Abstract We prepared electrodes of a variety of thicknesses with single-walled carbon nanotubes (SWCNTs) to investigate the effects of electrode thickness on various properties of LABs, including capacity and discharge voltage. The electrode thickness was easily controlled between 29 and 138 μm by adjusting the weight of the SWCNTs dispersed in methanol. From the results of discharge tests under the flow conditions of O2 at atmospheric pressure, it was revealed that the discharge capacity and voltage of the LABs varied depending on the electrode thickness. Notably, in the case of atmospheric pressure, the thinnest 30-μm electrode demonstrated three times higher capacity per unit weight compared with the 125-μm electrode. Moreover, the thinner electrodes also provided top performance with respect to discharge voltage. We also performed discharge tests under increased O2 pressure at 3 atm. In this case, the capacity also increased in relation to decreasing thickness of the electrode, though the trend was slightly different compared with that of the discharge tests carried out at atmospheric pressure. Although thickness is generally an essential parameter for electrochemical devices, it was further revealed here that thickness plays an important role in LABs with respect to the O2 concentration in the electrolyte.

中文翻译：

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单壁碳纳米管电极厚度对锂空气电池放电性能的影响

摘要 我们用单壁碳纳米管 (SWCNTs) 制备了各种厚度的电极，以研究电极厚度对 LABs 各种性能的影响，包括容量和放电电压。通过调节分散在甲醇中的单壁碳纳米管的重量，电极厚度很容易控制在 29 到 138 微米之间。从大气压下 O2 流动条件下的放电测试结果可以看出，LAB 的放电容量和电压随电极厚度而变化。值得注意的是，在大气压的情况下，与 125 微米电极相比，最薄的 30 微米电极的单位重量容量高出三倍。此外，更薄的电极还提供了最高的放电电压性能。我们还在 3 个大气压的 O2 压力下进行了放电测试。在这种情况下，容量也随着电极厚度的减小而增加，尽管与在大气压下进行的放电测试相比，这种趋势略有不同。尽管厚度通常是电化学装置的基本参数，但这里进一步揭示了厚度在 LAB 中就电解质中的 O2 浓度起重要作用。