Flexible nonwoven ZrO2 ceramic membrane as an electrochemically stable and flame-resistant separator for high-power rechargeable batteries
Flexible nonwoven ZrO2 ceramic membrane as an electrochemically stable and flame-resistant separator for high-power rechargeable batteries
复制标题
柔性非织造 ZrO2 陶瓷膜作为高功率可充电电池的电化学稳定且阻燃的隔膜
DOI：
10.1016/j.cej.2020.124259
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发表时间：
2020-05-15
影响因子：
15.1
通讯作者：
Liu, Meilin
中科院分区：
文献类型：
--
作者：
Jing, Panpan;Liu, Mengting;Liu, Meilin
新一代可充电电池不仅应具有比传统电池更高的能量密度和更快的速率能力，而且还应环保，低成本和安全。作为可再充电电池最关键和最耐用的组件之一，现有技术的聚烯烃隔板在几种电池应用中不能充分发挥作用，特别是那些需要高电流密度和高温的应用。在此，我们报告了一种非织造氧化锆陶瓷膜，通过聚合物静电纺丝，然后通过高温有机燃烧的强大的微结构。所制备的ZrO2膜具有良好的机械柔韧性、多孔性、良好的电解液润湿性和渗透性、优异的耐热性和阻燃性以及较高的电化学惰性。当在锂或钠电池中进行测试时，ZrO2隔膜可以承受更高的电流密度，并且比最先进的隔膜具有更长的循环寿命。因此，在当前的工作中所示的ZrO2膜可以被代表为新一代安全、高功率电池的有前途的替代隔膜。
New-generation rechargeable batteries should not only have higher energy densities and faster rate capabilities than the exisiting ones, they should also be eco-friendly, low cost and safe. One of the most critical and enduring component of rechargeable batteries, the state-of-the-art polyolefin separators fail to perform sufficiently in several battery applications, notably those requiring high current densities and elevated temperatures. Herein, we report a nonwoven ZrO2 ceramic membrane with a robust nanofiber microstructure via polymeric electrospinning followed by a high-temperature organic burn-off. The as-synthesized ZrO2 membrane shows remarkable mechanical flexibility, ample porosity, excellent electrolyte wettability and infiltration, outstanding heat and flame-resistance, and high electrochemical inertness. When tested in a lithium or sodium battery, the ZrO2 separator can withstand higher current densities and have longer cycling lives than the state-of-the-art separators. Therefore, the ZrO2 membrane shown in the current work can be represented as a promising alternative separator for a new-generation of safe, high-power batteries.