Department of Energy Engineering, Hanyang University, Seoul 133-791, South Korea.
Nano Lett. 2013 Jun 12;13(6):2971-5. doi: 10.1021/nl401439b. Epub 2013 May 23.
In this Letter we report an electrochemical and morphological study of the response of lithium-oxygen cells cycled at various temperatures, that is, ranging from -10 to 70 °C. The results show that the electrochemical process of the cells is thermally influenced in an opposite way, that is, by a rate decrease, due to a reduced diffusion of the lithium ions from the electrolyte to the electrode interface, at low temperature and a rate enhancement, due to the decreased electrolyte viscosity and consequent increased oxygen mobility, at high temperature. In addition, we show that the temperature also influences the crystallinity of lithium peroxide, namely of the product formed during cell discharge.
在这封信件中，我们报告了对在不同温度下循环的锂-氧电池的电化学和形态学响应的研究，温度范围为-10 至 70°C。结果表明，电池的电化学过程受到相反的热影响，即在低温下，由于锂离子从电解质向电极界面的扩散减少，导致反应速率降低，而在高温下，由于电解质粘度降低和氧气迁移率增加，导致反应速率提高。此外，我们还表明，温度也会影响过氧化锂的结晶度，即电池放电过程中形成的产物的结晶度。
