|论文题目||Designing a self-healing protective film on a lithium metal anode for long-cycle-life lithium-oxygen batteries|
|作 者||; Yue Yu,Yan-Bin Yin, Jin-Ling Ma, Zhi-Wen Chang, Tao Sun, Yun-Hai Zhu, Xiao-Yang Yang, Tong Liu,Xin-Bo Zhang|
|刊物名称||ENERGY STORAGE MATERIALS|
|卷、期、页码||18; ; 382-388|
The development of high energy density Li-O-2 batteries is hindered by many scientific and technological challenges, especially the intrinsic corrosion of the lithium metal anode induced by O-2, H2O and discharge intermediates in electrolytes. In response, as a proof-of-concept experiment, we first propose and demonstrate a facile and highly efficient strategy for the in situ growth of a self-healing protective film on a lithium metal anode, wherein tetraethyl orthosilicate plays a key role as a novel film-forming electrolyte additive. This additive can spontaneously and effectively react with the main component of the detrimental surface corrosion layer (lithium hydroxide) on the lithium metal anode, forming a self-healing protective film with dynamic repair ability during the cycling process. Unexpectedly, the protected lithium metal anode endows the Li-O-2 batteries with significantly improved battery cycle performance (up to 144 cycles). We consider that our facile, low-cost, and highly effective lithium protection strategy presents a new avenue to address the daunting corrosion problem of lithium metal anodes in Li-O-2 batteries, which can be easily extended to other metal-O-2 battery systems such as Na-O-2 batteries.