Department of Advanced Materials Engineering, Kyonggi University, 154-42, Gwanggyosan-Ro, Yeongtong-Gu, Suwon-Si, Gyeonggi-Do, Republic of Korea.
Sci Rep. 2017 Aug 17;7(1):8610. doi: 10.1038/s41598-017-09219-9.
We herein report the preparation of carbon nanotube (CNT)/CoO nanocomposites selectively coated with polyaniline (PANI) via an electropolymerization method, for use as an effective electrode material for Li-air (Li-O) batteries. The CoO catalyst attached to the CNTs facilitated the dissociation of reaction products and reduced the overpotential of the cells. As the carbon surface activates the side reactions, the PANI coating on the carbon surface of the electrode suppressed the side reaction at the electrode/LiO and electrode/electrolyte interfaces, thus enhancing the cycle performance of the electrode. In addition, the catalytic activity of CoO on the CNT/CoO nanocomposites remained unaffected, as the CoO surface was not covered with a PANI layer due to the nature of the electropolymerization method. Overall, the synergic effect of the PANI layer and the CoO catalyst leads to a superior cyclic performance and a low overpotential for the electrode based on selectively PANI-coated CNT/CoO nanocomposites.
我们在此通过电聚合方法报告了选择性涂覆有聚苯胺 (PANI) 的碳纳米管 (CNT)/CoO 纳米复合材料的制备，将其用作锂空气 (Li-O) 电池的有效电极材料。附着在 CNT 上的 CoO 催化剂促进了反应产物的离解并降低了电池的过电势。由于碳表面激活了副反应，因此电极表面的 PANI 涂层抑制了电极/LiO 和电极/电解质界面的副反应，从而提高了电极的循环性能。此外，由于电聚合方法的性质，CoO 表面未被 PANI 层覆盖，因此 CNT/CoO 纳米复合材料上 CoO 的催化活性不受影响。总体而言，PANI 层和 CoO 催化剂的协同作用导致基于选择性涂覆有 PANI 的 CNT/CoO 纳米复合材料的电极具有优异的循环性能和低过电势。
