Lee Chan Kyu, Park Yong Joon
Department of Advanced Materials Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 443-760, Korea.
Nanoscale Res Lett. 2015 Dec;10(1):1027. doi: 10.1186/s11671-015-1027-8. Epub 2015 Aug 12.
In this study, to fabricate a carbon free (C-free) air electrode, Co3O4 nanofibers were grown directly on a Ni mesh to obtain Co3O4 with a high surface area and good contact with the current collector (the Ni mesh). In Li-air cells, any C present in the air electrode promotes unwanted side reactions. Therefore, the air electrode composed of only Co3O4 nanofibers (i.e., C-free) was expected to suppress these side reactions, such as the decomposition of the electrolyte and formation of Li2CO3, which would in turn enhance the cyclic performance of the cell. As predicted, the Co3O4-nanofiber electrode successfully reduced the accumulation of reaction products during cycling, which was achieved through the suppression of unwanted side reactions. In addition, the cyclic performance of the Li-air cell was superior to that of a standard electrode composed of carbonaceous material.
在本研究中，为制备无碳（C-free）空气电极，将Co3O4纳米纤维直接生长在镍网上，以获得具有高表面积且与集流体（镍网）良好接触的Co3O4。在锂空气电池中，空气电极中存在的任何碳都会促进不需要的副反应。因此，仅由Co3O4纳米纤维组成的空气电极（即无碳）有望抑制这些副反应，如电解质的分解和Li2CO3的形成，这反过来会提高电池的循环性能。如所预测的，Co3O4纳米纤维电极在循环过程中成功减少了反应产物的积累，这是通过抑制不需要的副反应实现的。此外，锂空气电池的循环性能优于由碳质材料组成的标准电极。
