Copyright © 2013 NTT. All Rights Reserved. <Contact>[email protected] N－27 Lithium air battery High-Energy-Density Secondary Battery for Achieving Long-Time Backup of Telecommunication Facilities ■ Metal air batteries can be discharged by using O 2 in air. ■ Metal air batteries can be discharged for a very long time, because O 2 (positive active material) is always provided to the batteries and negative active materials are stored in them. ■ Many organizations have been developing rechargeable metal air batteries. Lithium air batteries are a possible candidate as secondary metal battery with the highest energy density. ■ Lithium air batteries have less need for expensive materials (Li, Co, etc.) than lithium ion batteries (LIBs). ■ Making telecommunication infrastructures more tolerant to major disasters through the use of high-energy-density batteries to provide longer back-up time for supplying electric power to telecommunication facilities. Features Application Scenarios NTT Group Global Advantage Lithium air batteries are being actively researched as one of the post-LIB candidates. NTT has been researching original catalysts used for the positive reaction to improve the battery performance factors such as the discharge-charge property. NTT installs back-up systems for providing electric power for telecommunication facilities to maintain telecommunication service even in case of power outages. Since the Great East Japan Earthquake, back-up time has needed to be extended to withstand power outages. To help meet this need, we have been developing lithium air batteries that can be discharged for a very long time. Energy & Environment Battery Negative ele. Positive ele. Voltage (V) Theoretical energy density (Wh/kg) Lithium air Li Air (O 2 ) 3.1 5574 Lithium ion Carbon LiCoO 2 3.7 600 Pb acid Pb PbO 2 2.1 241 Li Li O Li + O 2 O 2 O 2 Li + Li + Negative electrode (-) Positive electrode (+) e - e - Electrode (active) material, voltage, theoretical energy density of various secondary batteries Carbon, catalyst Separator O Li metal Electrolyte Energy & Environment

High-Energy-Density Secondary Battery for Achieving N 27

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Page 1: High-Energy-Density Secondary Battery for Achieving N 27

<Contact>[email protected]

N－27

Lithium air battery

High-Energy-Density Secondary Battery for Achieving Long-Time Backup of Telecommunication Facilities

■ Metal air batteries can be discharged by using O2 in air. ■ Metal air batteries can be discharged for a very long time,

because O2 (positive active material) is always provided to the batteries and negative active materials are stored in them.

■ Many organizations have been developing rechargeable metal air batteries. Lithium air batteries are a possible candidate as secondary metal battery with the highest energy density.

■ Lithium air batteries have less need for expensive materials (Li, Co, etc.) than lithium ion batteries (LIBs).

■ Making telecommunication infrastructures more tolerant to major disasters through the use of high-energy-density batteries to provide longer back-up time for supplying electric power to telecommunication facilities.

Features

Application Scenarios

NTT Group Global Advantage Lithium air batteries are being actively researched as one of the post-LIB candidates. NTT has been researching original catalysts used for the positive reaction to improve the battery performance factors such as the discharge-charge property.

NTT installs back-up systems for providing electric power for telecommunication facilities to maintain telecommunication service even in case of power outages. Since the Great East Japan Earthquake, back-up time has needed to be extended to withstand power outages. To help meet this need, we have been developing lithium air batteries that can be discharged for a very long time.

Energy & Environment

Battery Negative ele. Positive ele. Voltage (V) Theoretical energy density (Wh/kg)

Lithium air Li Air (O2) 3.1 5574

Lithium ion Carbon LiCoO2 3.7 600

Pb acid Pb PbO2 2.1 241

Li O

Li+

Negative electrode (-) Positive electrode (+)

Electrode (active) material, voltage, theoretical energy density of various secondary batteries

Carbon, catalyst

Separator

Li metal Electrolyte