Microwave Processed, Onionlike Carbon and Fluoropolymer Passivated Lithium Metal Electrode for Enhanced Li Stripping/Plating Performance
Microwave Processed, Onionlike Carbon and Fluoropolymer Passivated Lithium Metal Electrode for Enhanced Li Stripping/Plating Performance
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DOI：
10.1021/acsaem.9b01416
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发表时间：
2019-10
影响因子：
6.4
通讯作者：
Kewei Liu;Yanfeng Xia;Chung-fu Cheng;Xuhui Xia;Feng Zou;B. Vogt;Yu Zhu
中科院分区：
文献类型：
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作者：
Kewei Liu;Yanfeng Xia;Chung-fu Cheng;Xuhui Xia;Feng Zou;B. Vogt;Yu Zhu
锂金属电极的一个关键限制是它们形成枝晶的倾向，这限制了它们在商业电池中的使用。在此，证明了一种简单的表面改性方法，通过将洋葱状碳（OC）和含氟聚合物直接涂覆到锂金属电极上来改善锂金属电极的电化学稳定性。选择性和快速微波加热的OC导致在原位形成的富LiF复合材料的同时渗透到OC的锂。使用对称的剥离/电镀电池将修饰电极的电化学稳定性与纯锂金属电极进行比较。微波处理的表面涂层作为一个强大的和稳定的钝化层，以防止电解质分解，同时也抑制快速枝晶生长。通过该钝化层，在所有检查的速率（0.5-2 mA/cm 2）下，剥离和镀覆期间的电位稳定性得到增强。随着剥离/电镀能力.
One key limitation of lithium metal electrodes is their propensity for dendrite formation that limits their use in commercial batteries. Here, a simple surface modification method was demonstrated to improve the electrochemical stability of the lithium metal electrode through direct coating of onionlike carbon (OC) and a fluoropolymer onto the lithium metal electrode. Selective and rapid microwave heating of the OC resulted in the in situ formation of a LiF-rich composite with the simultaneous infiltration of lithium into the OC. The electrochemical stability of the modified electrode was compared with a neat lithium metal electrode using symmetric stripping/plating cells. The microwave processed surface coating acted as a robust and stable passivation layer to prevent electrolyte decomposition, while also suppressing fast dendrite growth. The potential stability during the stripping and plating was enhanced at all rates examined (0.5–2 mA/cm2) by this passivation layer. With the stripping/plating capacit...