High-Performance Air Electrode for Li-Air Batteries

Abstract

Lithium-air batteries with the highest specific energy has become a hot research topic in the field of chemical power source. Among the components of lithium-air batteries, design and preparation of air electrode is a key factor for improving the performance of lithium-air batteries. A new catalyst of LaNiO₃ with high catalytic activity is prepared by a simple synthetic method. The experimental results show that the lithium-air battery with LaNiO₃ catalyst has a good charge-discharge performance, which discharge capacity is 1 109 mAh·g^-1 and discharge voltage platform is 2.59 V. The impact of two kinds of carbon materials (Super P and GNS) as the catalyst carrier on the charge-discharge performance of lithium air battery is studied in detail. It can be found that the porous structure of electrode is more advantageous to the improvement of performance of lithium-air battery. Furthermore, the necessity of controlling water content in the electrolyte(1 mol·L^-1 LiTFSI/TEGDME)is also discussed. A good cyclic performance of lithium air batteries with LaNiO₃/Super P air electrode can be obtained in an electrolyte (water content < 1×10^-5). The capacity retention of lithium air batteries after the fifth cycle is 96.21%. There is no obvious change for the voltage platform.

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	Xu Qian
	Xu Qiang
	Sang Lin
	Ding Fei
	Liu Xingjiang

Keywords： lithium-air battery； air electrode； carbon carrier； catalyst

Received 2015-04-14;

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Xu Qian, Xu Qiang, Sang Lin, Ding Fei, Liu Xingjiang.High-Performance Air Electrode for Li-Air Batteries[J] Chemcial Industry and Engineering, 2017,V34(4): 44-49

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