Thursday, February 2, 2012

No. 427: A battery that integrates lithium ion capacitor and lithium air battery (February 3, 2012)

A research group of National Institute of Advanced Industrial Science and Technology (AIST) developed a battery that integrates lithium ion capacitor andlithium air battery that is expected to be the next-generation large capacity secondary battery. The research group developed a lithium air battery that used hybrid electrolyte made up of hydrogen and organic electrolyte two years ago. The latest battery is an integrated battery with a maximum output of 120 milliwatts per square centimeter, six times higher capacity exhibited by the lithium air battery developed two years ago. The research members told that it would be necessary to improve the solid electrolyte to be sandwiched between hydrogen and organic electrolyte before the newly developed integrated battery is turned into actual utilization. They plan to improve the new products for the application of EVs.  

It works as a lithium air battery in normal times, and the lithium ion capacitor mode starts automatically when more output is required. The lithium air battery enjoys great expectations as the next-generation secondary battery, but it has not been put into practical use because of the problems with output density and charge-discharge characteristics. The lithium ion capacitor is already in practical use, but it has a small capacity to store energy despite the high output density. Mitsubishi Electric successfully developed a battery that integrates lithium ion battery and lithium ion capacitor.

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