Thursday, May 31, 2012

No. 524: Lithium-ion battery is growing higher in performance (May 31, 2012)

A research team made up of scientists from National Institute of Advanced Industrial Science and Technology (AIST) and Toray successfully developed a new lithium-ion battery. The new product can store 1.5 times more electrical energy than the existing lithium-ion battery of the same size. In addition, it can be used in a temperature range between minus 30 to plus 140 degrees centigrade, and it has rather high degree of safety. Should it be employed by an electric vehicle, it can lengthen the travel distance per change from 200 km to 300 km.  

The research team changed the material of some components. They used silicon oxide resistant to 800 degrees centigrade instead of graphite for anode, stainless steel instead of copper foil for collector, and polyimide for separator. Production cost remains almost the same. In the test, discharge and charge was successfully repeated at 140 degrees centigrade, and more than 58% of the performance was exhibited at minus 30 degrees centigrade. The test confirmed that employing silicon oxide increases the safety of anode and makes the lithium-ion battery hard to break even if it is given an impact. The research team plans to put the new lithium-ion battery into practical use for various applications including electric vehicle at an early date.  

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