Effect of Surface Properties of Carbon Nanotube Film on thePerformance of Lithium-air Batteries
Vol. 57, No. 2, pp. 113-124,
Apr. 2020
10.12772/TSE.2020.57.113
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Abstract
Lithium-air (Li-air) batteries, which use oxygen as an active material for the positive
electrode, have many advantages such as low weight, low pollution, and low cost compared
with commercial batteries. In this study, post-treatments, such as acid and heat
treatment, were conducted on carbon nanotube (CNT) films, which were fabricated via the
direct spinning method, to change the surface properties of the CNT films. The posttreated
CNT films were used as positive electrodes for Li-air batteries to investigate the
effect of post-treatment on the performance of Li-air batteries. The raw CNT film showed a
high capacity of 7000 mAh/g after 18 cycles. The acid-treated and heat-treated CNT films
exhibited improved cycling performance compared with the raw CNT film. It is known that
the performance of the Li-air battery is affected by the morphology and functional group
of the CNT film electrode.
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