High-capacity polymeric Li-ion cell and its production method

Details High-capacity polymeric Li-ion cell and its production method High-capacity polymeric Li-ion cell and its production method

2006-02-07

2006-02-07

Ruthkosky, Mark (Department: 1745)

Metal working

Method of mechanical manufacture

Electrical device making

C029S623100, C429S236000, C429S245000, C429S231300

Reexamination Certificate

active

06994737

ABSTRACT:
This invention is related to a process for preparing polymeric Li-ion cell with high-capacity as well as the cells manufactured with the process. The process produces anode paste with lithium salt and cobalt oxide and sprays the paste onto aluminum current collector to form the anode; produces cathode paste with two lithium-embedded carbon materials and sprays the paste to copper current collector to form the cathode; produces a paste with polyvinylidene fluoride, silicon dioxide (gas phase), o-dibutyl phthalate ester, and acetone and sprays the paste onto a polyester film to form the diaphragm; performs extraction for the cell assembled with said anode, diaphragm, and cathode, welds lugs, immerses the cell into electrolyte to, and packs the cell with aluminum-plastic composite film, and finally performs formation for the cell, so that a polymeric Li-ion cell with high-capacity is accomplished. Owing that this invention employs special electrode paste composition and special manufacturing technique, the charging/discharging performance of the cell is enhanced, and the cell is more suitable for power supply. The thickness of the cell can be controlled within 3 mm; thus the cell is especially ideal for power supply of electric vehicles.

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