Li-ion batteries are widely used in various applications, but their performance is limited by the stability and capacity of the separator. Developing a separator that can prevent thermal runaway and provide additional capacity is a significant challenge in battery research. In this study, a novel method of applying a Lithium titanate (LTO) active coating on the separator of Li-ion batteries is proposed. The LTO active coating can participate in electrochemical reactions and provide additional capacity. The active coating also improves the separator stability by preventing thermal shrinkage and enhancing thermal stability. The active coating has little impact on the Li-ion diffusion, and enables fast and stable battery performance at high C rates. The separator with active coating exhibits the highest ionic conductivity of 1.45 mS/cm, the lowest thermal shrinkage of 1.1% at 160 °C, and the highest capacity of 80.2 mAh/g at 15 C among the tested separators. This method offers a simple and effective way to enhance the performance of Li-ion batteries.

中文翻译：

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具有活性涂层的隔膜，适用于快速稳定的锂离子电池

锂离子电池广泛应用于各种应用，但其性能受到隔膜的稳定性和容量的限制。开发一种可以防止热失控并提供额外容量的隔膜是电池研究中的一个重大挑战。在这项研究中，提出了一种在锂离子电池隔膜上涂覆钛酸锂（LTO）活性涂层的新方法。 LTO活性涂层可以参与电化学反应并提供额外的容量。活性涂层还通过防止热收缩和增强热稳定性来提高隔膜的稳定性。活性涂层对锂离子扩散的影响很小，并且能够在高倍率下实现快速稳定的电池性能。在测试的隔膜中，带有活性涂层的隔膜表现出最高的离子电导率（1.45 mS/cm）、最低的160℃热收缩率为1.1%、以及最高的15C容量（80.2mAh/g）。该方法为提高锂离子电池的性能提供了一种简单有效的方法。