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| Posted Apr 6, 2005 PT |
Toshiba develops lithium-ion battery capable of recharging in one minute
Toshiba has created a lithium-ion battery that can recharge 80 percent of its energy in one minute. The feat is about 60 times faster than conventional lithium-ion batteries. The new battery is envisioned to be used in cell phones but its first application is in cars that need fast recharging times and big cycle times.
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Original news summary: (http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=159907938)
- Toshiba Corp. has developed a lithium-ion battery the company said features the short rechargeable time of capacitors and the energy capacity of conventional lithium-ion batteries.
- Toshiba's new battery can recharge 80 percent of the battery's energy capacity in one minute, approximately 60 times faster than the typical Li-ion batteries.
- It could be used for mobile phones in the future, but we put the priority on applications such as automobiles that require quick recharging time and large cycle time," said Norio Takami, Laboratory leader of Advanced Functional Materials laboratory at Toshiba's Corporate Research and Development Center.
- According to Takami, the battery shows less than 1 percent deterioration in capacity after 1,000 cycles of discharging and recharging.
- The battery employs a cobalt-based anode and a non-carbon material cathode in place of carbon material that is used for conventional lithium ion batteries, but Toshiba calls it a lithium ion battery because the electric charge movement depends on lithium ion.
- Toshiba achieved the breakthrough by using nanoparticles of several hundred nanometers coated uniformly on the negative electrode and newly developed electrolytic solution.
- With the stable electrolyte solution, the battery discharges 80 percent of its capacity at minus 40 degrees centigrade, compared to 100 percent discharge at 25 degrees centigrade for conventional Li-ion batteries.
- In the high temperature operation, Toshiba reported that the capacity deteriorates by only 5 percent at temperatures of 45 degrees centigrade after 1,000 cycles of discharging and recharging.
- The battery's voltage, which Toshiba did not disclose, is lower than the 3.6 volts of present lithium ion batteries.
- Producing the battery may be complicated, however, by Toshiba closing its Li-ion battery subsidiary AT Battery last December, and selling the battery plants to Sanyo Electric Co.
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