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1、So far, all the mathematical models used for determining the charge–discharge behavior of electrode materials are based on the assumption that the charge–discharge process is controlled by diffusion. 迄今为止,用于确定电极材料充放电行为的所有数学模型都是以以下假设为基础的,即充放电过程是受扩散控制的。However, recent results show that the phase trans- formation of electrodes (for example graphite anode) may con- trol the charge–discharge process of the electrodes especially at the initial stage [14] because the stress and stain induced by phase transformation decreases the rate of phase transformation
2、[15]. 可是最近的结果表明,电极(例如石墨阳极)的相变可能控制电极的充放电过程,特别是在初始阶段【14】,因为由相变感生的应力和应变是相变的速率降低【15】。It is found that the electrodes with the low volume change during Li insertion/extraction have a high rate capability. For example, the Li4 Ti5 O12 with almost zero volume change has excellent rate capability due to the fast phase transformation. Therefore, the phase transformation may play an important role in charge–discharge process of electrode.人们发现,在锂附着/萃取过程中立即变化小的电极具有较高的速率能力。例如,体积变化几乎为零的Li4 Ti5 O12因为有快速的相变,就具有优异的速率能力。因此,相变在电极的充放电过程中可以起重要的作用。
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