloy, and upon assembly of a battery, allowing the alloy to initiate cracks within the battery to specify the mean particle dia.
CONSTITUTION: A neg. electrode is fabricated from a hydrogen storage alloy having a mean particle dia. from 50 to 120μm, and a battery is assembled with this neg. electrode. Within this battery crackes are generated in the alloy to make the mean particle dia. of alloy below 50μm. Accordingly the reacting surface area of the alloy increases, and an active alloy section is exposed to the surface to enhance the reactivity of negative electrode. Thereby the working voltage when battery is discharging at a low temp. or with high rate can be enhanced, and generation of hydrogen gas in the later period of charging be suppressed by means of quick charging, and the absorbing performance for oxygen gas generated from the pos. electrode at the time of charging be improved.
| WO/2005/093879 | ANODE DESIGN FOR A PRISMATICALLY WOUND LiMnO2 CELL |
| JPH08339803 | MANUFACTURE OF BATTERY ELECTRODE AND DEVICE |
NAKAHORI SHINSUKE
TOMITA MASAHITO
